src/chrome/browser/resources/print_preview/data/invitation_store.js

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 cr.define('print_preview', function() {
   6   'use strict';
   7
   8   /**
   9    * Printer sharing invitations data store.
  10    * @param {!print_preview.UserInfo} userInfo User information repository.
  11    * @constructor
  12    * @extends {cr.EventTarget}
  13    */
  14   function InvitationStore(userInfo) {
  15     cr.EventTarget.call(this);
  16
  17     /**
  18      * User information repository.
  19      * @private {!print_preview.UserInfo}
  20      */
  21     this.userInfo_ = userInfo;
  22
  23     /**
  24      * Maps user account to the list of invitations for this account.
  25      * @private {!Object.<string, !Array.<!print_preview.Invitation>>}
  26      */
  27     this.invitations_ = {};
  28
  29     /**
  30      * Maps user account to the flag whether the invitations for this account
  31      * were successfully loaded.
  32      * @private {!Object.<string, print_preview.InvitationStore.LoadStatus_>}
  33      */
  34     this.loadStatus_ = {};
  35
  36     /**
  37      * Event tracker used to track event listeners of the destination store.
  38      * @private {!EventTracker}
  39      */
  40     this.tracker_ = new EventTracker();
  41
  42     /**
  43      * Used to fetch and process invitations.
  44      * @private {print_preview.CloudPrintInterface}
  45      */
  46     this.cloudPrintInterface_ = null;
  47
  48     /**
  49      * Invitation being processed now. Only one invitation can be processed at
  50      * a time.
  51      * @private {print_preview.Invitation}
  52      */
  53     this.invitationInProgress_ = null;
  54   };
  55
  56   /**
  57    * Event types dispatched by the data store.
  58    * @enum {string}
  59    */
  60   InvitationStore.EventType = {
  61     INVITATION_PROCESSED:
  62         'print_preview.InvitationStore.INVITATION_PROCESSED',
  63     INVITATION_SEARCH_DONE:
  64         'print_preview.InvitationStore.INVITATION_SEARCH_DONE'
  65   };
  66
  67   /**
  68    * @enum {number}
  69    * @private
  70    */
  71   InvitationStore.LoadStatus_ = {
  72     IN_PROGRESS: 1,
  73     DONE: 2,
  74     FAILED: 3
  75   };
  76
  77   InvitationStore.prototype = {
  78     __proto__: cr.EventTarget.prototype,
  79
  80     /**
  81      * @return {print_preview.Invitation} Currently processed invitation or
  82      *     {@code null}.
  83      */
  84     get invitationInProgress() {
  85       return this.invitationInProgress_;
  86     },
  87
  88     /**
  89      * @param {string} account Account to filter invitations by.
  90      * @return {!Array.<!print_preview.Invitation>} List of invitations for the
  91      *     {@code account}.
  92      */
  93     invitations: function(account) {
  94       return this.invitations_[account] || [];
  95     },
  96
  97     /**
  98      * Sets the invitation store's Google Cloud Print interface.
  99      * @param {!print_preview.CloudPrintInterface} cloudPrintInterface Interface
 100      *     to set.
