chore: update dependencies

Allow customization of the template loading process by providing a
Loader implementation.

Allow auto-reloading of templates in development mode.

.gitignore

@@ -1 +1,3 @@
-/coverage
+/coverage
+/bin
+/.vscode

LICENCE

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+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
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+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.

Makefile

@@ -1,6 +1,9 @@
 test:
 	go clean -testcache
-	go test -v ./...
+	go test -v -race ./...
+
+watch:
+	modd
 	
 deps:
 	go get -u golang.org/x/tools/cmd/godoc

api/api.go

@@ -8,39 +8,41 @@ import (
 
 // Response is a JSON encoded HTTP response body
 type Response struct {
-	Error *Error      `json:",omitempty"`
-	Data  interface{} `json:",omitempty"`
+	Error *Error      `json:"error,omitempty"`
+	Data  interface{} `json:"data,omitempty"`
 }
 
 type ErrorCode string
 
 // Error is a JSON encoded error
 type Error struct {
-	Code ErrorCode
-	Data interface{} `json:",omitempty"`
+	Code ErrorCode   `json:"code"`
+	Data interface{} `json:"data,omitempty"`
 }
 
 func (e *Error) Error() string {
-	return fmt.Sprintf("%s: %v", e.Code, e.Data)
+	return fmt.Sprintf("api-error: %s", e.Code)
 }
 
 func DataResponse(w http.ResponseWriter, status int, data interface{}) {
 	response(w, status, &Response{
 		Data: data,
-	})
+	}, false)
 }
 
 func ErrorResponse(w http.ResponseWriter, status int, code ErrorCode, data interface{}) {
 	response(w, status, &Response{
 		Error: &Error{code, data},
-	})
+	}, false)
 }
 
-func response(w http.ResponseWriter, status int, res *Response) {
+func response(w http.ResponseWriter, status int, res *Response, conventional bool) {
 	w.Header().Set("Content-Type", "application/json")
 	w.WriteHeader(status)
+
 	encoder := json.NewEncoder(w)
 	encoder.SetIndent("", "  ")
+
 	if err := encoder.Encode(res); err != nil {
 		panic(err)
 	}

api/bind.go

@@ -4,6 +4,8 @@ import (
 	"encoding/json"
 	"net/http"
 
+	"github.com/pkg/errors"
+	"gitlab.com/wpetit/goweb/logger"
 	validator "gopkg.in/go-playground/validator.v9"
 )
 
@@ -11,6 +13,10 @@ const (
 	ErrCodeMalformedRequest  ErrorCode = "malformed-request"
 	ErrCodeInvalidRequest    ErrorCode = "invalid-request"
 	ErrCodeInvalidFieldValue ErrorCode = "invalid-field-value"
+	ErrCodeNotFound          ErrorCode = "not-found"
+	ErrCodeUnknownError      ErrorCode = "unknown-error"
+	ErrCodeUnauthorized      ErrorCode = "unauthorized"
+	ErrCodeForbidden         ErrorCode = "forbidden"
 )
 
 // Bind parses and bind the request body to the given target
@@ -21,6 +27,7 @@ const (
 // validation.
 func Bind(w http.ResponseWriter, r *http.Request, target interface{}) (ok bool) {
 	if err := parseBody(r, target); err != nil {
+		logger.Error(r.Context(), "malformed request", logger.E(errors.WithStack(err)))
 		ErrorResponse(
 			w, http.StatusBadRequest,
 			ErrCodeMalformedRequest,

cli/format/json/writer.go

@@ -0,0 +1,38 @@
+package json
+
+import (
+	"encoding/json"
+	"io"
+
+	"github.com/pkg/errors"
+	"gitlab.com/wpetit/goweb/cli/format"
+)
+
+const Format format.Format = "json"
+
+func init() {
+	format.Register(Format, NewWriter())
+}
+
+type Writer struct{}
+
+// Format implements format.Writer.
+func (*Writer) Write(writer io.Writer, hints format.Hints, data ...any) error {
+	encoder := json.NewEncoder(writer)
+
+	if hints.OutputMode == format.OutputModeWide {
+		encoder.SetIndent("", " ")
+	}
+
+	if err := encoder.Encode(data); err != nil {
+		return errors.WithStack(err)
+	}
+
+	return nil
+}
+
+func NewWriter() *Writer {
+	return &Writer{}
+}
+
+var _ format.Writer = &Writer{}

cli/format/prop.go

@@ -0,0 +1,49 @@
+package format
+
+type PropHintName string
+
+type PropHintFunc func() (PropHintName, any)
+
+type Prop struct {
+	name  string
+	label string
+	hints map[PropHintName]any
+}
+
+func (p *Prop) Name() string {
+	return p.name
+}
+
+func (p *Prop) Label() string {
+	return p.label
+}
+
+func NewProp(name, label string, funcs ...PropHintFunc) Prop {
+	hints := make(map[PropHintName]any)
+	for _, fn := range funcs {
+		name, value := fn()
+		hints[name] = value
+	}
+
+	return Prop{name, label, hints}
+}
+
+func WithPropHint(name PropHintName, value any) PropHintFunc {
+	return func() (PropHintName, any) {
+		return name, value
+	}
+}
+
+func PropHint[T any](p Prop, name PropHintName, defaultValue T) T {
+	rawValue, exists := p.hints[name]
+	if !exists {
+		return defaultValue
+	}
+
+	value, ok := rawValue.(T)
+	if !ok {
+		return defaultValue
+	}
+
+	return value
+}

cli/format/registry.go

@@ -0,0 +1,46 @@
+package format
+
+import (
+	"io"
+
+	"github.com/pkg/errors"
+)
+
+type Format string
+
+type Registry map[Format]Writer
+
+var defaultRegistry = Registry{}
+
+var ErrUnknownFormat = errors.New("unknown format")
+
+func Write(format Format, writer io.Writer, hints Hints, data ...any) error {
+	formatWriter, exists := defaultRegistry[format]
+	if !exists {
+		return errors.WithStack(ErrUnknownFormat)
+	}
+
+	if hints.OutputMode == "" {
+		hints.OutputMode = OutputModeCompact
+	}
+
+	if err := formatWriter.Write(writer, hints, data...); err != nil {
+		return errors.WithStack(err)
+	}
+
+	return nil
+}
+
+func Available() []Format {
+	formats := make([]Format, 0, len(defaultRegistry))
+
+	for f := range defaultRegistry {
+		formats = append(formats, f)
+	}
+
+	return formats
+}
+
+func Register(format Format, writer Writer) {
+	defaultRegistry[format] = writer
+}

cli/format/table/prop.go

@@ -0,0 +1,65 @@
+package table
+
+import (
+	"encoding/json"
+	"fmt"
+	"reflect"
+
+	"github.com/pkg/errors"
+	"gitlab.com/wpetit/goweb/cli/format"
+)
+
+const (
+	hintCompactModeMaxColumnWidth format.PropHintName = "compactModeMaxColumnWidth"
+)
+
+func WithCompactModeMaxColumnWidth(max int) format.PropHintFunc {
+	return format.WithPropHint(hintCompactModeMaxColumnWidth, max)
+}
+
+func getProps(d any) []format.Prop {
+	props := make([]format.Prop, 0)
+
+	v := reflect.Indirect(reflect.ValueOf(d))
+	typeOf := v.Type()
+
+	for i := 0; i < v.NumField(); i++ {
+		name := typeOf.Field(i).Name
+		props = append(props, format.NewProp(name, name))
+	}
+
+	return props
+}
+
+func getFieldValue(obj any, name string) string {
+	v := reflect.Indirect(reflect.ValueOf(obj))
+
+	fieldValue := v.FieldByName(name)
+
+	if !fieldValue.IsValid() {
+		return ""
+	}
+
+	if fieldValue.Kind() == reflect.Pointer && !fieldValue.IsNil() {
+		fieldValue = fieldValue.Elem()
+	}
+
+	switch fieldValue.Kind() {
+	case reflect.Map:
+		fallthrough
+	case reflect.Struct:
+		fallthrough
+	case reflect.Slice:
+		fallthrough
+	case reflect.Interface:
+		json, err := json.Marshal(fieldValue.Interface())
+		if err != nil {
+			panic(errors.WithStack(err))
+		}
+
+		return string(json)
+
+	default:
+		return fmt.Sprintf("%v", fieldValue)
+	}
+}

