Frontend/backend project structure

+ Base implementation of a differential synchronization based on Neil
  Fraser article/talk

See https://www.youtube.com/watch?v=S2Hp_1jqpY8

client/src/models/params.ts

@@ -0,0 +1,71 @@
+import { TaskCategory, TaskCategoryID } from "./task";
+import { Project } from "./project";
+
+export interface TaskCategoriesIndex {
+    [id: string]: TaskCategory
+}
+
+export interface TimeUnit {
+    label: string
+    acronym: string
+}
+
+export interface Params {
+    taskCategories: TaskCategoriesIndex
+    timeUnit: TimeUnit
+    currency: string
+    roundUpEstimations: boolean
+    hideFinancialPreviewOnPrint: boolean
+}
+
+export const defaults = {
+    taskCategories: {
+        "RQ15CD3iX1Ey2f9kat7tfLGZmUx9GGc15nS6A7fYtZv76SnS4": { 
+            id: "RQ15CD3iX1Ey2f9kat7tfLGZmUx9GGc15nS6A7fYtZv76SnS4", 
+            label: "Développement",
+            costPerTimeUnit: 500,
+        },
+        "QRdGS5Pr5si9SSjU84WAq19cjxQ3rUL71jKh8oHSMZSY4bBH9": { 
+            id: "QRdGS5Pr5si9SSjU84WAq19cjxQ3rUL71jKh8oHSMZSY4bBH9", 
+            label: "Conduite de projet",
+            costPerTimeUnit: 500,
+        },
+        "RPcqFMLdQrgBSomv7Sao7EQSb7on6rtjfDQK5JZNhNSg9DwEo": { 
+            id: "RPcqFMLdQrgBSomv7Sao7EQSb7on6rtjfDQK5JZNhNSg9DwEo", 
+            label: "Recette",
+            costPerTimeUnit: 500,
+        },
+    },
+    timeUnit: {
+        label: "jour/homme",
+        acronym: "j/h",
+    },
+    roundUpEstimations: true,
+    currency: "€ H.T.",
+    costPerTimeUnit: 500,
+    hideFinancialPreviewOnPrint: false,
+}
+
+export function getTimeUnit(project: Project): TimeUnit {
+    return project.params.timeUnit ? project.params.timeUnit : defaults.timeUnit;
+}
+
+export function getRoundUpEstimations(project: Project): boolean {
+    return project.params.hasOwnProperty("roundUpEstimations") ? project.params.roundUpEstimations : defaults.roundUpEstimations;
+}
+
+export function getCurrency(project: Project): string {
+    return project.params.currency ? project.params.currency : defaults.currency;
+}
+
+export function getTaskCategories(project: Project): TaskCategoriesIndex {
+    return project.params.taskCategories ? project.params.taskCategories : defaults.taskCategories;
+}
+
+export function getTaskCategoryCost(taskCategory: TaskCategory): number {
+    return taskCategory.hasOwnProperty("costPerTimeUnit") ? taskCategory.costPerTimeUnit : defaults.costPerTimeUnit;
+}
+
+export function getHideFinancialPreviewOnPrint(project: Project): boolean {
+  return project.params.hasOwnProperty("hideFinancialPreviewOnPrint") ? project.params.hideFinancialPreviewOnPrint : defaults.hideFinancialPreviewOnPrint;
+}

client/src/models/project.ts

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+import { Task, TaskCategory, TaskID } from './task';
+import { Params, defaults } from "./params";
+import { uuidV4 } from "../util/uuid";
+
+export type ProjectID = string;
+
+export interface Project {
+    id: ProjectID
+    label: string
+    description: string
+    tasks: Tasks
+    params: Params
+}
+
+export interface Tasks {
+    [id: string]: Task
+}
+
+export function newProject(id?: string): Project {
+    return {
+        id: id ? id : uuidV4(),
+        label: "",
+        description: "",
+        tasks: {},
+        params: {
+          ...defaults
+        },
+    };
+}

client/src/models/task.ts

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+import { uuidV4, base58UUID } from "../util/uuid"
+import { defaults } from "./params";
+
+export type TaskID = string
+
+export enum EstimationConfidence {
+    Optimistic = "optimistic",
+    Likely = "likely",
+    Pessimistic = "pessimistic"
+}
+
+export interface Task {
+    id: TaskID
+    label: string
+    category: TaskCategoryID
+    estimations: { [confidence in EstimationConfidence]: number }
+}
+
+export type TaskCategoryID = string
+
+export interface TaskCategory {
+    id: TaskCategoryID
+    label: string
+    costPerTimeUnit: number
+}
+
+export function newTask(label: string, category: TaskCategoryID): Task {
+  return {
+    id: base58UUID(),
+    label,
+    category,
+    estimations: {
+      [EstimationConfidence.Optimistic]: 0,
+      [EstimationConfidence.Likely]: 0,
+      [EstimationConfidence.Pessimistic]: 0,
+    }
+  };
+}
+
+export function createTaskCategory(): TaskCategory {
+  return {
+    id: base58UUID(),
+    costPerTimeUnit: defaults.costPerTimeUnit,
+    label: ""
+  };
+}