// ==UserScript==
// @name Google Play Review Rating Filter
// @version 1.1.1
// @description Adds checkboxes to Google Play to filter app reviews based on their star rating out of five
// @icon https://s2.googleusercontent.com/s2/favicons?domain=https%3A%2F%2Fplay.google.com
// @namespace http://www.qzdesign.co.uk/userscripts/
// @include https://play.google.com/*
// @include http://play.google.com/*
// @run-at document-end
// @require https://cdnjs.cloudflare.com/ajax/libs/jquery/1.12.4/jquery.min.js
// @grant none
// ==/UserScript==
//'use strict';
/// false = no debug logging, true = some debug logging, 2 = extra debug logging
var debug = false;
try {
if (debug) console.log('GPRRF included');
// Avoid any possible jQuery conflict
if (typeof this !== 'undefined') {
this.$ = this.jQuery = jQuery.noConflict(true);
}
/**
* Set up prototypal inheritance.
* @param sup `Function` that is the superclass's constructor
* @param methods Object whose properties are methods to set in the prototype
*/
Function.prototype.gprrfExtend = function(sup, methods) {
this.prototype = Object.create(sup.prototype);
this.prototype.constructor = this;
$.extend(this.prototype, methods);
};
/**
* Class for hooking `XMLHttpRequest`
*/
var XMLHttpRequestHook = (function() {
/**
* Constructor
* @param initData Object whose properties will be initially copied to the
* instance
*/
function XMLHttpRequestHook(initData) {
if (initData) {
$.extend(this, initData);
}
activeHooks.push(this);
}
/** Array of currently active `XMLHttpRequestHook` objects */
var activeHooks = [];
/** Stores the original `XMLHttpRequest.prototype.open` */
var xhrOpen = XMLHttpRequest.prototype.open;
/** Like `Object.getOwnPropertyDescriptor` but traverses prototype chain */
var getPropertyDescriptor = function(obj, prop) {
return Object.getOwnPropertyDescriptor(obj, prop) ||
getPropertyDescriptor(Object.getPrototypeOf(obj), prop);
};
/** Function to override `XMLHttpRequest.prototype.open` with */
var xhrOpenHook = function() {
if (debug > 1) console.log('XHR[%o] open(%o)', this, arguments);
if (debug > 1) console.log('activeHooks: %o', activeHooks);
// See if any active `XMLHttpRequestHook` will handle the request
for (var i = 0, l = activeHooks.length; i < l; ++i) {
var xhrHook = activeHooks[i];
// Prepend the `XMLHttpRequest` object to the arguments
if (xhrHook.open.bind(xhrHook, this).apply(void 0, arguments)) {
if (debug > 1) console.log('XHR hooked for this request');
return;
}
}
// Otherwise call the original `XMLHttpRequest` method
if (debug > 1) console.log('Passing on XHR request not hooked');
return xhrOpen.apply(this, arguments);
};
// Assign the replacement `XMLHttpRequest.prototype.open`...
// Handle running in a sandbox
var pluginWrappedXMLHttpRequest = typeof exportFunction !== 'undefined' && (
// Unified Script Injector
XMLHttpRequest.wrappedJSObject ||
// GreaseMonkey 4.x+
unsafeWindow && unsafeWindow !== window && unsafeWindow.XMLHttpRequest
);
if (pluginWrappedXMLHttpRequest) {
if (debug > 1) console.log('XMLHttpRequest wrapped by browser plugin');
pluginWrappedXMLHttpRequest.prototype.open = exportFunction(
xhrOpenHook,
pluginWrappedXMLHttpRequest.prototype
);
} else {
if (debug > 1) console.log('Modifying XMLHttpRequest directly (no sandbox)');
XMLHttpRequest.prototype.open = xhrOpenHook;
}
// Define `XMLHttpRequestHook` prototype methods
XMLHttpRequestHook.gprrfExtend(Object, {
/**
* This method is called in response to a call to
* `XMLHttpRequest.prototype.open()`. This default implementation hooks the
* request so that the `send()` and `done()` methods will be called
* accordingly, makes the `responseText`, `status` and `readyState`
* properties writable, calls the original
* `XMLHttpRequest.prototype.open()`, and returns `true`.