cli/format/table/writer.go

@@ -0,0 +1,80 @@
+package table
+
+import (
+	"io"
+
+	"github.com/jedib0t/go-pretty/v6/table"
+	"gitlab.com/wpetit/goweb/cli/format"
+)
+
+const Format format.Format = "table"
+
+const DefaultCompactModeMaxColumnWidth = 30
+
+func init() {
+	format.Register(Format, NewWriter(DefaultCompactModeMaxColumnWidth))
+}
+
+type Writer struct {
+	compactModeMaxColumnWidth int
+}
+
+// Write implements format.Writer.
+func (w *Writer) Write(writer io.Writer, hints format.Hints, data ...any) error {
+	t := table.NewWriter()
+
+	t.SetOutputMirror(writer)
+
+	var props []format.Prop
+
+	if hints.Props != nil {
+		props = hints.Props
+	} else {
+		if len(data) > 0 {
+			props = getProps(data[0])
+		} else {
+			props = make([]format.Prop, 0)
+		}
+	}
+
+	labels := table.Row{}
+
+	for _, p := range props {
+		labels = append(labels, p.Label())
+	}
+
+	t.AppendHeader(labels)
+
+	isCompactMode := hints.OutputMode == format.OutputModeCompact
+
+	for _, d := range data {
+		row := table.Row{}
+
+		for _, p := range props {
+			value := getFieldValue(d, p.Name())
+
+			compactModeMaxColumnWidth := format.PropHint(p,
+				hintCompactModeMaxColumnWidth,
+				w.compactModeMaxColumnWidth,
+			)
+
+			if isCompactMode && len(value) > compactModeMaxColumnWidth {
+				value = value[:compactModeMaxColumnWidth] + "..."
+			}
+
+			row = append(row, value)
+		}
+
+		t.AppendRow(row)
+	}
+
+	t.Render()
+
+	return nil
+}
+
+func NewWriter(compactModeMaxColumnWidth int) *Writer {
+	return &Writer{compactModeMaxColumnWidth}
+}
+
+var _ format.Writer = &Writer{}

cli/format/table/writer_test.go

@@ -0,0 +1,101 @@
+package table
+
+import (
+	"bytes"
+	"fmt"
+	"strings"
+	"testing"
+
+	"github.com/pkg/errors"
+	"gitlab.com/wpetit/goweb/cli/format"
+)
+
+type dummyItem struct {
+	MyString   string
+	MyInt      int
+	MySub      subItem
+	MySubPtr   *subItem
+	MyPointStr *string
+}
+
+func (d *dummyItem) MyMethod() string {
+	return fmt.Sprintf("myMethod: %s | %d", d.MyString, d.MyInt)
+}
+
+type subItem struct {
+	MyBool bool
+}
+
+var dummyItems = []any{
+	dummyItem{
+		MyString: "Foo",
+		MyInt:    1,
+		MySub: subItem{
+			MyBool: false,
+		},
+	},
+	dummyItem{
+		MyString: "Bar",
+		MyInt:    0,
+		MySub: subItem{
+			MyBool: true,
+		},
+		MySubPtr: &subItem{
+			MyBool: false,
+		},
+		MyPointStr: strPtr("Test"),
+	},
+}
+
+func TestWriterNoHints(t *testing.T) {
+	var buf bytes.Buffer
+
+	writer := NewWriter(DefaultCompactModeMaxColumnWidth)
+
+	if err := writer.Write(&buf, format.Hints{}, dummyItems...); err != nil {
+		t.Fatalf("%+v", errors.WithStack(err))
+	}
+
+	expected := `+----------+-------+------------------+------------------+------------+
+| MYSTRING | MYINT | MYSUB            | MYSUBPTR         | MYPOINTSTR |
++----------+-------+------------------+------------------+------------+
+| Foo      | 1     | {"MyBool":false} | <nil>            | <nil>      |
+| Bar      | 0     | {"MyBool":true}  | {"MyBool":false} | Test       |
++----------+-------+------------------+------------------+------------+`
+
+	if e, g := strings.TrimSpace(expected), strings.TrimSpace(buf.String()); e != g {
+		t.Errorf("buf.String(): expected \n%v\ngot\n%v", e, g)
+	}
+}
+
+func TestWriterWithPropHints(t *testing.T) {
+	var buf bytes.Buffer
+
+	writer := NewWriter(DefaultCompactModeMaxColumnWidth)
+
+	hints := format.Hints{
+		Props: []format.Prop{
+			format.NewProp("MyString", "MyString"),
+			format.NewProp("MyInt", "MyInt"),
+		},
+	}
+
+	if err := writer.Write(&buf, hints, dummyItems...); err != nil {
+		t.Fatalf("%+v", errors.WithStack(err))
+	}
+
+	expected := `+----------+-------+
+| MYSTRING | MYINT |
++----------+-------+
+| Foo      | 1     |
+| Bar      | 0     |
++----------+-------+`
+
+	if e, g := strings.TrimSpace(expected), strings.TrimSpace(buf.String()); e != g {
+		t.Errorf("buf.String(): expected \n%v\ngot\n%v", e, g)
+	}
+}
+
+func strPtr(str string) *string {
+	return &str
+}

cli/format/writer.go

@@ -0,0 +1,19 @@
+package format
+
+import "io"
+
+type OutputMode string
+
+const (
+	OutputModeWide    OutputMode = "wide"
+	OutputModeCompact OutputMode = "compact"
+)
+
+type Hints struct {
+	Props      []Prop
+	OutputMode OutputMode
+}
+
+type Writer interface {
+	Write(writer io.Writer, hints Hints, data ...any) error
+}

cqrs/bus_test.go

@@ -0,0 +1,52 @@
+package cqrs
+
+import (
+	"context"
+	"testing"
+)
+
+type testCommandRequest struct {
+	Foo string
+}
+
+func TestSimpleCommandExec(t *testing.T) {
+	dispatcher := NewDispatcher()
+
+	handlerCalled := false
+
+	handleTestCommand := func(ctx context.Context, cmd Command) error {
+		handlerCalled = true
+		return nil
+	}
+
+	dispatcher.RegisterCommand(
+		MatchCommandRequest(&testCommandRequest{}),
+		CommandHandlerFunc(handleTestCommand),
+	)
+
+	cmd := &testCommandRequest{
+		Foo: "bar",
+	}
+	ctx := context.Background()
+
+	result, err := dispatcher.Exec(ctx, cmd)
+	if err != nil {
+		t.Error(err)
+	}
+
+	if result == nil {
+		t.Error("result should not be nil")
+	}
+
+	if result.Command() == nil {
+		t.Error("result.Command() should not be nil")
+	}
+
+	if e, g := result.Command().Request(), cmd; e != g {
+		t.Errorf("result.Command().Request(): expected '%v', got '%v'", e, g)
+	}
+
+	if e, g := handlerCalled, true; e != g {
+		t.Errorf("handlerCalled: expected '%v', got '%v'", e, g)
+	}
+}

cqrs/command.go

@@ -0,0 +1,61 @@
+package cqrs
+
+import (
+	"context"
+
+	"github.com/google/uuid"
+)
+
+type CommandID string
+
+type CommandRequest interface {
+}
+
+type Command interface {
+	ID() CommandID
+	Request() CommandRequest
+}
+
+type BaseCommand struct {
+	id  CommandID
+	req CommandRequest
+}
+
+func (c *BaseCommand) ID() CommandID {
+	return c.id
+}
+
+func (c *BaseCommand) Request() CommandRequest {
+	return c.req
+}
+
+func NewBaseCommand(req CommandRequest) *BaseCommand {
+	id := CommandID(uuid.New().String())
+	return &BaseCommand{id, req}
+}
+
+type CommandResult interface {
+	Command() Command
+}
+
+type BaseCommandResult struct {
+	cmd Command
+}
+
+func (r *BaseCommandResult) Command() Command {
+	return r.cmd
+}
+
+func NewBaseCommandResult(cmd Command) *BaseCommandResult {
+	return &BaseCommandResult{cmd}
+}
+
+type CommandHandlerFunc func(context.Context, Command) error
+
+func (h CommandHandlerFunc) Handle(ctx context.Context, cmd Command) error {
+	return h(ctx, cmd)
+}
+
+type CommandHandler interface {
+	Handle(context.Context, Command) error
+}

cqrs/dispatcher.go

@@ -0,0 +1,92 @@
+package cqrs
+
+import (
+	"context"
+)
+
+type Dispatcher struct {
+	reg              *Registry
+	cmdFactory       CommandFactory
+	cmdResultFactory CommandResultFactory
+	qryFactory       QueryFactory
+	qryResultFactory QueryResultFactory
+}
+
+func (d *Dispatcher) Exec(ctx context.Context, req CommandRequest) (CommandResult, error) {
+	cmd, err := d.cmdFactory(req)
+	if err != nil {
+		return nil, err
+	}
+
+	hdlr, mdlwrs, err := d.reg.MatchCommand(cmd)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(mdlwrs) > 0 {
+		for i := len(mdlwrs) - 1; i >= 0; i-- {
+			hdlr = mdlwrs[i](hdlr)
+		}
+	}
+
+	if err := hdlr.Handle(ctx, cmd); err != nil {
+		return nil, err
+	}
+
+	result, err := d.cmdResultFactory(cmd)
+	if err != nil {
+		return nil, err
+	}
+
+	return result, nil
+}
+
+func (d *Dispatcher) Query(ctx context.Context, req QueryRequest) (QueryResult, error) {
+	qry, err := d.qryFactory(req)
+	if err != nil {
+		return nil, err
+	}
+
+	hdlr, mdlwrs, err := d.reg.MatchQuery(qry)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(mdlwrs) > 0 {
+		for i := len(mdlwrs) - 1; i >= 0; i-- {
+			hdlr = mdlwrs[i](hdlr)
+		}
+	}
+
+	data, err := hdlr.Handle(ctx, qry)
+	if err != nil {
+		return nil, err
+	}
+
+	result, err := d.qryResultFactory(qry, data)
+	if err != nil {
+		return nil, err
+	}
+
+	return result, nil
+}
+
+func (d *Dispatcher) RegisterCommand(match MatchFunc, hdlr CommandHandler, mdlwrs ...CommandMiddleware) {
+	d.reg.RegisterCommand(match, hdlr, mdlwrs...)
+}
+
+func (d *Dispatcher) RegisterQuery(match MatchFunc, hdlr QueryHandler, mdlwrs ...QueryMiddleware) {
+	d.reg.RegisterQuery(match, hdlr, mdlwrs...)
+}
+
+func NewDispatcher(funcs ...OptionFunc) *Dispatcher {
+	opt := CreateOption(funcs...)
+
+	return &Dispatcher{
+		reg:              NewRegistry(),
+		cmdFactory:       opt.CommandFactory,
+		cmdResultFactory: opt.CommandResultFactory,
+		qryFactory:       opt.QueryFactory,
+		qryResultFactory: opt.QueryResultFactory,
+	}
+}

