discourse/app/assets/javascripts/discourse/models/action_summary.js

/**
  A data model for summarizing actions a user has taken, for example liking a post.

  @class ActionSummary
  @extends Discourse.Model
  @namespace Discourse
  @module Discourse
**/
Discourse.ActionSummary = Discourse.Model.extend({

  // Description for the action
  description: function() {
    var action = this.get('actionType.name_key');
    if (this.get('acted')) {
      if (this.get('count') <= 1) {
        return I18n.t('post.actions.by_you.' + action);
      } else {
        return I18n.t('post.actions.by_you_and_others.' + action, { count: this.get('count') - 1 });
      }
    } else {
      return I18n.t('post.actions.by_others.' + action, { count: this.get('count') });
    }
  }.property('count', 'acted', 'actionType'),

  canAlsoAction: Em.computed.and('can_act', 'actionType.notCustomFlag'),
  usersCollapsed: Em.computed.not('usersExpanded'),
  usersExpanded: Em.computed.gt('users.length', 0),

  // Remove it
  removeAction: function() {
    this.setProperties({
      acted: false,
      count: this.get('count') - 1,
      can_act: true,
      can_undo: false
    });

    if (this.get('usersExpanded')) {
      this.get('users').removeObject(Discourse.User.current());
    }
  },

  // Perform this action
  act: function(opts) {
    if (!opts) opts = {};

    var action = this.get('actionType.name_key');

    // Mark it as acted
    this.setProperties({
      acted: true,
      count: this.get('count') + 1,
      can_act: false,
      can_undo: true
    });

    if(action === 'notify_moderators' || action === 'notify_user') {
      this.set('can_undo',false);
      this.set('can_clear_flags',false);
    }

    // Add ourselves to the users who liked it if present
    if (this.get('usersExpanded')) {
      this.get('users').addObject(Discourse.User.current());
    }

    // Create our post action
    var actionSummary = this;

    return Discourse.ajax("/post_actions", {
      type: 'POST',
      data: {
        id: this.get('post.id'),
        post_action_type_id: this.get('id'),
        message: opts.message,
        take_action: opts.takeAction
      }
    }).then(null, function (error) {
      actionSummary.removeAction();
      var message = $.parseJSON(error.responseText).errors;
      bootbox.alert(message);
    });
  },

  // Undo this action
  undo: function() {
    this.removeAction();

    // Remove our post action
    return Discourse.ajax("/post_actions/" + (this.get('post.id')), {
      type: 'DELETE',
      data: {
        post_action_type_id: this.get('id')
      }
    });
  },

  clearFlags: function() {
    var actionSummary = this;
    return Discourse.ajax("/post_actions/clear_flags", {
      type: "POST",
      data: {
        post_action_type_id: this.get('id'),
        id: this.get('post.id')
      }
    }).then(function(result) {
      actionSummary.set('post.hidden', result.hidden);
      actionSummary.set('count', 0);
    });
  },

  loadUsers: function() {
    var actionSummary = this;
    Discourse.ajax("/post_actions/users", {
      data: {
        id: this.get('post.id'),
        post_action_type_id: this.get('id')
      }
    }).then(function (result) {
      var users = Em.A();
      actionSummary.set('users', users);
      _.each(result,function(user) {
        if (user.id === Discourse.User.currentProp('id')) {
          users.pushObject(Discourse.User.current());
        } else {
          users.pushObject(Discourse.User.create(user));
        }
      });
    });
  }
});