* Overridden implementations should return `false` and not call this
* implementation if the request should not be hooked.
*
* @param xhr The `XMLHttpRequest` object.
* The other parameters are as for `XMLHttpRequest.prototype.open`
*
* @return `true` if the request has been hooked and the original
* `XMLHttpRequest.prototype.open` should not now be called, `false`
* otherwise.
*/
open: function(xhr, method, url, async, user, password) {
try {
if (debug > 1) console.log('XHRH open(%o)', arguments);
var xhrHook = this;
/** Holder for `XMLHttpRequest` properties that will be overridden */
var xhrProps = {
// Store any value (or lack of) already set for `onreadystatechange`
onreadystatechange: xhr.onreadystatechange
};
// Store original `send` property (usually from the prototype)
xhr.orgSend = xhr.send;
// Replace `XMLHttpRequest.prototype.send` for this instance
xhr.send = function() {
if (debug > 1) console.log('XHR[%o] send(%o)', this, arguments);
// Prepend the `XMLHttpRequest` object to the arguments
return xhrHook.send.bind(xhrHook, this).apply(void 0, arguments);
};
// Set the `onreadystatechange` function before redefining the property
xhr.onreadystatechange = function() {
if (debug > 1) console.log('XHR[%o] orsc(%o)', this, arguments);
if (this.readyState === XMLHttpRequest.DONE && this.status === 200) {
// Prepend the `XMLHttpRequest` object to the arguments
return xhrHook.done.bind(xhrHook, this).apply(void 0, arguments);
}
// `xhr.onreadystatechange` will be the redefined property here
if (xhr.onreadystatechange) {
return xhr.onreadystatechange.apply(this, arguments);
}
};
// Redefine `onreadystatechange` to have the value in `xhrProps`.
// Make `responseText`, `status` and `readyState` properties writable.
var props = [
'onreadystatechange', 'responseText', 'status', 'readyState'
];
props.forEach(function(prop) {
var orgDescriptor = getPropertyDescriptor(xhr, prop);
Object.defineProperty(xhr, prop, {
get: function() {
if (prop in xhrProps) {
return xhrProps[prop];
} else if (orgDescriptor.get) {
return orgDescriptor.get.call(this);
} else {
return orgDescriptor.value;
}
},
set: function(v) {
if (debug > 1) console.log('set prop %s = %o', prop, v);
xhrProps[prop] = v;
},
configurable: true,
enumerable: true
});
});
// Handle running in a Sandbox (i.e. in Unified Script Injector)
if (xhr.wrappedJSObject && typeof exportFunction !== 'undefined') {
if (debug > 1) console.log('XHR object wrapped by browser plugin');
xhr.wrappedJSObject.send = exportFunction(
xhr.send,
xhr.wrappedJSObject
);
props.forEach(function(prop) {
var pd = getPropertyDescriptor(xhr, prop);
pd.set = exportFunction(pd.set, xhr.wrappedJSObject);
pd.get = exportFunction(pd.get, xhr.wrappedJSObject);
Object.defineProperty(xhr.wrappedJSObject, prop, pd);
});
}
// Call original `XMLHttpRequest.prototype.open` with first argument as
// `this` instead of being an argument
Function.prototype.call.apply(xhrOpen, arguments);
// The request has been hooked
return true;
}
catch (e) {
if (console && console.error) console.error('%o\n%o', e, e.stack);
return false;
}
},
/**
* Called in response to a call to `send` on an `XMLHttpRequest` object
* which was hooked by `XMLHttpRequestHook.prototype.open()`.
*
* @param xhr The `XMLHttpRequest` object.
* The other parameters are as for `XMLHttpRequest.prototype.send`
*/
send: function(xhr, data) {
if (debug > 1) console.log('XHRH send(%o)', arguments);
// Call original `xhr.send` with first argument as `this` instead of being
// an argument
return Function.prototype.call.apply(xhr.orgSend, arguments);
},
/**
* Called in response to a chrome call to `onreadystatechange` for an
* `XMLHttpRequest` object which was hooked by
* `XMLHttpRequestHook.prototype.open()` when the `readyState` is
* `XMLHttpRequest.DONE` and `status` is 200.