cqrs/error.go

@@ -0,0 +1,9 @@
+package cqrs
+
+import "errors"
+
+var (
+	ErrHandlerNotFound   = errors.New("handler not found")
+	ErrUnexpectedRequest = errors.New("unexpected request")
+	ErrUnexpectedData    = errors.New("unexpected data")
+)

cqrs/match.go

@@ -0,0 +1,33 @@
+package cqrs
+
+import (
+	"reflect"
+)
+
+type MatchFunc func(interface{}) (bool, error)
+
+func MatchCommandRequest(req interface{}) MatchFunc {
+	reqType := reflect.TypeOf(req)
+
+	return func(raw interface{}) (bool, error) {
+		cmd, ok := raw.(Command)
+		if !ok {
+			return false, ErrUnexpectedRequest
+		}
+
+		return reflect.TypeOf(cmd.Request()) == reqType, nil
+	}
+}
+
+func MatchQueryRequest(req interface{}) MatchFunc {
+	reqType := reflect.TypeOf(req)
+
+	return func(raw interface{}) (bool, error) {
+		cmd, ok := raw.(Query)
+		if !ok {
+			return false, ErrUnexpectedRequest
+		}
+
+		return reflect.TypeOf(cmd.Request()) == reqType, nil
+	}
+}

cqrs/match_test.go

@@ -0,0 +1,42 @@
+package cqrs
+
+import "testing"
+
+type testType struct{}
+
+func TestMatchCommandRequestType(t *testing.T) {
+	match := MatchCommandRequest(&testType{})
+
+	cmd := NewBaseCommand(&testType{})
+
+	matches, err := match(cmd)
+	if err != nil {
+		t.Error(err)
+	}
+
+	if e, g := true, matches; e != g {
+		t.Errorf("match(&testType{}): expected '%v', got '%v'", e, g)
+	}
+
+	cmd = NewBaseCommand(nil)
+
+	matches, err = match(cmd)
+	if err != nil {
+		t.Error(err)
+	}
+
+	if e, g := false, matches; e != g {
+		t.Errorf("match(nil): expected '%v', got '%v'", e, g)
+	}
+
+	cmd = NewBaseCommand("test")
+
+	matches, err = match(cmd)
+	if err != nil {
+		t.Error(err)
+	}
+
+	if e, g := false, matches; e != g {
+		t.Errorf("match(\"test\"): expected '%v', got '%v'", e, g)
+	}
+}

cqrs/middleware_test.go

@@ -0,0 +1,64 @@
+package cqrs
+
+import (
+	"context"
+	"testing"
+)
+
+func TestBasicCommandMiddleware(t *testing.T) {
+	dispatcher := NewDispatcher()
+
+	handlerCalled := false
+
+	handleTestCommand := func(ctx context.Context, cmd Command) error {
+		handlerCalled = true
+		return nil
+	}
+
+	middlewareCalled := false
+
+	commandMiddleware := func(next CommandHandler) CommandHandler {
+		fn := func(ctx context.Context, cmd Command) error {
+			middlewareCalled = true
+			return next.Handle(ctx, cmd)
+		}
+
+		return CommandHandlerFunc(fn)
+	}
+
+	dispatcher.RegisterCommand(
+		MatchCommandRequest(&testCommandRequest{}),
+		CommandHandlerFunc(handleTestCommand),
+		commandMiddleware,
+	)
+
+	cmd := &testCommandRequest{
+		Foo: "bar",
+	}
+	ctx := context.Background()
+
+	result, err := dispatcher.Exec(ctx, cmd)
+	if err != nil {
+		t.Error(err)
+	}
+
+	if result == nil {
+		t.Error("result should not be nil")
+	}
+
+	if result.Command() == nil {
+		t.Error("result.Command() should not be nil")
+	}
+
+	if e, g := result.Command().Request(), cmd; e != g {
+		t.Errorf("result.Command().Request(): expected '%v', got '%v'", e, g)
+	}
+
+	if e, g := middlewareCalled, true; e != g {
+		t.Errorf("middlewareCalled: expected '%v', got '%v'", e, g)
+	}
+
+	if e, g := handlerCalled, true; e != g {
+		t.Errorf("handlerCalled: expected '%v', got '%v'", e, g)
+	}
+}

cqrs/option.go

@@ -0,0 +1,86 @@
+package cqrs
+
+type Option struct {
+	CommandFactory       CommandFactory
+	QueryFactory         QueryFactory
+	CommandResultFactory CommandResultFactory
+	QueryResultFactory   QueryResultFactory
+}
+
+type CommandFactory func(CommandRequest) (Command, error)
+type QueryFactory func(QueryRequest) (Query, error)
+type CommandResultFactory func(Command) (CommandResult, error)
+type QueryResultFactory func(Query, interface{}) (QueryResult, error)
+
+type OptionFunc func(*Option)
+
+func DefaultOption() *Option {
+	funcs := []OptionFunc{
+		WithBaseQueryFactory(),
+		WithBaseCommandFactory(),
+		WithBaseQueryResultFactory(),
+		WithBaseCommandResultFactory(),
+	}
+
+	opt := &Option{}
+
+	for _, fn := range funcs {
+		fn(opt)
+	}
+
+	return opt
+}
+
+func CreateOption(funcs ...OptionFunc) *Option {
+	opt := DefaultOption()
+
+	for _, fn := range funcs {
+		fn(opt)
+	}
+
+	return opt
+}
+
+func WithCommandFactory(factory CommandFactory) OptionFunc {
+	return func(opt *Option) {
+		opt.CommandFactory = factory
+	}
+}
+
+func WithQueryFactory(factory QueryFactory) OptionFunc {
+	return func(opt *Option) {
+		opt.QueryFactory = factory
+	}
+}
+
+func WithBaseQueryFactory() OptionFunc {
+	return func(opt *Option) {
+		opt.QueryFactory = func(req QueryRequest) (Query, error) {
+			return NewBaseQuery(req), nil
+		}
+	}
+}
+
+func WithBaseCommandFactory() OptionFunc {
+	return func(opt *Option) {
+		opt.CommandFactory = func(req CommandRequest) (Command, error) {
+			return NewBaseCommand(req), nil
+		}
+	}
+}
+
+func WithBaseQueryResultFactory() OptionFunc {
+	return func(opt *Option) {
+		opt.QueryResultFactory = func(qry Query, data interface{}) (QueryResult, error) {
+			return NewBaseQueryResult(qry, data), nil
+		}
+	}
+}
+
+func WithBaseCommandResultFactory() OptionFunc {
+	return func(opt *Option) {
+		opt.CommandResultFactory = func(cmd Command) (CommandResult, error) {
+			return NewBaseCommandResult(cmd), nil
+		}
+	}
+}

cqrs/provider.go

@@ -0,0 +1,13 @@
+package cqrs
+
+import "gitlab.com/wpetit/goweb/service"
+
+// ServiceProvider returns a service.Provider for the
+// the cqrs service
+func ServiceProvider() service.Provider {
+	dispatcher := NewDispatcher()
+
+	return func(container *service.Container) (interface{}, error) {
+		return dispatcher, nil
+	}
+}

