schedule/assets/js/timer.js

/* Creates a new Task object. */
function Task(id ,name, description) {
  this._name = name;
  this._taskid = id;
  this._description = description;
  this._state = Task.State.STOPPED;
  this._timeSpentInPreviousIterations = 0;
  this._startDate = 0;
  this._endDate = 0;
  this._currentIterationStartTime = 0;
  this._customTimeSpent = 0;
  this._onChange = null;
}

/* Possible task states. */
Task.State = {
  STOPPED: "stopped",
  RUNNING: "running"
}

Task.prototype = {
  /* Returns the task name. */
  getName:  function() {
    return this._name;
  },

  /* Returns the task description. */
  getDescription:  function() {
    if (this._description == "NaN") {
      this._description = "" 
    }
    return this._description;
  },

  /* Returns the task state. */
  getState: function() {
    return this._state;
  },

  /* Is the task stopped? */
  isStopped: function() {
    return this._state == Task.State.STOPPED;
  },

  /* Is the task running? */
  isRunning: function() {
    return this._state == Task.State.RUNNING;
  },

  /*
   * Sets the "onChange" event handler. The "onChange" event is fired when the
   * task is started, stopped, or reset.
   */
  setOnChange: function(onChange) {
    this._onChange = onChange;
  },

  /*
   * Returns the time spent on the task in the current work iteration. Works
   * correctly only when the task is running.
   */
  _getCurrentIterationTime: function() {
    return (new Date).getTime() - this._currentIterationStartTime;
  },

  /*
   * Returns the total time spent on the task. This includes time spent in
   * the current work iteration if the task is running.
   */
  getTimeSpent: function() {
    var result = this._timeSpentInPreviousIterations;
    if (this._state == Task.State.RUNNING) {
      result += this._getCurrentIterationTime();
    }
    return result;
  },

  /* Calls the "onChange" event handler if set. */
  _callOnChange: function() {
    if (typeof this._onChange == "function") {
      this._onChange();
    }
  },

  /* Starts a new task work iteration. */
  start: function() {
    if (this._state == Task.State.RUNNING) { return };
    if (this._startDate == 0) {this._startDate = new Date()}
    this._state = Task.State.RUNNING;
    this._currentIterationStartTime = (new Date).getTime();
    this._callOnChange();
  },

  /* Stops the current task work iteration. */
  stop: function() {
    if (this._state == Task.State.STOPPED) { return };

    this._state = Task.State.STOPPED;
    this._timeSpentInPreviousIterations += this._getCurrentIterationTime();
    this._currentIterationStartTime = 0;
    this._endDate = new Date();
    this._callOnChange();
  },

  /* Stops the current task work iteration and resets the time data. */
  reset: function() {
    this.stop();
    this._timeSpentInPreviousIterations = 0;
    this._callOnChange();
  },
  save: function(task){
    console.log(task)
   
    $.ajax({                                                            
        type: "POST",
        data: {
            taskname: task._name,
            taskid: task._taskid,
            description: task._description,
            start: task._startDate,
            end: task._endDate,
            duration: task._timeSpentInPreviousIterations,
        },
        url: "{{ path('app_timer_create') }}",
        success: function (response) {
          response=JSON.parse(response);
          if(response.return=="KO") {
            $("#dataTable_wrapper").append("<div class='alert alert-danger' style='margin: 5px 0px'>"+response.error+"</div>");
          }else{
            location.reload();
          }
        }
    });
  },
  /* Serializes the task into a string. */
  serialize: function() {
    /*
     * Originally, I wanted to use "toSource" and "eval" for serialization and
     * deserialization, but "toSource" is not supported by WebKit, so I resorted
     * to ugly hackery...
     */
    return [
      encodeURIComponent(this._name),
      this._state,
      this._timeSpentInPreviousIterations,
      this._currentIterationStartTime,
      this._startDate,
      this._endDate,
      this._taskid,
      this._description,
    ].join("&");
  },