*
* If a content code has set an `onreadystatechange` function, this method
* calls it after setting the `readyState` to `DONE` and `status` to 200, so
* it can be called explicitly to return a response after setting the
* `responseText` property.
*
* @param xhr The `XMLHttpRequest` object.
*/
done: function(xhr) {
if (debug > 1) console.log('XHRH done(%o)', arguments);
xhr.status = 200;
xhr.readyState = XMLHttpRequest.DONE;
if (xhr.onreadystatechange) {
// Call original `xhr.onreadystatechange` with first argument as `this`
// instead of being an argument
return Function.prototype.call.apply(xhr.onreadystatechange, arguments);
}
},
/** Disable this hook */
destruct: function() {
activeHooks = activeHooks.filter(function(e) { return e !== this; });
}
});
return XMLHttpRequestHook;
})();
$(function() {
/**
* Constructs a query string from an object's properties. Like
* `jQuery.param()` but does not use `encodeURIComponent`, instead assuming
* properties and values are already suitably URI-encoded. Google does not
* expect spaces encoded as plus signs which is what it gets when
* `jQuery.post()` is called with `data` as an object.
*/
function param(obj) {
var params = [];
for (var k in obj) {
if (obj.hasOwnProperty(k)) {
params.push(k + '=' + obj[k]);
}
}
return params.join('&');
}
/**
* Perform the reverse of `param()`, i.e. construct object from query string
*/
function deparam(queryString) {
var obj = {};
queryString.split('&').forEach(function(param) {
var parts = param.split('=');
var k = parts.shift();
obj[k] = parts.join('='); // join in case of stray '='
});
return obj;
}
/**
* Identity function. Useful for `Array.prototype.some` and
* `Array.prototype.every` when used on an array of booleans.
*/
function identityFunction(v) { return v; }
/**
* Add the checkboxes to the UI for selecting which review ratings to filter.
* Grab the total review count from the page.
*/
function initialize() {
totalNumReviews = +$('span.reviews-num').text().replace(/[,.]/g, '');
if (debug) console.log('Total number of reviews: %d', totalNumReviews);
if ($ratingsFilters) {
$ratingsFilters.remove();
}
$ratingsFilters = $('<div class="review-filter"/>')
.appendTo('div.review-filters')
.change(function() {
// Trigger a click on the currently selected sort order item to get
// Google's script to fetch reviews afresh
$('.id-review-sort-filter .dropdown-child.selected').click();
});
for (var i = 1; i <= 5; ++i) {
$('<label/>')
.text(i + '*')
.prepend($('<input/>').attr({
type: 'checkbox',
id: 'review-filter-' + i + '-star',
checked: ''
}))
.appendTo($ratingsFilters);
}
}
/**
* Extend `XMLHttpRequestHook` to only hook POST requests in which the path
* part of the URL matches a specific string
*
* @param urlPath string which the path part of the URL must match
* @param initData instance data and methods to set as properties
*/
function GooglePlayXMLHttpRequestHook(urlPath, initData) {
XMLHttpRequestHook.call(this, initData);
this.urlPath = urlPath;
}
// Define `GooglePlayXMLHttpRequestHook` prototype methods
GooglePlayXMLHttpRequestHook.gprrfExtend(XMLHttpRequestHook, {
/**
* @return `true` if the request should be hooked.
* Parameters as for `open`.