cqrs/query.go

@@ -0,0 +1,66 @@
+package cqrs
+
+import (
+	"context"
+
+	"github.com/google/uuid"
+)
+
+type QueryID string
+
+type QueryRequest interface{}
+
+type Query interface {
+	ID() QueryID
+	Request() QueryRequest
+}
+
+type BaseQuery struct {
+	id  QueryID
+	req QueryRequest
+}
+
+func (q *BaseQuery) ID() QueryID {
+	return q.id
+}
+
+func (q *BaseQuery) Request() QueryRequest {
+	return q.req
+}
+
+func NewBaseQuery(req QueryRequest) *BaseQuery {
+	id := QueryID(uuid.New().String())
+	return &BaseQuery{id, req}
+}
+
+type QueryResult interface {
+	Query() Query
+	Data() interface{}
+}
+
+type BaseQueryResult struct {
+	qry  Query
+	data interface{}
+}
+
+func (r *BaseQueryResult) Query() Query {
+	return r.qry
+}
+
+func (r *BaseQueryResult) Data() interface{} {
+	return r.data
+}
+
+func NewBaseQueryResult(qry Query, data interface{}) *BaseQueryResult {
+	return &BaseQueryResult{qry, data}
+}
+
+type QueryHandlerFunc func(context.Context, Query) (interface{}, error)
+
+func (h QueryHandlerFunc) Handle(ctx context.Context, qry Query) (interface{}, error) {
+	return h(ctx, qry)
+}
+
+type QueryHandler interface {
+	Handle(context.Context, Query) (interface{}, error)
+}

cqrs/registry.go

@@ -0,0 +1,68 @@
+package cqrs
+
+type CommandMiddleware func(next CommandHandler) CommandHandler
+type QueryMiddleware func(next QueryHandler) QueryHandler
+
+type Registry struct {
+	commands []*commandHandler
+	queries  []*queryHandler
+}
+
+type commandHandler struct {
+	Match       MatchFunc
+	Handler     CommandHandler
+	Middlewares []CommandMiddleware
+}
+
+type queryHandler struct {
+	Match       MatchFunc
+	Handler     QueryHandler
+	Middlewares []QueryMiddleware
+}
+
+func (r *Registry) MatchCommand(cmd Command) (CommandHandler, []CommandMiddleware, error) {
+	// TODO cache matching to avoid unnecessary ops
+	for _, reg := range r.commands {
+		matches, err := reg.Match(cmd)
+		if err != nil {
+			return nil, nil, err
+		}
+
+		if matches {
+			return reg.Handler, reg.Middlewares, nil
+		}
+	}
+
+	return nil, nil, ErrHandlerNotFound
+}
+
+func (r *Registry) MatchQuery(qry Query) (QueryHandler, []QueryMiddleware, error) {
+	// TODO cache matching to avoid unnecessary ops
+	for _, reg := range r.queries {
+		matches, err := reg.Match(qry)
+		if err != nil {
+			return nil, nil, err
+		}
+
+		if matches {
+			return reg.Handler, reg.Middlewares, nil
+		}
+	}
+
+	return nil, nil, ErrHandlerNotFound
+}
+
+func (r *Registry) RegisterCommand(match MatchFunc, hdlr CommandHandler, mdlwrs ...CommandMiddleware) {
+	r.commands = append(r.commands, &commandHandler{match, hdlr, mdlwrs})
+}
+
+func (r *Registry) RegisterQuery(match MatchFunc, hdlr QueryHandler, mdlwrs ...QueryMiddleware) {
+	r.queries = append(r.queries, &queryHandler{match, hdlr, mdlwrs})
+}
+
+func NewRegistry() *Registry {
+	return &Registry{
+		commands: make([]*commandHandler, 0),
+		queries:  make([]*queryHandler, 0),
+	}
+}

cqrs/service.go

@@ -0,0 +1,34 @@
+package cqrs
+
+import (
+	"github.com/pkg/errors"
+	"gitlab.com/wpetit/goweb/service"
+)
+
+// ServiceName defines the cqrs service name
+const ServiceName service.Name = "cqrs"
+
+// From retrieves the cqrs service in the given container
+func From(container *service.Container) (*Dispatcher, error) {
+	raw, err := container.Service(ServiceName)
+	if err != nil {
+		return nil, errors.Wrapf(err, "error while retrieving '%s' service", ServiceName)
+	}
+
+	srv, ok := raw.(*Dispatcher)
+	if !ok {
+		return nil, errors.Errorf("retrieved service is not a valid '%s' service", ServiceName)
+	}
+
+	return srv, nil
+}
+
+// Must retrieves the cqrs service in the given container or panic otherwise
+func Must(container *service.Container) *Dispatcher {
+	service, err := From(container)
+	if err != nil {
+		panic(err)
+	}
+
+	return service
+}

example/pluggable/.gitignore

@@ -0,0 +1 @@
+/bin

example/pluggable/Makefile

@@ -0,0 +1,11 @@
+build: extension
+	go build -o ./bin/app ./
+
+extension:
+	go build  -o ./bin/myplugin.so -buildmode=plugin ./myplugin
+
+watch:
+	modd
+
+run:
+	./bin/app

example/pluggable/hook/initializable.go

@@ -0,0 +1,5 @@
+package hook
+
+type Initializable interface {
+	HookInit() error
+}

example/pluggable/main.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"context"
+	"log"
+
+	"github.com/pkg/errors"
+	"gitlab.com/wpetit/goweb/example/pluggable/hook"
+	"gitlab.com/wpetit/goweb/plugin"
+)
+
+func main() {
+	reg := plugin.NewRegistry()
+	ctx := context.Background()
+
+	_, err := reg.LoadAll(ctx, "./bin/*.so")
+	if err != nil {
+		log.Fatal(errors.WithStack(err))
+	}
+
+	for _, ext := range reg.Plugins() {
+		log.Printf("Loaded plugin '%s', version '%s'", ext.PluginName(), ext.PluginVersion())
+	}
+
+	// Iterate over plugins
+	err = reg.Each(func(p plugin.Plugin) error {
+		h, ok := p.(hook.Initializable)
+		if !ok {
+			// Skip non initializable plugins
+			return nil
+		}
+
+		// Initialize plugin
+		if err := h.HookInit(); err != nil {
+			return errors.WithStack(err)
+		}
+
+		return nil
+	})
+
+	if err != nil {
+		log.Fatal(errors.WithStack(err))
+	}
+}

example/pluggable/modd.conf

@@ -0,0 +1,6 @@
+**/*.go
+modd.conf
+Makefile {
+    prep: make build
+    prep: make run
+}

example/pluggable/myplugin/main.go

@@ -0,0 +1,11 @@
+package main
+
+import (
+	"context"
+
+	"gitlab.com/wpetit/goweb/plugin"
+)
+
+func RegisterPlugin(ctx context.Context) (plugin.Plugin, error) {
+	return &MyPlugin{}, nil
+}

example/pluggable/myplugin/plugin.go

@@ -0,0 +1,19 @@
+package main
+
+import "log"
+
+type MyPlugin struct{}
+
+func (e *MyPlugin) PluginName() string {
+	return "my.plugin"
+}
+
+func (e *MyPlugin) PluginVersion() string {
+	return "0.0.0"
+}
+
+func (e *MyPlugin) HookInit() error {
+	log.Println("MyPlugin initialized !")
+
+	return nil
+}

go.mod

@@ -1,18 +1,39 @@
 module gitlab.com/wpetit/goweb
 
-go 1.12
+go 1.21
+
+toolchain go1.21.4
 
 require (
-	github.com/davecgh/go-spew v1.1.0
+	cdr.dev/slog v1.6.1
 	github.com/go-chi/chi v4.0.2+incompatible
-	github.com/go-playground/locales v0.12.1 // indirect
-	github.com/go-playground/universal-translator v0.16.0 // indirect
+	github.com/go-chi/chi/v5 v5.0.10
+	github.com/google/uuid v1.3.0
 	github.com/gorilla/securecookie v1.1.1
 	github.com/gorilla/sessions v1.2.0
-	github.com/leodido/go-urn v1.1.0 // indirect
 	github.com/oxtoacart/bpool v0.0.0-20190530202638-03653db5a59c
-	github.com/pkg/errors v0.8.1
-	golang.org/x/net v0.0.0-20190724013045-ca1201d0de80 // indirect
-	gopkg.in/go-playground/assert.v1 v1.2.1 // indirect
+	github.com/pkg/errors v0.9.1
 	gopkg.in/go-playground/validator.v9 v9.29.1
 )
+
+require (
+	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
+	github.com/charmbracelet/lipgloss v0.7.1 // indirect
+	github.com/go-playground/locales v0.14.0 // indirect
+	github.com/go-playground/universal-translator v0.18.0 // indirect
+	github.com/jedib0t/go-pretty/v6 v6.4.9
+	github.com/leodido/go-urn v1.2.1 // indirect
+	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
+	github.com/mattn/go-isatty v0.0.19 // indirect
+	github.com/mattn/go-runewidth v0.0.15 // indirect
+	github.com/muesli/reflow v0.3.0 // indirect
+	github.com/muesli/termenv v0.15.2 // indirect
+	github.com/rivo/uniseg v0.4.4 // indirect
+	go.opentelemetry.io/otel v1.21.0 // indirect
+	go.opentelemetry.io/otel/trace v1.21.0 // indirect
+	golang.org/x/crypto v0.11.0 // indirect
+	golang.org/x/sys v0.10.0 // indirect
+	golang.org/x/term v0.10.0 // indirect
+	golang.org/x/xerrors v0.0.0-20231012003039-104605ab7028 // indirect
+	gopkg.in/go-playground/assert.v1 v1.2.1 // indirect
+)