  /* Deserializes the task from a string. */
  deserialize: function(serialized) {
    var parts = serialized.split("&");
    this._name                          = decodeURIComponent(parts[0]);
    this._state                         = parts[1];
    this._timeSpentInPreviousIterations = parseInt(parts[2]);
    this._currentIterationStartTime     = parseInt(parts[3]);
    this._startDate                     = parseInt(parts[4]);
    this._endDate                       = parseInt(parts[5]);
    this._taskid                        = parseInt(parts[6]);
    this._description                   = parseInt(parts[7]);

  }
}

/* ===== Tasks ===== */

/* The Tasks class represents a list of tasks. */

/* Creates a new Tasks object. */
function Tasks() {
  this._tasks = [];

  this._onAdd = null;
  this._onRemove = null;
}

Tasks.prototype = {
  /*
   * Sets the "onAdd" event handler. The "onAdd" event is fired when a task
   * is added to the list.
   */
  setOnAdd: function(onAdd) {
    this._onAdd = onAdd;
  },

  /*
   * Sets the "onRemove" event handler. The "onRemove" event is fired when a
   * task is removed from the list.
   */
  setOnRemove: function(onRemove) {
    this._onRemove = onRemove;
  },

  /* Returns the length of the task list. */
  length: function() {
    return this._tasks.length
  },

  /*
   * Returns index-th task in the list, or "undefined" if the index is out of
   * bounds.
   */
  get: function(index) {
    return this._tasks[index];
  },

  /*
   * Calls the callback function for each task in the list. The function is
   * called with three parameters - the task, its index and the task list
   * object. This is modeled after "Array.forEach" in JavaScript 1.6.
   */
  forEach: function(callback) {
    for (var i = 0; i < this._tasks.length; i++) {
      callback(this._tasks[i], i, this);
    }
  },

  /* Calls the "onAdd" event handler if set. */
  _callOnAdd: function(task) {
    if (typeof this._onAdd == "function") {
      this._onAdd(task);
    }
  },

  /* Adds a new task to the end of the list. */
  add: function(task) {
    this._tasks.push(task);
    this._callOnAdd(task);
  },

  /* Calls the "onRemove" event handler if set. */
  _callOnRemove: function(index) {
    if (typeof this._onRemove == "function") {
      this._onRemove(index);
    }
  },

  /*
   * Removes index-th task from the list. Does not do anything if the index
   * is out of bounds.
   */
  remove: function(index) {
    this._callOnRemove(index);
    this._tasks.splice(index, 1);
  },

  

  /* Serializes the list of tasks into a string. */
  serialize: function() {
    var serializedTasks = [];
    this.forEach(function(task) {
      serializedTasks.push(task.serialize());
    });
    return serializedTasks.join("|");
  },

  /* Deserializes the list of tasks from a string. */
  deserialize: function(serialized) {
    /*
     * Repeatedly use "remove" so the "onRemove" event is triggered. Do the same
     * with the "add" method below.
     */
    while (this._tasks.length > 0) {
      this.remove(0);
    }

    var serializedTasks = serialized.split("|");
    for (var i = 0; i < serializedTasks.length; i++) {
      var task = new Task(0 ,"", "");
      task.deserialize(serializedTasks[i]);
      this.add(task);
    }
  }
}

/* ===== Extensions ===== */

/*
 * Pads this string with another string on the left until the resulting string
 * has specified length. If the padding string has more than one character, the
 * resulting string may be longer than desired (the padding string is not
 * truncated and it is only prepended as a whole). Bad API, I know, but it's
 * good enough for me.
 */
String.prototype.pad = function(length, padding) {
  var result = this;
  while (result.length < length) {
    result = padding + result;
  }
  return result;
}

/* ===== Task List + DOM Storage ===== */

/* The list of tasks. */
var tasks = new Tasks();

/* The last value of the serialized task list string. */
var lastSerializedTasksString;

/*
 * The key under which the serialized task list string is stored in the DOM
 * Storage.
 */
var TASKS_DOM_STORAGE_KEY = "timerTasks";