*/
hook: function(xhr, method, url) {
return method === 'POST' && url &&
this.urlPath ===
url.replace(/^(?:https?:)?\/\/play\.google\.com/, '').split('?', 1)[0]
;
},
open: function(xhr, method, url) {
return this.hook.apply(this, arguments) &&
XMLHttpRequestHook.prototype.open.apply(this, arguments)
;
}
});
/** The total number of reviews */
var totalNumReviews;
/** jQuery object for element containing rating filter checkboxes */
var $ratingsFilters;
/** The main `XMLHttpRequestHook` for marshalling review data */
var getReviewsHook = new GooglePlayXMLHttpRequestHook('/store/getreviews', {
/**
* Array of Objects containing data about each pending request. Each object
* has the following properties:
* - `pageNum`: The requested page number of the paged data;
* - `postParams`: The parameters that are sent in the POST request body to
* Google Play, but without the `pageNum` parameter;
* - `filters`: Array of booleans indexed by 'star rating' indicating
* whether reviews with this rating should be included in the results;
* - `xhr`: The `XMLHttpRequest` object for the request;
* - `fullDataKey`: Property key for `data` where data from unfiltered
* results obtained from Google is stored per-page;
* - `filteredDataKey`: Property key for `filteredData` where data about the
* results obtained from Google, with the selected filters applied, is
* stored per-page.
*/
pendingRequests: [],
/**
* Object whose property keys are a serialized representation of request
* parameters without the page number or any rating filter selection, and
* whose values are an array of objects, indexed by page number, containing
* review data retrieved via AJAX.
*/
data: {},
/**
* Object whose property keys are a serialized representation of request
* parameters, including rating filter selections, but without the page
* number, and whose values are an array of objects, indexed by page number,
* containing review data retrieved via AJAX filtered according to rating.
*/
filteredData: {},
/**
* Grab the current set of rating filters selected in the UI.
* Don't bother hooking the request if all ratings selected.
* Store the URL to use for internal AJAX requests.
*/
hook: function(xhr, method, url) {
if (GooglePlayXMLHttpRequestHook.prototype.hook.apply(this, arguments)) {
if (/^([a-z]+:)?\/\//.test(url)) {
/** URL to use for internal AJAX requests */
this.requestURL = url;
} else {
// `url` does not include host
var origin = location.protocol + '//' + location.hostname +
(location.port ? ':' + location.port : '');
if (url[0] === '/') {
this.requestURL = origin + url;
} else {
this.requestURL =
origin + location.pathname.replace(/[^\/]+$/, '') + url;
}
}
// Which filters are selected?
var filters = this.filters = [];
$ratingsFilters.find('input').each(function() {
filters[+(/^review-filter-(\d)-star$/.exec(this.id)[1])] =
this.checked;
});
return !filters.every(identityFunction);
} else {
return false;
}
},
/**
* If the request is for review data, and is not an internal request made by
* this script, create a pending request and then process pending requests
* instead of calling `XMLHttpRequest.prototype.send()`.
*/
send: function(xhr, data) {
try {
if (data) {
var postParams = deparam(data);
if (postParams.gprrfInternal) {
// Internal request by this script
if (debug > 1) console.log('Not hooking internal XHR request');
delete postParams.gprrfInternal;
return GooglePlayXMLHttpRequestHook.prototype.send.call(
this,
xhr,
param(postParams)
);
} else {
// Create a new request
var rq = {
pageNum: +postParams.pageNum,
postParams: postParams,
filters: this.filters,
xhr: xhr
};
// Choose data keys unique to the set of parameters
delete postParams.pageNum;
var dataKeyParts = [];
Object.keys(postParams).sort().forEach(function (key) {
dataKeyParts.push(key + '=' + postParams[key]);
});
rq.fullDataKey = this.lastDataKey = dataKeyParts.join('&');
rq.filteredDataKey =
rq.fullDataKey + '&' + JSON.stringify(rq.filters);
this.data[rq.fullDataKey] = this.data[rq.fullDataKey] || [];
this.filteredData[rq.filteredDataKey] =
this.filteredData[rq.filteredDataKey] || [];
// Add request as pending and process, but do not call super:
// `done()` will be called directly when the data is ready.
this.pendingRequests.push(rq);
if (debug) console.log('New request: %o', rq);
return this.processPendingRequests();
}
}
// Call super
return GooglePlayXMLHttpRequestHook.prototype.send.apply(
this,
arguments
);
} catch (e) {
if (console && console.error) console.error('%o\n%o', e, e.stack);
}
},
/**
* Process all pending requests. When there are no pending requests,
* possibly reclaim memory by removing obsolete data.