go.sum

@@ -1,33 +1,116 @@
-github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+cdr.dev/slog v1.6.1 h1:IQjWZD0x6//sfv5n+qEhbu3wBkmtBQY5DILXNvMaIv4=
+cdr.dev/slog v1.6.1/go.mod h1:eHEYQLaZvxnIAXC+XdTSNLb/kgA/X2RVSF72v5wsxEI=
+cloud.google.com/go/compute v1.23.0 h1:tP41Zoavr8ptEqaW6j+LQOnyBBhO7OkOMAGrgLopTwY=
+cloud.google.com/go/compute v1.23.0/go.mod h1:4tCnrn48xsqlwSAiLf1HXMQk8CONslYbdiEZc9FEIbM=
+cloud.google.com/go/compute/metadata v0.2.3 h1:mg4jlk7mCAj6xXp9UJ4fjI9VUI5rubuGBW5aJ7UnBMY=
+cloud.google.com/go/compute/metadata v0.2.3/go.mod h1:VAV5nSsACxMJvgaAuX6Pk2AawlZn8kiOGuCv6gTkwuA=
+cloud.google.com/go/logging v1.7.0 h1:CJYxlNNNNAMkHp9em/YEXcfJg+rPDg7YfwoRpMU+t5I=
+cloud.google.com/go/logging v1.7.0/go.mod h1:3xjP2CjkM3ZkO73aj4ASA5wRPGGCRrPIAeNqVNkzY8M=
+cloud.google.com/go/longrunning v0.5.1 h1:Fr7TXftcqTudoyRJa113hyaqlGdiBQkp0Gq7tErFDWI=
+cloud.google.com/go/longrunning v0.5.1/go.mod h1:spvimkwdz6SPWKEt/XBij79E9fiTkHSQl/fRUUQJYJc=
+github.com/aymanbagabas/go-osc52/v2 v2.0.1 h1:HwpRHbFMcZLEVr42D4p7XBqjyuxQH5SMiErDT4WkJ2k=
+github.com/aymanbagabas/go-osc52/v2 v2.0.1/go.mod h1:uYgXzlJ7ZpABp8OJ+exZzJJhRNQ2ASbcXHWsFqH8hp8=
+github.com/charmbracelet/lipgloss v0.7.1 h1:17WMwi7N1b1rVWOjMT+rCh7sQkvDU75B2hbZpc5Kc1E=
+github.com/charmbracelet/lipgloss v0.7.1/go.mod h1:yG0k3giv8Qj8edTCbbg6AlQ5e8KNWpFujkNawKNhE2c=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/go-chi/chi v4.0.2+incompatible h1:maB6vn6FqCxrpz4FqWdh4+lwpyZIQS7YEAUcHlgXVRs=
 github.com/go-chi/chi v4.0.2+incompatible/go.mod h1:eB3wogJHnLi3x/kFX2A+IbTBlXxmMeXJVKy9tTv1XzQ=
-github.com/go-playground/locales v0.12.1 h1:2FITxuFt/xuCNP1Acdhv62OzaCiviiE4kotfhkmOqEc=
-github.com/go-playground/locales v0.12.1/go.mod h1:IUMDtCfWo/w/mtMfIE/IG2K+Ey3ygWanZIBtBW0W2TM=
-github.com/go-playground/universal-translator v0.16.0 h1:X++omBR/4cE2MNg91AoC3rmGrCjJ8eAeUP/K/EKx4DM=
-github.com/go-playground/universal-translator v0.16.0/go.mod h1:1AnU7NaIRDWWzGEKwgtJRd2xk99HeFyHw3yid4rvQIY=
+github.com/go-chi/chi/v5 v5.0.10 h1:rLz5avzKpjqxrYwXNfmjkrYYXOyLJd37pz53UFHC6vk=
+github.com/go-chi/chi/v5 v5.0.10/go.mod h1:DslCQbL2OYiznFReuXYUmQ2hGd1aDpCnlMNITLSKoi8=
+github.com/go-logr/logr v1.3.0 h1:2y3SDp0ZXuc6/cjLSZ+Q3ir+QB9T/iG5yYRXqsagWSY=
+github.com/go-logr/logr v1.3.0/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
+github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
+github.com/go-playground/locales v0.14.0 h1:u50s323jtVGugKlcYeyzC0etD1HifMjqmJqb8WugfUU=
+github.com/go-playground/locales v0.14.0/go.mod h1:sawfccIbzZTqEDETgFXqTho0QybSa7l++s0DH+LDiLs=
+github.com/go-playground/universal-translator v0.18.0 h1:82dyy6p4OuJq4/CByFNOn/jYrnRPArHwAcmLoJZxyho=
+github.com/go-playground/universal-translator v0.18.0/go.mod h1:UvRDBj+xPUEGrFYl+lu/H90nyDXpg0fqeB/AQUGNTVA=
+github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
+github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
+github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/gorilla/securecookie v1.1.1 h1:miw7JPhV+b/lAHSXz4qd/nN9jRiAFV5FwjeKyCS8BvQ=
 github.com/gorilla/securecookie v1.1.1/go.mod h1:ra0sb63/xPlUeL+yeDciTfxMRAA+MP+HVt/4epWDjd4=
 github.com/gorilla/sessions v1.2.0 h1:S7P+1Hm5V/AT9cjEcUD5uDaQSX0OE577aCXgoaKpYbQ=
 github.com/gorilla/sessions v1.2.0/go.mod h1:dk2InVEVJ0sfLlnXv9EAgkf6ecYs/i80K/zI+bUmuGM=
-github.com/leodido/go-urn v1.1.0 h1:Sm1gr51B1kKyfD2BlRcLSiEkffoG96g6TPv6eRoEiB8=
-github.com/leodido/go-urn v1.1.0/go.mod h1:+cyI34gQWZcE1eQU7NVgKkkzdXDQHr1dBMtdAPozLkw=
+github.com/jedib0t/go-pretty/v6 v6.4.9 h1:vZ6bjGg2eBSrJn365qlxGcaWu09Id+LHtrfDWlB2Usc=
+github.com/jedib0t/go-pretty/v6 v6.4.9/go.mod h1:Ndk3ase2CkQbXLLNf5QDHoYb6J9WtVfmHZu9n8rk2xs=
+github.com/leodido/go-urn v1.2.1 h1:BqpAaACuzVSgi/VLzGZIobT2z4v53pjosyNd9Yv6n/w=
+github.com/leodido/go-urn v1.2.1/go.mod h1:zt4jvISO2HfUBqxjfIshjdMTYS56ZS/qv49ictyFfxY=
+github.com/lucasb-eyer/go-colorful v1.2.0 h1:1nnpGOrhyZZuNyfu1QjKiUICQ74+3FNCN69Aj6K7nkY=
+github.com/lucasb-eyer/go-colorful v1.2.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
+github.com/mattn/go-isatty v0.0.19 h1:JITubQf0MOLdlGRuRq+jtsDlekdYPia9ZFsB8h/APPA=
+github.com/mattn/go-isatty v0.0.19/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/mattn/go-runewidth v0.0.12/go.mod h1:RAqKPSqVFrSLVXbA8x7dzmKdmGzieGRCM46jaSJTDAk=
+github.com/mattn/go-runewidth v0.0.13/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
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+github.com/muesli/reflow v0.3.0 h1:IFsN6K9NfGtjeggFP+68I4chLZV2yIKsXJFNZ+eWh6s=
+github.com/muesli/reflow v0.3.0/go.mod h1:pbwTDkVPibjO2kyvBQRBxTWEEGDGq0FlB1BIKtnHY/8=
+github.com/muesli/termenv v0.15.2 h1:GohcuySI0QmI3wN8Ok9PtKGkgkFIk7y6Vpb5PvrY+Wo=
+github.com/muesli/termenv v0.15.2/go.mod h1:Epx+iuz8sNs7mNKhxzH4fWXGNpZwUaJKRS1noLXviQ8=
 github.com/oxtoacart/bpool v0.0.0-20190530202638-03653db5a59c h1:rp5dCmg/yLR3mgFuSOe4oEnDDmGLROTvMragMUXpTQw=
 github.com/oxtoacart/bpool v0.0.0-20190530202638-03653db5a59c/go.mod h1:X07ZCGwUbLaax7L0S3Tw4hpejzu63ZrrQiUe6W0hcy0=
-github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
-github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pkg/profile v1.6.0/go.mod h1:qBsxPvzyUincmltOk6iyRVxHYg4adc0OFOv72ZdLa18=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/rivo/uniseg v0.1.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
+github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
+github.com/rivo/uniseg v0.4.4 h1:8TfxU8dW6PdqD27gjM8MVNuicgxIjxpm4K7x4jp8sis=
+github.com/rivo/uniseg v0.4.4/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/net v0.0.0-20190724013045-ca1201d0de80 h1:Ao/3l156eZf2AW5wK8a7/smtodRU+gha3+BeqJ69lRk=
-golang.org/x/net v0.0.0-20190724013045-ca1201d0de80/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
-golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
-golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.7.4/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+go.opentelemetry.io/otel v1.21.0 h1:hzLeKBZEL7Okw2mGzZ0cc4k/A7Fta0uoPgaJCr8fsFc=
+go.opentelemetry.io/otel v1.21.0/go.mod h1:QZzNPQPm1zLX4gZK4cMi+71eaorMSGT3A4znnUvNNEo=
+go.opentelemetry.io/otel/metric v1.21.0 h1:tlYWfeo+Bocx5kLEloTjbcDwBuELRrIFxwdQ36PlJu4=
+go.opentelemetry.io/otel/metric v1.21.0/go.mod h1:o1p3CA8nNHW8j5yuQLdc1eeqEaPfzug24uvsyIEJRWM=
+go.opentelemetry.io/otel/sdk v1.16.0 h1:Z1Ok1YsijYL0CSJpHt4cS3wDDh7p572grzNrBMiMWgE=
+go.opentelemetry.io/otel/sdk v1.16.0/go.mod h1:tMsIuKXuuIWPBAOrH+eHtvhTL+SntFtXF9QD68aP6p4=
+go.opentelemetry.io/otel/trace v1.21.0 h1:WD9i5gzvoUPuXIXH24ZNBudiarZDKuekPqi/E8fpfLc=
+go.opentelemetry.io/otel/trace v1.21.0/go.mod h1:LGbsEB0f9LGjN+OZaQQ26sohbOmiMR+BaslueVtS/qQ=
+golang.org/x/crypto v0.11.0 h1:6Ewdq3tDic1mg5xRO4milcWCfMVQhI4NkqWWvqejpuA=
+golang.org/x/crypto v0.11.0/go.mod h1:xgJhtzW8F9jGdVFWZESrid1U1bjeNy4zgy5cRr/CIio=
+golang.org/x/net v0.12.0 h1:cfawfvKITfUsFCeJIHJrbSxpeu/E81khclypR0GVT50=
+golang.org/x/net v0.12.0/go.mod h1:zEVYFnQC7m/vmpQFELhcD1EWkZlX69l4oqgmer6hfKA=
+golang.org/x/sys v0.1.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.10.0 h1:SqMFp9UcQJZa+pmYuAKjd9xq1f0j5rLcDIk0mj4qAsA=
+golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/term v0.10.0 h1:3R7pNqamzBraeqj/Tj8qt1aQ2HpmlC+Cx/qL/7hn4/c=
+golang.org/x/term v0.10.0/go.mod h1:lpqdcUyK/oCiQxvxVrppt5ggO2KCZ5QblwqPnfZ6d5o=
+golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
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+golang.org/x/text v0.11.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
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+google.golang.org/genproto/googleapis/api v0.0.0-20230706204954-ccb25ca9f130/go.mod h1:mPBs5jNgx2GuQGvFwUvVKqtn6HsUw9nP64BedgvqEsQ=
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+google.golang.org/grpc v1.57.0/go.mod h1:Sd+9RMTACXwmub0zcNY2c4arhtrbBYD1AUHI/dt16Mo=
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+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/go-playground/assert.v1 v1.2.1 h1:xoYuJVE7KT85PYWrN730RguIQO0ePzVRfFMXadIrXTM=
 gopkg.in/go-playground/assert.v1 v1.2.1/go.mod h1:9RXL0bg/zibRAgZUYszZSwO/z8Y/a8bDuhia5mkpMnE=
 gopkg.in/go-playground/validator.v9 v9.29.1 h1:SvGtYmN60a5CVKTOzMSyfzWDeZRxRuGvRQyEAKbw1xc=
 gopkg.in/go-playground/validator.v9 v9.29.1/go.mod h1:+c9/zcJMFNgbLvly1L1V+PpxWdVbfP1avr/N00E2vyQ=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