/*
 * Returns DOM Storage used by the application, or "null" if the browser does
 * not support DOM Storage.
 */
function getStorage() {
  /*
   * HTML 5 says that the persistent storage is available in the
   * "window.localStorage" attribute, however Firefox implements older version
   * of the proposal, which uses "window.globalStorage" indexed by the domain
   * name. We deal with this situation here as gracefully as possible (i.e.
   * without concrete browser detection and with forward compatibility).
   *
   * For more information, see:
   *
   *   http://www.whatwg.org/specs/web-apps/current-work/#storage
   *   https://developer.mozilla.org/En/DOM/Storage
   */
  if (window.localStorage !== undefined) {
    return window.localStorage;
  } else if (window.globalStorage !== undefined) {
    return window.globalStorage[location.hostname];
  } else {
    return null;
  }
}

/*
 * Saves the task list into a DOM Storage. Also updates the value of the
 * "lastSerializedTasksString" variable.
 */
function saveTasks() {
  var serializedTasksString = tasks.serialize();
  getStorage()[TASKS_DOM_STORAGE_KEY] = serializedTasksString;
  lastSerializedTasksString = serializedTasksString;
}

/*
 * Loads the serialized task list string from the DOM Storage. Returns
 * "undefined" if the storage does not contain the string (this happens when
 * running the application for the first time).
 */
function loadSerializedTasksString() {
  var storedValue = getStorage()[TASKS_DOM_STORAGE_KEY];
  /*
   * The spec says "null" should be returned when the key is not found, but some
   * browsers return "undefined" instead. Maybe it was in some earlier version
   * of the spec (I didn't bother to check).
   */
  if (storedValue !== null && storedValue !== undefined && storedValue.length > 0) {
    /*
     * The values retrieved from "globalStorage" use one more level of
     * indirection.
     */
    return (window.localStorage === undefined) ? storedValue.value : storedValue;
  } else {
    return undefined;
  }
}

/*
 * Loads the task list from the DOM Storage. Also updates the value of the
 * "lastSerializedTasksString" variable.
 */
function loadTasks() {
  var serializedTasksString = loadSerializedTasksString();
  if (serializedTasksString !== undefined) {
    tasks.deserialize(serializedTasksString);
    lastSerializedTasksString = serializedTasksString;
  }
}

/*
 * Was the task list changed outside of the application? Detects the change
 * by comparing the current serialized task list string in the DOM Storage
 * with a kept old value.
 */
function tasksHaveChangedOutsideApplication() {
  var serializedTasksString = loadSerializedTasksString();
  if (serializedTasksString != lastSerializedTasksString) {
    return true
  }
  return false;
}

/* ===== View ===== */

/* Some time constants. */
var MILISECONDS_IN_SECOND = 1000;
var MILISECONDS_IN_MINUTE = 60 * MILISECONDS_IN_SECOND;
var MINUTES_IN_HOUR       = 60;

/* Formats the time in the H:MM format. */
function formatTime(time) {
  var timeInMinutes = time / MILISECONDS_IN_MINUTE;
  var hours = Math.floor(timeInMinutes / MINUTES_IN_HOUR);
  var minutes = Math.floor(timeInMinutes - hours * MINUTES_IN_HOUR);
  return hours + ":" + String(minutes).pad(2, "0");
}

/*
 * Computes the URL of the image in the start/stop link according to the task
 * state.
 */
function computeStartStopLinkImageUrl(state) {
  switch (state) {
    case Task.State.STOPPED:
      return "fa-play";
    case Task.State.RUNNING:
      return "fa-stop";
    default:
      throw "Invalid task state."
  }
}

/*
 * Builds the HTML element of the row in the task table corresponding to the
 * specified task and index.
 */
function buildTaskRow(task, index) {
  var result = $("<tr />");

  var startStopLink = $(
    "<a href='#' class='start-stop-link' title='Start/stop'>"
    + "<i class='fa " + computeStartStopLinkImageUrl(task.getState()) + "'></i>"

  );
  startStopLink.click(function() {
    switch (task.getState()) {
      case Task.State.STOPPED:
        task.start();
        break;
      case Task.State.RUNNING:
        task.stop();
        break;
      default:
        throw "Invalid task state."
    }
    saveTasks();
    return false;
  });

  var resetLink = $(
    "<a href='#' title='Reset'>"
    + "<i class='fa fa-undo'></i>"
  );
  resetLink.click(function() {
    task.reset();
    saveTasks();
    return false;
  });

  var deleteLink = $(
    "<a href='#' title='Delete' class='deletetask'>"
    + "<i class='fa fa-trash-alt' class='deletetask'></i>"