*/
processPendingRequests: function() {
this.pendingRequests = this.pendingRequests.filter(
this.processRequest,
this
);
if (!this.pendingRequests.length) {
// Reclaim memory by discarding data obtained with different parameters
[this.data, this.filteredData].forEach(function(d) {
for (var k in d) {
if (k.substr(0, this.lastDataKey.length) !== this.lastDataKey) {
if (debug) console.log('Removing data with key %s', k);
delete d[k];
}
}
}, this);
}
},
/**
* Process a request. If there is enough data to satisfy the request,
* `done()` will be called with responseText set to the result, otherwise
* more data will be requested via AJAX.
*
* @param rq Object containing data about the request
*
* @return `true` if the request is still pending, `false` if it is complete
* or has failed (so the method can be used with `Array.prototype.filter`).
*/
processRequest: function(rq) {
function debugInfo() {
return 'spn=' + srcPageNum + ' dpn=' + destPageNum +
' dprc=' + destPageReviewCount + ' dppc=' + destPagePageCount;
}
try {
// Iterate through source pages working out how many are needed to get
// enough reviews on each destination page. Request source page data as
// required. When there is enough data to return for the requested
// destination page, return it. This involves iterating at least to the
// next page to determine if the requested page would be the last.
// This is slightly inefficient because after data is requested, the
// iteration will begin at the start again when it is received.
var srcPageNum = 0;
var destPageNum = 0;
var destPageReviewCount = 0;
var destPagePageCount = 0;
var nodesToInclude = [];
for (;;) {
var prevSrcPageData = srcPageData;
var srcPageData = this.getFilteredSrcPageData(rq, srcPageNum);
if (!srcPageData) {
if (debug) console.log('requested more data: %s', debugInfo());
return true; // Data has been requested, come back when it arrives
}
// Update counts for current destination page
destPageReviewCount += srcPageData.numReviews;
++destPagePageCount;
if (debug > 1) console.log('in loop: %s', debugInfo());
// Include filtered nodes if destination page is requested page
if (destPageNum === rq.pageNum) {
Array.prototype.push.apply(nodesToInclude, srcPageData.nodes);
}
// Advance to next destination page if enough reviews found for
// current:
// - Try to get at least 3 reviews;
// - On the first page, aim for more than will fit on the screen to
// avoid a Google bug where the next page is immediately requested
// but the requested page number is one after the last page that
// was requested for the previous result set;
// - If there is at least one review, don't request more than 5 pages
// worth of data looking for more (too many rapid requests may
// trigger a temporary IP ban by Google);
// - Bail after 10 pages of data have not yielded any reviews, for the
// same reason;
if (
destPageReviewCount >= (destPageNum === 0 ? 7 : 3) ||
destPageReviewCount && destPagePageCount >= 5 ||
destPagePageCount >= 10
) {
if (debug) console.log('next dest page: %s', debugInfo());
++destPageNum;
destPageReviewCount = 0;
destPagePageCount = 0;
}
// Done?
var anyFilter = anyFilter || rq.filters.some(identityFunction);
if (
// End if there are no more source pages
!srcPageData.fullData.numReviews ||
srcPageData.fullData.responseCode == 2 ||
// End if on or past a non-empty destination page after the one
// requested
destPageNum > rq.pageNum + 1 ||
destPageNum > rq.pageNum && destPageReviewCount ||
// End if all filters unchecked.
// Wait until now so that there is a JSON data template to use.
!anyFilter
) {
break;
}
// Advance to next source page
if (rq.postParams.reviewSortOrder == 1 && !srcPageData.numReviews) {
// No reviews on this page, and sorting by rating.
// Binary search to find next page with reviews.