goweb_test.go

@@ -20,7 +20,9 @@ func Example_usage() {
 
 	// On expose le service "template" avec l'implémentation
 	// basée sur le moteur de rendu HTML de la librairie standard
-	container.Provide(template.ServiceName, html.ServiceProvider("./templates"))
+	container.Provide(template.ServiceName, html.ServiceProvider(
+		html.NewDirectoryLoader("./templates"),
+	))
 
 	router := chi.NewRouter()
 

logger/logger.go

@@ -0,0 +1,122 @@
+package logger
+
+import (
+	"context"
+	"io"
+	"os"
+
+	"github.com/pkg/errors"
+
+	"cdr.dev/slog/sloggers/slogjson"
+
+	"cdr.dev/slog/sloggers/sloghuman"
+
+	"cdr.dev/slog"
+)
+
+type Format string
+
+const (
+	FormatHuman Format = "human"
+	FormatJSON  Format = "json"
+)
+
+var captureFunc CaptureFunc = func(err error) {}
+
+var defaultLogger slog.Logger // nolint: gochecknoglobals
+
+type Field = slog.Field
+type Map = slog.Map
+type Level = slog.Level
+
+const (
+	LevelCritical Level = slog.LevelCritical
+	LevelError    Level = slog.LevelError
+	LevelWarn     Level = slog.LevelWarn
+	LevelInfo     Level = slog.LevelInfo
+	LevelDebug    Level = slog.LevelDebug
+)
+
+func init() { // nolint: gochecknoinits
+	defaultLogger = Make(FormatHuman, os.Stdout)
+}
+
+func Make(f Format, w io.Writer) slog.Logger {
+	var sink slog.Sink
+
+	switch f {
+	case FormatHuman:
+		sink = sloghuman.Sink(w)
+	case FormatJSON:
+		sink = slogjson.Sink(w)
+	default:
+		panic(errors.Errorf("unknown logger format '%s'", f))
+	}
+
+	return slog.Make(sink)
+}
+
+func Debug(ctx context.Context, msg string, fields ...any) {
+	slog.Helper()
+	defaultLogger.Debug(ctx, msg, fields...)
+}
+
+func Info(ctx context.Context, msg string, fields ...any) {
+	slog.Helper()
+	defaultLogger.Info(ctx, msg, fields...)
+}
+
+func Warn(ctx context.Context, msg string, fields ...any) {
+	slog.Helper()
+	defaultLogger.Warn(ctx, msg, fields...)
+}
+
+func Error(ctx context.Context, msg string, fields ...any) {
+	slog.Helper()
+	defaultLogger.Error(ctx, msg, fields...)
+}
+
+func Critical(ctx context.Context, msg string, fields ...any) {
+	slog.Helper()
+	defaultLogger.Critical(ctx, msg, fields...)
+}
+
+func Fatal(ctx context.Context, msg string, fields ...any) {
+	slog.Helper()
+	defaultLogger.Fatal(ctx, msg, fields...)
+}
+
+func F(name string, value interface{}) Field {
+	return slog.F(name, value)
+}
+
+func M(fields ...Field) Map {
+	return slog.M(fields...)
+}
+
+func E(err error) Field {
+	return slog.Error(err)
+}
+
+func CapturedE(err error) Field {
+	captureFunc(err)
+	return slog.Error(err)
+}
+
+func SetLevel(level Level) {
+	defaultLogger = defaultLogger.Leveled(level)
+}
+
+func SetFormat(format Format) {
+	defaultLogger = Make(format, os.Stdout)
+}
+
+func With(ctx context.Context, fields ...Field) context.Context {
+	return slog.With(ctx, fields...)
+}
+
+type CaptureFunc func(err error)
+
+func SetCaptureFunc(fn CaptureFunc) {
+	captureFunc = fn
+}

logger/logger_test.go

@@ -0,0 +1,13 @@
+package logger
+
+import (
+	"context"
+	"os"
+	"testing"
+)
+
+func TestLogger(t *testing.T) {
+	log := Make(FormatHuman, os.Stdout)
+
+	log.Info(context.Background(), "test")
+}

middleware/container/service_container.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"errors"
 
-	"github.com/go-chi/chi/middleware"
+	"github.com/go-chi/chi/v5/middleware"
 	goweb "gitlab.com/wpetit/goweb/middleware"
 	"gitlab.com/wpetit/goweb/service"
 )
@@ -41,3 +41,9 @@ func Must(ctx context.Context) *service.Container {
 func ServiceContainer(container *service.Container) goweb.Middleware {
 	return middleware.WithValue(KeyServiceContainer, container)
 }
+
+// WithContainer returns a new context.Context with the given *service.Container
+// attached.
+func WithContainer(ctx context.Context, container *service.Container) context.Context {
+	return context.WithValue(ctx, KeyServiceContainer, container)
+}

middleware/debug/debug.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"errors"
 
