Cleanup: Change LogMostVisitedImpression|Navigation APIs to take an enum

chrome/browser/resources/local_ntp/most_visited_util.js

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 
 /**
  * @fileoverview Utilities for rendering most visited thumbnails and titles.
  */
 
 <include src="instant_iframe_validation.js">
 
 
+// TODO(treib): A number of things from this file (e.g. the "enums" below) are
+// duplicated in most_visited_single.js. Pull those out into a shared file.
+
+
 /**
  * The different types of events that are logged from the NTP.  This enum is
  * used to transfer information from the NTP javascript to the renderer and is
  * not used as a UMA enum histogram's logged value.
  * Note: Keep in sync with common/ntp_logging_events.h
  * @enum {number}
  * @const
  */
 var NTP_LOGGING_EVENT_TYPE = {
   // The suggestion is coming from the server.
@@ skipping 17 matching lines @@
   NTP_GRAY_TILE_FALLBACK: 7,
   // The visuals of that tile's fallback are handled externally.
   NTP_EXTERNAL_TILE_FALLBACK: 8,
   // The user moused over an NTP tile or title.
   NTP_MOUSEOVER: 9,
   // A NTP Tile has finished loading (successfully or failing).
   NTP_TILE_LOADED: 10,
 };
 
 /**
- * Type of the impression provider for a generic client-provided suggestion.
- * @type {string}
+ * The different sources that an NTP tile can have.
+ * Note: Keep in sync with common/ntp_logging_events.h
+ * @enum {number}
  * @const
  */
-var CLIENT_PROVIDER_NAME = 'client';
-
-/**
- * Type of the impression provider for a generic server-provided suggestion.
- * @type {string}
- * @const
- */
-var SERVER_PROVIDER_NAME = 'server';
+var NTPLoggingTileSource = {
+  CLIENT: 0,
+  SERVER: 1,
+};
 
 /**
  * The origin of this request.
  * @const {string}
  */
 var DOMAIN_ORIGIN = '{{ORIGIN}}';
 
 /**
  * Parses query parameters from Location.
  * @param {string} location The URL to generate the CSS url for.
@@ skipping 19 matching lines @@
 }
 
 
 /**
  * Creates a new most visited link element.
  * @param {Object} params URL parameters containing styles for the link.
  * @param {string} href The destination for the link.
  * @param {string} title The title for the link.
  * @param {string|undefined} text The text for the link or none.
  * @param {string|undefined} direction The text direction.
- * @param {string|undefined} provider A provider name (max 8 alphanumeric
- *     characters) used for logging. Undefined if suggestion is not coming from
- *     the server.
+ * @param {number} tileSource The source from NTPLoggingTileSource.
  * @return {HTMLAnchorElement} A new link element.
  */
-function createMostVisitedLink(params, href, title, text, direction, provider) {
+function createMostVisitedLink(
+    params, href, title, text, direction, tileSource) {
   var styles = getMostVisitedStyles(params, !!text);
   var link = document.createElement('a');
   link.style.color = styles.color;
   link.style.fontSize = styles.fontSize + 'px';
   if (styles.fontFamily)
     link.style.fontFamily = styles.fontFamily;
   if (styles.textAlign)
     link.style.textAlign = styles.textAlign;
   if (styles.textFadePos) {
     var dir = /^rtl$/i.test(direction) ? 'to left' : 'to right';
@@ skipping 34 matching lines @@
     var isServerSuggestion = 'url' in params;
 
     // Ping are only populated for server-side suggestions, never for MV.
     if (isServerSuggestion && params.ping) {
       generatePing(DOMAIN_ORIGIN + params.ping);
     }
 
     var ntpApiHandle = chrome.embeddedSearch.newTabPage;
     if ('pos' in params && isFinite(params.pos)) {
       ntpApiHandle.logMostVisitedNavigation(parseInt(params.pos, 10),
-                                            provider || '');
+                                            tileSource);
     }
 
     // Follow <a> normally, so transition type will be LINK.
   };
 
   link.addEventListener('click', navigateFunction);
   link.addEventListener('keydown', function(event) {
     if (event.keyCode == 46 /* DELETE */ ||
         event.keyCode == 8 /* BACKSPACE */) {
       event.preventDefault();
@@ skipping 98 matching lines @@
   var data;
   if (params.url) {
     // Means that the suggestion data comes from the server. Create data object.
     data = {
       url: params.url,
       largeIconUrl: params.liu || '',
       thumbnailUrl: params.tu || '',
       title: params.ti || '',
       direction: params.di || '',
       domain: params.dom || '',
-      provider: params.pr || SERVER_PROVIDER_NAME
+      tileSource: NTPLoggingTileSource.SERVER
     };
   } else {
     var apiHandle = chrome.embeddedSearch.searchBox;
     data = apiHandle.getMostVisitedItemData(params.rid);
     if (!data)
       return;
-    // Allow server-side provider override.
-    data.provider = params.pr || CLIENT_PROVIDER_NAME;
+    data.tileSource: NTPLoggingTileSource.CLIENT;
   }
 
   if (isFinite(params.dummy) && parseInt(params.dummy, 10)) {
     data.dummy = true;
   }
   if (/^javascript:/i.test(data.url) ||
-      /^javascript:/i.test(data.thumbnailUrl) ||
-      !/^[a-z0-9]{0,8}$/i.test(data.provider))
+      /^javascript:/i.test(data.thumbnailUrl))
     return;
   if (data.direction)
     document.body.dir = data.direction;
   fill(params, data);
 }
 
 
 /**
  * Sends a POST request to ping url.
  * @param {string} url URL to be pinged.
  */
 function generatePing(url) {
   if (navigator.sendBeacon) {
     navigator.sendBeacon(url);
   } else {
     // if sendBeacon is not enabled, we fallback for "a ping".
     var a = document.createElement('a');
     a.href = '#';
     a.ping = url;
     a.click();
   }
 }