 101      */
 102     setCloudPrintInterface: function(cloudPrintInterface) {
 103       this.cloudPrintInterface_ = cloudPrintInterface;
 104       this.tracker_.add(
 105           this.cloudPrintInterface_,
 106           cloudprint.CloudPrintInterface.EventType.INVITES_DONE,
 107           this.onCloudPrintInvitesDone_.bind(this));
 108       this.tracker_.add(
 109           this.cloudPrintInterface_,
 110           cloudprint.CloudPrintInterface.EventType.INVITES_FAILED,
 111           this.onCloudPrintInvitesDone_.bind(this));
 112       this.tracker_.add(
 113           this.cloudPrintInterface_,
 114           cloudprint.CloudPrintInterface.EventType.PROCESS_INVITE_DONE,
 115           this.onCloudPrintProcessInviteDone_.bind(this));
 116       this.tracker_.add(
 117           this.cloudPrintInterface_,
 118           cloudprint.CloudPrintInterface.EventType.PROCESS_INVITE_FAILED,
 119           this.onCloudPrintProcessInviteFailed_.bind(this));
 120     },
 121
 122     /** Initiates loading of cloud printer sharing invitations. */
 123     startLoadingInvitations: function() {
 124       if (!this.cloudPrintInterface_)
 125         return;
 126       if (!this.userInfo_.activeUser)
 127         return;
 128       if (this.loadStatus_.hasOwnProperty(this.userInfo_.activeUser)) {
 129         if (this.loadStatus_[this.userInfo_.activeUser] ==
 130             InvitationStore.LoadStatus_.DONE) {
 131           cr.dispatchSimpleEvent(
 132               this, InvitationStore.EventType.INVITATION_SEARCH_DONE);
 133         }
 134         return;
 135       }
 136
 137       this.loadStatus_[this.userInfo_.activeUser] =
 138           InvitationStore.LoadStatus_.IN_PROGRESS;
 139       this.cloudPrintInterface_.invites(this.userInfo_.activeUser);
 140     },
 141
 142     /**
 143      * Accepts or rejects the {@code invitation}, based on {@code accept} value.
 144      * @param {!print_preview.Invitation} invitation Invitation to process.
 145      * @param {boolean} accept Whether to accept this invitation.
 146      */
 147     processInvitation: function(invitation, accept) {
 148       if (!!this.invitationInProgress_)
 149         return;
 150       this.invitationInProgress_ = invitation;
 151       this.cloudPrintInterface_.processInvite(invitation, accept);
 152     },
 153
 154     /**
 155      * Removes processed invitation from the internal storage.
 156      * @param {!print_preview.Invitation} invitation Processed invitation.
 157      * @private
 158      */
 159     invitationProcessed_: function(invitation) {
 160       if (this.invitations_.hasOwnProperty(invitation.account)) {
 161         this.invitations_[invitation.account] =
 162             this.invitations_[invitation.account].filter(function(i) {
 163               return i != invitation;
 164             });
 165       }
 166       if (this.invitationInProgress_ == invitation)
 167         this.invitationInProgress_ = null;
 168     },
 169
 170     /**
 171      * Called when printer sharing invitations are fetched.
 172      * @param {Event} event Contains the list of invitations.
 173      * @private
 174      */
 175     onCloudPrintInvitesDone_: function(event) {
 176       this.loadStatus_[event.user] = InvitationStore.LoadStatus_.DONE;
 177       this.invitations_[event.user] = event.invitations;
 178
 179       cr.dispatchSimpleEvent(
 180           this, InvitationStore.EventType.INVITATION_SEARCH_DONE);
 181     },
 182
 183     /**
 184      * Called when printer sharing invitations fetch has failed.
 185      * @param {Event} event Contains the reason of failure.
 186      * @private
 187      */
 188     onCloudPrintInvitesFailed_: function(event) {
 189       this.loadStatus_[event.user] = InvitationStore.LoadStatus_.FAILED;
 190     },
 191
 192     /**
 193      * Called when printer sharing invitation was processed successfully.
 194      * @param {Event} event Contains detailed information about the invite and
 195      *     newly accepted destination.
 196      * @private
 197      */
 198     onCloudPrintProcessInviteDone_: function(event) {
 199       this.invitationProcessed_(event.invitation);
 200       cr.dispatchSimpleEvent(
 201           this, InvitationStore.EventType.INVITATION_PROCESSED);
 202     },
 203
 204     /**
 205      * Called when /printer call completes. Updates the specified destination's
 206      * print capabilities.
 207      * @param {Event} event Contains detailed information about the
 208      *     destination.
 209      * @private
 210      */
 211     onCloudPrintProcessInviteFailed_: function(event) {
 212       this.invitationProcessed_(event.invitation);
 213       // TODO: Display an error.
 214       cr.dispatchSimpleEvent(
 215           this, InvitationStore.EventType.INVITATION_PROCESSED);
 216     }
 217   };
 218
 219   // Export
 220   return {
 221     InvitationStore: InvitationStore
 222   };
 223 });