// What rating to look for next?
var ratingSought = 0;
for (var i = 1; !srcPageData.fullData.hasRating[i] && i <= 5; ++i) {
if (rq.filters[i]) {
ratingSought = i;
}
}
var pageBefore = 0;
var pageAfter = Math.floor(
(totalNumReviews - 1) /
this.data[rq.fullDataKey][0].numReviews + 1
);
var pageOutOfRange = false;
while (pageBefore + 1 < pageAfter) {
// Try to get there more quickly if last page out of range
// - there could be millions of reviews but only a few in the set
var midPage = pageOutOfRange && pageBefore + 3 < pageAfter
? Math.floor((pageAfter + pageBefore * 3) / 4)
: Math.floor((pageAfter + pageBefore) / 2);
var midPageData = this.getFilteredSrcPageData(rq, midPage);
if (!midPageData) {
return true; // Data has been requested, come back later
}
pageOutOfRange = !midPageData.fullData.numReviews;
if (pageOutOfRange) {
pageAfter = midPage;
} else {
// If there are ratings equal or below the desired rating,
// the mid page is after the sought page
for (var i = 1; i <= ratingSought; ++i) {
if (midPageData.fullData.hasRating[i]) {
pageAfter = midPage;
break;
}
}
if (pageAfter !== midPage) {
pageBefore = midPage;
}
}
}
if (debug) console.log('spn: %d -> %d', srcPageNum, pageAfter);
if (debug) console.assert(pageAfter > srcPageNum, 'Error!');
srcPageNum = pageAfter;
} else {
++srcPageNum;
}
}
// Send the response to the content code...
if (debug > 1) console.log('Delivering response to web page...');
// Need to indicate if this is the last page.
var isLastPage = destPageNum <= rq.pageNum ||
destPageNum <= rq.pageNum + 1 && !destPageReviewCount;
// Use some data obtained from Google as a template, so the response is
// as consistent as possible with what is expected.
var templateSrcPageData = (
isLastPage && srcPageData.responseText || !prevSrcPageData
? srcPageData : prevSrcPageData
).fullData;
var jsonData = [[
templateSrcPageData.responseText, ///< "ecr"
// Ensure 2 is returned for the last page
isLastPage && templateSrcPageData.responseCode != 2
? 2 : templateSrcPageData.responseCode,
// Ensure something is returned if there are no reviews, otherwise
// the UI doesn't get updated
$('<body/>').append(
nodesToInclude.length || rq.pageNum
? $(nodesToInclude).clone()
: $('<p/>').text(
rq.postParams.reviewSortOrder == 1
? 'No matching reviews could be obtained'
: 'No reviews found'
)
).html(),
rq.pageNum
]];
if (debug) console.log('done: %s ilp=%o', debugInfo(), isLastPage);
if (debug) console.log(
'template=%o, nodes=%o, response=%o, this=%o',
templateSrcPageData, nodesToInclude, jsonData, this
);
// Inlcude the preceding junk ")]}'\n\n" in the response
rq.xhr.responseText =
templateSrcPageData.junkBefore + JSON.stringify(jsonData);
// Use `setTimeout` in case of immediate result in `send()`
setTimeout(this.done.bind(this, rq.xhr), 0);
// Request has been processed, remove it from 'pending' list
return false;
}
catch (e) {
if (console && console.error) console.error('%o\n%o', e, e.stack);
return false;
}
},
/**
* Obtain and cache data for a page of reviews with a particular set of
* parameters, filtered according to the requested ratings. If data is not
* yet available, it is requested via AJAX.
*
* @param rq An object containing parameters and details of the request
* @param pageNum The page index of the source data to return
*
* @return If the data is not yet available, the return value is undefined.
* Otherwise, an object with the following properties is returned:
* - `nodes`: An array of `HTMLElement` objects which are either reviews
* which pass the filters or developer replies thereof;
* - `numReviews`: The number of reviews in the filtered page data;
* - `fullData`: The unfiltered data, an object with these properties:
* - `$domFragment`: A jQuery object which contains one HTML element whose
* children are the reviews and developer replies;
* - `numReviews`: The number of reviews on this page;
* - `hasRating`: An array indexed by rating whose values are `true` if
* there are any reviews on the page with this rating; this information
* is used when binary-searching for the next page containing reviews
* that will pass filtering when reviews are sorted by rating;
* - `responseCode`: 1 = ok, 2 = last page, 3 = error, undefined if HTTP
* error or response not as expected;
* - `responseText`: Always seems to be "ecr";
* - `junkBefore`: All responses seem to be preceded with junk ")]}'\n\n".