-	"github.com/go-chi/chi/middleware"
+	"github.com/go-chi/chi/v5/middleware"
 	goweb "gitlab.com/wpetit/goweb/middleware"
 )
 

modd.conf

@@ -0,0 +1,3 @@
+**/*.go {
+    prep: make test
+}

plugin/error.go

@@ -0,0 +1,16 @@
+package plugin
+
+import "errors"
+
+var (
+	// ErrInvalidRegisterFunc is returned when the plugin package
+	// could not find the expected RegisterPlugin func in the loaded
+	// plugin.
+	ErrInvalidRegisterFunc = errors.New("invalid register func")
+	// ErrInvalidPlugin is returned when a loaded plugin does
+	// not match the expected interface.
+	ErrInvalidPlugin = errors.New("invalid plugin")
+	// ErrPluginNotFound is returned when the given plugin could
+	// not be found in the registry.
+	ErrPluginNotFound = errors.New("plugin not found")
+)

plugin/plugin.go

@@ -0,0 +1,6 @@
+package plugin
+
+type Plugin interface {
+	PluginName() string
+	PluginVersion() string
+}

plugin/registry.go

@@ -0,0 +1,117 @@
+package plugin
+
+import (
+	"context"
+	"path/filepath"
+	"plugin"
+	"sync"
+
+	"github.com/pkg/errors"
+)
+
+type Registry struct {
+	plugins map[string]Plugin
+	mutex   sync.RWMutex
+}
+
+func (r *Registry) Add(plg Plugin) {
+	r.mutex.Lock()
+	defer r.mutex.Unlock()
+
+	r.plugins[plg.PluginName()] = plg
+}
+
+func (r *Registry) Get(name string) (Plugin, error) {
+	r.mutex.RLock()
+	defer r.mutex.RUnlock()
+
+	plg, exists := r.plugins[name]
+	if !exists {
+		return nil, errors.WithStack(ErrPluginNotFound)
+	}
+
+	return plg, nil
+}
+
+func (r *Registry) Load(ctx context.Context, path string) (Plugin, error) {
+	p, err := plugin.Open(path)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	registerFuncSymbol, err := p.Lookup("RegisterPlugin")
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	register, ok := registerFuncSymbol.(func(context.Context) (Plugin, error))
+	if !ok {
+		return nil, errors.WithStack(ErrInvalidRegisterFunc)
+	}
+
+	plg, err := register(ctx)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	if plg == nil {
+		return nil, errors.WithStack(ErrInvalidPlugin)
+	}
+
+	r.Add(plg)
+
+	return plg, nil
+}
+
+func (r *Registry) LoadAll(ctx context.Context, pattern string) ([]Plugin, error) {
+	extensions := make([]Plugin, 0)
+
+	matches, err := filepath.Glob(pattern)
+	if err != nil {
+		return nil, errors.WithStack(err)
+	}
+
+	for _, m := range matches {
+		ext, err := r.Load(ctx, m)
+		if err != nil {
+			return nil, errors.WithStack(err)
+		}
+
+		extensions = append(extensions, ext)
+	}
+
+	return extensions, nil
+}
+
+func (r *Registry) Plugins() []Plugin {
+	r.mutex.RLock()
+	defer r.mutex.RUnlock()
+
+	plugins := make([]Plugin, 0, len(r.plugins))
+	for _, p := range r.plugins {
+		plugins = append(plugins, p)
+	}
+
+	return plugins
+}
+
+type IteratorFunc func(plg Plugin) error
+
+func (r *Registry) Each(iterator IteratorFunc) error {
+	r.mutex.RLock()
+	defer r.mutex.RUnlock()
+
+	for _, p := range r.plugins {
+		if err := iterator(p); err != nil {
+			return errors.WithStack(err)
+		}
+	}
+
+	return nil
+}
+
+func NewRegistry() *Registry {
+	return &Registry{
+		plugins: make(map[string]Plugin),
+	}
+}

plugin/registry_test.go

@@ -0,0 +1,94 @@
+package plugin_test
+
+import (
+	"testing"
+
+	"github.com/pkg/errors"
+	"gitlab.com/wpetit/goweb/plugin"
+)
+
+type testPlugin struct {
+	name    string
+	version string
+}
+
+func (p *testPlugin) PluginName() string {
+	return p.name
+}
+
+func (p *testPlugin) PluginVersion() string {
+	return p.version
+}
+
+func (p *testPlugin) Foo() string {
+	return "bar"
+}
+
+func TestRegistryEach(t *testing.T) {
+	t.Parallel()
+
+	reg := plugin.NewRegistry()
+
+	plugins := []*testPlugin{
+		{"plugin.a", "0.0.0"},
+		{"plugin.b", "0.0.1"},
+	}
+
+	for _, p := range plugins {
+		reg.Add(p)
+	}
+
+	total := 0
+
+	err := reg.Each(func(p plugin.Plugin) error {
+		total++
+
+		return nil
+	})
+	if err != nil {
+		t.Error(errors.WithStack(err))
+	}
+
+	if e, g := len(plugins), total; e != g {
+		t.Errorf("total: expected '%v', got '%v'", e, g)
+	}
+}
+
+func TestRegistryGet(t *testing.T) {
+	t.Parallel()
+
+	reg := plugin.NewRegistry()
+
+	plugins := []*testPlugin{
+		{"plugin.a", "0.0.0"},
+		{"plugin.b", "0.0.1"},
+	}
+
+	for _, p := range plugins {
+		reg.Add(p)
+	}
+
+	for _, p := range plugins {
+		plugin, err := reg.Get(p.name)
+		if err != nil {
+			t.Error(errors.WithStack(err))
+		}
+
+		if e, g := p.name, plugin.PluginName(); e != g {
+			t.Errorf("plugin.PluginName(): expected '%v', got '%v'", e, g)
+		}
+
+		if e, g := p.version, plugin.PluginVersion(); e != g {
+			t.Errorf("plugin.PluginVersion(): expected '%v', got '%v'", e, g)
+		}
+	}
+
+	p, err := reg.Get("plugin.c")
+	if !errors.Is(err, plugin.ErrPluginNotFound) {
+		t.Errorf("err: expected '%v', got '%v'", plugin.ErrPluginNotFound, err)
+	}
+
+	if p != nil {
+		t.Errorf("reg.Get(\"plugin.c\"): expected '%v', got '%v'", nil, p)
+	}
+}

service/build/info.go

@@ -0,0 +1,7 @@
+package build
+
+type Info struct {
+	ProjectVersion string
+	GitRef         string
+	BuildDate      string
+}

service/build/service.go

@@ -0,0 +1,43 @@
+package build
+
+import (
+	"github.com/pkg/errors"
+	"gitlab.com/wpetit/goweb/service"
+)
+
+const (
+	ServiceName service.Name = "build"
+)
+
+func ServiceProvider(projectVersion, gitRef, buildDate string) service.Provider {
+	info := &Info{projectVersion, gitRef, buildDate}
+
+	return func(ctn *service.Container) (interface{}, error) {
+		return info, nil
+	}
+}
+
+// From retrieves the build informations in the given service container
+func From(container *service.Container) (*Info, error) {
+	service, err := container.Service(ServiceName)
+	if err != nil {
+		return nil, errors.Wrapf(err, "error while retrieving '%s' service", ServiceName)
+	}
+
+	srv, ok := service.(*Info)
+	if !ok {
+		return nil, errors.Errorf("retrieved service is not a valid '%s' service", ServiceName)
+	}
+
+	return srv, nil
+}
+
+// Must retrieves the user repository in the given service container or panic otherwise
+func Must(container *service.Container) *Info {
+	srv, err := From(container)
+	if err != nil {
+		panic(err)
+	}
+
+	return srv
+}

service/template/data.go

@@ -1,5 +1,12 @@
 package template
 
+import (
+	"net/http"
+
+	"gitlab.com/wpetit/goweb/service"
+	"gitlab.com/wpetit/goweb/service/build"
+)
+
 // Data is some data to inject into the template
 type Data map[string]interface{}
 
@@ -17,3 +24,14 @@ func Extend(data Data, extensions ...DataExtFunc) (Data, error) {
 	}
 	return data, nil
 }
+
+func WithBuildInfo(w http.ResponseWriter, r *http.Request, ctn *service.Container) DataExtFunc {
+	return func(data Data) (Data, error) {
+		info, err := build.From(ctn)
+		if err != nil {
+			return nil, err
+		}
+		data["BuildInfo"] = info
+		return data, nil
+	}
+}

service/template/service.go

@@ -1,6 +1,7 @@
 package template
 
 import (
+	"io"
 	"net/http"
 
 	"github.com/pkg/errors"
@@ -13,6 +14,7 @@ const ServiceName service.Name = "template"
 // Service is a templating service
 type Service interface {
 	RenderPage(w http.ResponseWriter, templateName string, data interface{}) error
+	Render(w io.Writer, templateName string, data interface{}) error
 }
 
