/*




*/

/* CPSWikipageEditor

 let the user directly edit a wiki page

 o loadEditMode: switch the page in edit mode
 o saveEditMode: sends the content to the server
                 and upgrade the page
*/

var CPSWikiPageEditor = Class.create();

CPSWikiPageEditor.prototype = {
  initialize: function(container_id, content_id, server_getsource,
                       server_setsource, server_render, edit_button_id,
                       waiter) {

    if ($(container_id)) {
      this.container_id = container_id;
      this.content_id = content_id;
      this.server_getsource = server_getsource;
      this.server_setsource = server_setsource;
      this.server_render = server_render;
      this.edit_button_id = edit_button_id;
      this.waiter = waiter;
      $(this.edit_button_id).onclick = this.loadEditMode.bindAsEventListener(this);
      this.enabled = true;
    }
    else {
      this.enabled = false;
    }
  },

  loadEditMode: function() {
    if (this.enabled) {
      this.waitProcess();
      var loadEditModeResultBn = this.loadEditModeResult.bind(this);
      var options = {onComplete: loadEditModeResultBn};
      this.sender = new Ajax.Request(this.server_getsource, options);
    }
  },

  prepareEditContent: function(text) {
    var content = new Array();
    content.push('<textarea id="' + this.content_id + '"');
    content.push(' name="source" rows="30" cols="80"');
    content.push(' class="monospaceFont" style="width: 100%;">');
    content.push(text);
    content.push('</textarea>');
    return content.join("");
  },

  loadEditModeResult: function(originalRequest) {
    result = this.prepareEditContent(originalRequest.responseText);
    $(this.container_id).innerHTML = result;
    // change "edit" into "save"
    $(this.edit_button_id).onclick = this.saveEditMode.bindAsEventListener(this);
    $(this.edit_button_id).src = "wikipage_save.png"
    this.unWaitProcess();
  },

  waitProcess: function() {
    if ($(this.waiter)) {
      Effect.Appear($(this.waiter), {duration:0.5, queue:'end'});
      $(this.edit_button_id).style.visibility = 'hidden';
    }
  },

  unWaitProcess: function() {
    if ($(this.waiter)) {
      Effect.Fade($(this.waiter), {duration:0.5, queue:'end'});
      $(this.edit_button_id).style.visibility = 'visible';
    }
  },

  saveEditMode: function() {
    if (this.enabled) {
      this.waitProcess();
      var saveEditModeResultBn = this.saveEditModeResult.bind(this);
      var source = $(this.content_id).value;
      var params = new Array();
      params.push("source=" + encodeURIComponent(source));
      params = params.join("&");
      var options = {parameters: params, onComplete: saveEditModeResultBn};
      this.sender = new Ajax.Request(this.server_setsource, options);
    }
  },

  saveEditModeResult: function(originalRequest) {
    response = originalRequest.responseText;
    // XXX todo: pop an error if result is false
    this.reloadWikiPageContent();
  },

  reloadWikiPageContent: function() {
    var reloadWikiPageContentResultBn = this.reloadWikiPageContentResult.bind(this);
    var options = {onComplete: reloadWikiPageContentResultBn};
    this.sender = new Ajax.Request(this.server_render, options);
  },

  reloadWikiPageContentResult: function(originalRequest) {
    $(this.container_id).innerHTML = originalRequest.responseText;
    $(this.edit_button_id).onclick = this.loadEditMode.bindAsEventListener(this);
    $(this.edit_button_id).src = "wikipage_write.png";
    this.unWaitProcess();
  }
}

/* wiki */
var CPSWikiEditor = Class.create();

CPSWikiEditor.prototype = {

  initialize: function(server_addpage, server_render, wikicontent_id,
                       page_title, title_helper,
                       wikipage_title, waiter, add_button) {
    if ($(page_title) && $(add_button) && $(wikipage_title)) {
      this.server_addpage = server_addpage;
      this.page_title = page_title;
      this.title_helper = title_helper;
      this.wikipage_title = wikipage_title;
      this.wikicontent_id = wikicontent_id;
      this.waiter = waiter;
      this.server_render = server_render;
      this.enabled = true;
      this.add_button = add_button;
      $(this.add_button).onclick = this.seePageAdder.bindAsEventListener(this);
      $(this.wikipage_title).onkeyup = this.pageAdderkeyDown.bindAsEventListener(this);
    }
    else
      this.enabled = false;
  },

  waitProcess: function() {
    if ($(this.waiter)) {
      Effect.Appear($(this.waiter), {duration:0.2, queue:'end'});
    }
  },

  unWaitProcess: function() {
    if ($(this.waiter)) {
      Effect.Fade($(this.waiter), {duration:0.2, queue:'end'});
    }
  },

  hidePageAdder: function() {
    Effect.Fade($(this.page_title), {duration:0.5, queue:'end'});
  },

  seePageAdder: function() {
    Effect.Appear($(this.page_title), {duration:0.5, queue:'end'});
    $(this.wikipage_title).focus();
  },

  pageAdderkeyDown: function(event) {
    if (!event)
        event = window.event;
    switch (event.keyCode) {
      case 13:
        input_title = document.getElementById("wikipageTitle");
        this.addPage($(this.wikipage_title).value);
        break;
    default:
        this.seePageAdder();
        return false;
    }
  },

  addPage: function(name) {
    this.waitProcess();
    var addPageResultBn = this.addPageResult.bind(this);
    var params = "title=" + encodeURIComponent(name);
    var options = {parameters: params, onComplete: addPageResultBn};
    this.sender = new Ajax.Request(this.server_addpage, options);
  },

  addPageResult: function(originalRequest) {
    response = originalRequest.responseText;
    if (response=="OK") {
      this.reloadWikiContent();
      $(this.wikipage_title).value = '';
    }
    else
      alert("could not add the page");
  },

  reloadWikiContent: function() {
    var reloadWikiContentResultBn = this.reloadWikiContentResult.bind(this);
    var options = {onComplete: reloadWikiContentResultBn};
    this.sender = new Ajax.Request(this.server_render, options);
  },

  reloadWikiContentResult: function(originalRequest) {
    $(this.wikicontent_id).innerHTML = originalRequest.responseText;
    this.unWaitProcess();
    this.hidePageAdder();
  }
}


/* Common helpers */
function gotoUrl(dest) {
  self.location.href = dest;
}

function setCursor(obj) {
  var isIE = false;
  if (navigator.appName == "Microsoft Internet Explorer") {
     isIE = true;
  }

  // Change the mouse cursor to hand or pointer
  if (isIE) {
      obj.style.cursor = "hand";
  } else {
    obj.style.cursor = "pointer";
  }
}