*/
getFilteredSrcPageData: function(rq, pageNum) {
var data = this.data[rq.fullDataKey][pageNum];
if (data) {
var filteredData = this.filteredData[rq.filteredDataKey][pageNum];
if (!filteredData) {
filteredData = {
fullData: data,
nodes: [],
numReviews: 0
};
data.hasRating = data.hasRating || [];
data.$domFragment.find('div.current-rating').each(function() {
var $this = $(this);
var rating = Math.round(parseInt($this.css('width')) / 20);
data.hasRating[rating] = true;
if (rq.filters[rating]) {
// Include this review, and any developer reply
if (debug > 1) console.log('%d* review included', rating);
var $review = $this.closest('div.single-review');
Array.prototype.push.apply(
filteredData.nodes,
$review.add($review.next('div.developer-reply')).get()
);
++filteredData.numReviews;
}
});
if (debug) console.log(
'filtered data for page %d: %o',
pageNum, filteredData
);
this.filteredData[rq.filteredDataKey][pageNum] = filteredData;
}
return filteredData;
} else {
var jqPostParam = {
url: this.requestURL,
data: param($.extend({}, rq.postParams, {
pageNum: pageNum,
gprrfInternal: true ///< Flag not to hook this request
})),
dataType: 'text'
};
if (debug > 1) console.log(
'Doing POST for source page %d: %o', pageNum, jqPostParam
);
var jqXhr = $.post(jqPostParam);
if (debug > 1) {
jqXhr.done(function() { console.log('$.post succeeded'); })
.fail(function() { console.log('$.post failed'); });
}
jqXhr.always(this.receiveData.bind(this, rq.fullDataKey, pageNum));
}
},
/**
* Store data received via AJAX, then reprocess pending requests
*
* @param dataKey Serialized representation of the request parameters
* to use as the property key of data to set
* @param pageNum The source page number of the data
* @param data String containing the data received on success; on failure
* this will be a `jqXHR` object
*/
receiveData: function(dataKey, pageNum, data) {
var dataObj = {
// defaults in case of error
responseText: 'ecr',
responseCode: 3,
junkBefore: ''
};
if (debug > 1) console.log('receivedData: %o', data);
if (typeof data === 'string') {
var skipJunk = data.indexOf('[');
try {
var jsonData = JSON.parse(skipJunk ? data.substr(skipJunk) : data);
if (
jsonData.length > 0 &&
jsonData[0].length > 3 &&
jsonData[0][3] == pageNum
) {
dataObj.$domFragment = $('<body/>').html(jsonData[0][2]);
dataObj.responseText = jsonData[0][0]; // "ecr"
dataObj.responseCode = jsonData[0][1]; // 1 ok, 2 last page, 3 error
}
} catch (e) {
if (debug) console.error(e);
}
dataObj.junkBefore = data.substr(0, skipJunk); // ")]}'\n\n"
}
dataObj.$domFragment = dataObj.$domFragment || $([]);
dataObj.numReviews =
dataObj.$domFragment.find('div.single-review').length;
if (debug) console.log(
'received page %d, key %s: %o',
pageNum, dataKey, dataObj
);
this.data[dataKey][pageNum] = dataObj;
this.processPendingRequests();
}
});
/**
* Reinitialize when a new App page is loaded via AJAX
*/
var loadPageHook = new GooglePlayXMLHttpRequestHook('/store/apps/details', {
/**
* Hook if the request contains a URL parameter `psid` with value 2, which
* indicates a request for new App review content.
*/
hook: function(xhr, method, url) {
if (GooglePlayXMLHttpRequestHook.prototype.hook.apply(this, arguments)) {
var urlParts = url.split('?', 2);
if (debug) console.log(urlParts);
return urlParts.length > 1 && deparam(urlParts[1]).psid == 2;
} else {
return false;
}
},
done: function(xhr) {
if (debug) console.log(xhr.responseURL);
if (debug > 1) console.log(xhr.responseText);
GooglePlayXMLHttpRequestHook.prototype.done.apply(this, arguments);
initialize();
}
});
// Initialize UI and review count for the page when first loaded
initialize();
});
} catch (e) {
if (console && console.error) console.error(
'Error at line %d:\n%o\n%o', e.lineNumber, e, e.stack
);
}