 // From retrieves the template service in the given container

session/gorilla/cookie.go

@@ -10,20 +10,23 @@ import (
 // CreateCookieSessionStore creates and returns a new cookie session store
 // with random authentication and encryption keys
 func CreateCookieSessionStore(authKeySize, encryptKeySize int, defaultOptions *sessions.Options) (sessions.Store, error) {
-	authenticationKey, err := generateRandomBytes(authKeySize)
+	authenticationKey, err := GenerateRandomBytes(authKeySize)
 	if err != nil {
 		return nil, errors.Wrap(err, "error while generating cookie authentication key")
 	}
-	encryptionKey, err := generateRandomBytes(encryptKeySize)
+
+	encryptionKey, err := GenerateRandomBytes(encryptKeySize)
 	if err != nil {
 		return nil, errors.Wrap(err, "error while generating cookie encryption key")
 	}
+
 	store := sessions.NewCookieStore(authenticationKey, encryptionKey)
 	store.Options = defaultOptions
+
 	return store, nil
 }
 
-func generateRandomBytes(n int) ([]byte, error) {
+func GenerateRandomBytes(n int) ([]byte, error) {
 	b := make([]byte, n)
 	_, err := rand.Read(b)
 	if err != nil {

template/html/loader.go

@@ -0,0 +1,56 @@
+package html
+
+import (
+	"io/ioutil"
+	"path/filepath"
+)
+
+type Loader interface {
+	Load(*TemplateService) error
+}
+
+type DirectoryLoader struct {
+	rootDir string
+}
+
+func (l *DirectoryLoader) Load(srv *TemplateService) error {
+	blockFiles, err := filepath.Glob(filepath.Join(l.rootDir, "blocks", "*.tmpl"))
+	if err != nil {
+		return err
+	}
+
+	for _, f := range blockFiles {
+		blockContent, err := ioutil.ReadFile(f)
+		if err != nil {
+			return err
+		}
+
+		blockName := filepath.Base(f)
+		srv.AddBlock(blockName, string(blockContent))
+	}
+
+	layoutFiles, err := filepath.Glob(filepath.Join(l.rootDir, "layouts", "*.tmpl"))
+	if err != nil {
+		return err
+	}
+
+	// Generate our templates map from our layouts/ and blocks/ directories
+	for _, f := range layoutFiles {
+		templateData, err := ioutil.ReadFile(f)
+		if err != nil {
+			return err
+		}
+
+		templateName := filepath.Base(f)
+
+		if err := srv.LoadLayout(templateName, string(templateData)); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func NewDirectoryLoader(rootDir string) *DirectoryLoader {
+	return &DirectoryLoader{rootDir}
+}

template/html/option.go

@@ -6,6 +6,7 @@ import "html/template"
 type Options struct {
 	Helpers  template.FuncMap
 	PoolSize int
+	DevMode  bool
 }
 
 // OptionFunc configures options for the template service
@@ -48,6 +49,14 @@ func WithPoolSize(size int) OptionFunc {
 	}
 }
 
+// WithDevMode configures the template service
+// to use the development mode (auto reload of templates).
+func WithDevMode(enabled bool) OptionFunc {
+	return func(opts *Options) {
+		opts.DevMode = enabled
+	}
+}
+
 func defaultOptions() *Options {
 	options := &Options{}
 	funcs := []OptionFunc{

template/html/provider.go

@@ -4,9 +4,9 @@ import "gitlab.com/wpetit/goweb/service"
 
 // ServiceProvider returns a service.Provider for the
 // the HTML template service implementation
-func ServiceProvider(templateDir string, funcs ...OptionFunc) service.Provider {
-	templateService := NewTemplateService(funcs...)
-	err := templateService.LoadTemplatesDir(templateDir)
+func ServiceProvider(loader Loader, funcs ...OptionFunc) service.Provider {
+	templateService := NewTemplateService(loader, funcs...)
+	err := templateService.Load()
 	return func(container *service.Container) (interface{}, error) {
 		if err != nil {
 			return nil, err

template/html/service.go

@@ -1,91 +1,79 @@
 package html
 
 import (
-	"fmt"
+	"errors"
 	"html/template"
-	"io/ioutil"
+	"io"
 	"net/http"
-	"path/filepath"
+	"sync"
 
 	"github.com/oxtoacart/bpool"
 )
 
+var (
+	ErrLayoutNotFound = errors.New("layout not found")
+)
+
 // TemplateService is a template/html based templating service
 type TemplateService struct {
-	templates map[string]*template.Template
-	pool      *bpool.BufferPool
-	helpers   template.FuncMap
+	mutex   sync.RWMutex
+	blocks  map[string]string
+	layouts map[string]*template.Template
+	loader  Loader
+	pool    *bpool.BufferPool
+	helpers template.FuncMap
+	devMode bool
 }
 
-func (t *TemplateService) LoadLayout(name string, layout string, blocks []string) error {
+func (t *TemplateService) AddBlock(name string, blockContent string) {
+	t.mutex.Lock()
+	defer t.mutex.Unlock()
+
+	t.blocks[name] = blockContent
+}
+
+func (t *TemplateService) LoadLayout(name string, layoutContent string) error {
 	tmpl := template.New(name)
 	tmpl.Funcs(t.helpers)
 
-	for _, b := range blocks {
+	t.mutex.RLock()
+	for _, b := range t.blocks {
 		if _, err := tmpl.Parse(b); err != nil {
+			t.mutex.RUnlock()
 			return err
 		}
 	}
+	t.mutex.RUnlock()
 
-	tmpl, err := tmpl.Parse(layout)
+	tmpl, err := tmpl.Parse(layoutContent)
 	if err != nil {
 		return err
 	}
 
-	t.templates[name] = tmpl
+	t.mutex.Lock()
+	t.layouts[name] = tmpl
+	t.mutex.Unlock()
 
 	return nil
 }
 
-// LoadTemplatesDir loads the templates used by the service
-func (t *TemplateService) LoadTemplatesDir(templatesDir string) error {
-
-	layoutFiles, err := filepath.Glob(filepath.Join(templatesDir, "layouts", "*.tmpl"))
-	if err != nil {
-		return err
-	}
-
-	blockFiles, err := filepath.Glob(filepath.Join(templatesDir, "blocks", "*.tmpl"))
-	if err != nil {
-		return err
-	}
-
-	blockTemplates := make([]string, 0, len(blockFiles))
-
-	for _, f := range blockFiles {
-		templateData, err := ioutil.ReadFile(f)
-		if err != nil {
-			return err
-		}
-
-		blockTemplates = append(blockTemplates, string(templateData))
-	}
-
-	// Generate our templates map from our layouts/ and blocks/ directories
-	for _, f := range layoutFiles {
-		templateData, err := ioutil.ReadFile(f)
-		if err != nil {
-			return err
-		}
-
-		templateName := filepath.Base(f)
-
-		if err := t.LoadLayout(templateName, string(templateData), blockTemplates); err != nil {
-			return err
-		}
-	}
-
-	return nil
-
+// Load parses templates via the configured template loader.
+func (t *TemplateService) Load() error {
+	return t.loader.Load(t)
 }
 
 // RenderPage renders a template to the given http.ResponseWriter
 func (t *TemplateService) RenderPage(w http.ResponseWriter, templateName string, data interface{}) error {
+	if t.devMode {
+		if err := t.loader.Load(t); err != nil {
+			return err
+		}
+	}
 
 	// Ensure the template exists in the map.
-	tmpl, ok := t.templates[templateName]
+	tmpl, ok := t.layouts[templateName]
 	if !ok {
-		return fmt.Errorf("the template '%s' does not exist", templateName)
+		return ErrLayoutNotFound
 	}
 
 	// Create a buffer to temporarily write to and check if any errors were encountered.
@@ -103,15 +91,45 @@ func (t *TemplateService) RenderPage(w http.ResponseWriter, templateName string,
 
 }
 
+// Render renders a layout to the given io.Writer.
+func (t *TemplateService) Render(w io.Writer, layoutName string, data interface{}) error {
+	if t.devMode {
+		if err := t.loader.Load(t); err != nil {
+			return err
+		}
+	}
+
+	// Ensure the template exists in the map.
+	tmpl, ok := t.layouts[layoutName]
+	if !ok {
+		return ErrLayoutNotFound
+	}
+
+	// Create a buffer to temporarily write to and check if any errors were encountered.
+	buf := t.pool.Get()
+	defer t.pool.Put(buf)
+
+	if err := tmpl.ExecuteTemplate(buf, layoutName, data); err != nil {
+		return err
+	}
+
+	_, err := buf.WriteTo(w)
+
+	return err
+}
+
 // NewTemplateService returns a new Service
-func NewTemplateService(funcs ...OptionFunc) *TemplateService {
+func NewTemplateService(loader Loader, funcs ...OptionFunc) *TemplateService {
 	options := defaultOptions()
 	for _, f := range funcs {
 		f(options)
 	}
 	return &TemplateService{
-		templates: make(map[string]*template.Template),
-		pool:      bpool.NewBufferPool(options.PoolSize),
-		helpers:   options.Helpers,
+		blocks:  make(map[string]string),
+		layouts: make(map[string]*template.Template),
+		pool:    bpool.NewBufferPool(options.PoolSize),
+		helpers: options.Helpers,
+		loader:  loader,
+		devMode: options.DevMode,
 	}
 }