  );
  deleteLink.click(function() {
    if (confirm("Do you really want to delete task \"" + task.getName() + "\"?")) {
      tasks.remove(index);
      saveTasks();
    }
    return false;
  });

  var saveLink = $(
    "<a href='#' title='Save' class='savetask'>"
    + "<i class='fa fa-download' class='savetask'></i>"
  );
  saveLink.click(function() {
    tasks.remove(index);
    saveTasks();
    task.save(task);
    return false;
  });
  result
    .addClass("state-" + task.getState())
    .append($("<td class='task-name' />").text(task.getName()))
    .append($("<td class='task-description' />").text(task.getDescription()))
    .append($("<td class='task-time' />").text(formatTime(task.getTimeSpent())))
    .append($("<td class='task-actions' />")
      .append(startStopLink)
      .append("&nbsp;&nbsp;")
      .append(resetLink)
      .append("&nbsp;&nbsp;")
      .append(saveLink)
      .append("&nbsp;&nbsp;&nbsp;&nbsp;")
      .append(deleteLink)
    );

  return result;
}

/* Finds row with the specified index in the task table. */
function findRowWithIndex(index) {
  return $("#task-table").find("tr").slice(1).eq(index);
}

/*
 * Updates the row in the task table corresponding to a task according to
 * its state.
 */
function updateTaskRow(row, task) {
  if (task.isStopped()) {
    row.removeClass("state-running");
    row.addClass("state-stopped");
  } else if (task.isRunning()) {
    row.removeClass("state-stopped");
    row.addClass("state-running");
  }

  row.find(".task-time").text(formatTime(task.getTimeSpent()))

  row.find(".start-stop-link i").removeClass();
  row.find(".start-stop-link i").addClass("fa "+computeStartStopLinkImageUrl(task.getState()));
}

/* ===== Initialization ===== */

/* Initializes event handlers on the task list. */
function initializeTasksEventHandlers() {
  tasks.setOnAdd(function(task) {
    var row = buildTaskRow(task, tasks.length() - 1);
    $("#task-table").append(row);
    task.setOnChange(function() {
      updateTaskRow(row, task);
    });
  });

  tasks.setOnRemove(function(index) {
    findRowWithIndex(index).remove();
    if (tasks.length() == 1 ) {
      $( "#task-table" ).css({"display":"none"});
    }
  });
}

/* Initializes GUI event handlers. */
function initializeGuiEventHandlers() {
  $( "#addtimer" ).click(function() {
      displayTaskAdd();
  });
 
  $( "#timer-desc" ).keypress(function( event ) {
    if ( event.which == 13 ) {
      event.preventDefault();
      displayTaskAdd();
   }
  });

}
function displayTaskAdd() {
  $( "#task-table" ).css({"display":"inline"});
  var taskName = $("#timer-task option:selected").text();
  var taskId = $("#timer-task option:selected").val();
  var taskDesc = $("#timer-desc").val();

  var task = new Task(taskId, taskName, taskDesc);
  tasks.add(task);
  saveTasks();
  $("#timer-desc").val("");
}
/*
 * Initializes a timer used to update task times and detect changes in the
 * data stored in the DOM Storage.
 */
function initializeTimer() {
  setInterval(function() {
    tasks.forEach(function(task, index) {
      updateTaskRow(findRowWithIndex(index), task);
    });

    if (tasksHaveChangedOutsideApplication()) {
      loadTasks();
    }
  }, 10 * MILISECONDS_IN_SECOND);
}

/* Initializes the application. */
$(document).ready(function(){
  try {
    if (!getStorage()) {
      alert("Timer requires a browser with DOM Storage support, such as Firefox 3+ or Safari 4+.");
      return;
    }
  } catch (e) {
    alert("Timer does not work with file: URLs in Firefox.");
    return;
  }

  initializeTasksEventHandlers();
  loadTasks();
  initializeGuiEventHandlers();
  initializeTimer();
});