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service.js
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service.js
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/*
* Copyright 2005-2009 Jesse Andrews
*
* This file may be used under the terms of of the
* GNU General Public License Version 3 or later (the "GPL"),
* http://www.gnu.org/licenses/gpl.html
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*/
var BBSVC = {};
var DEBUG = true;
/************
* Constants
*/
function getSourcePref(name) {
return localStorage[name];
};
function log(str) {
console.log("BB", str);
}
/************
* Development Mode
*/
function getCustom() {}
/**********
* Caching
*/
var CACHE = (new function() {
var _store = {};
this.get = function(k) {
var item = _store[k];
if (item) {
// only cached for one hour (60*60*1000ms)
if ((new Date).getTime() - item.cached_at < 3600000) {
return item.value;
} else {
delete _store[k];
}
}
};
this.set = function(k,v) {
_store[k] = {value: v, cached_at: (new Date())};
};
this.test = function(){
this.set("works", 42);
if (CACHE.get("works") == 42) {
return 'pass';
}
else {
return 'fail';
}
}
});
BBSVC.cache = CACHE;
if (DEBUG) {
log("Testing CACHE: " + CACHE.test());
}
/***************
* ISBN Helpers
*/
var ISBN = {
trim: function(isbn) {
return isbn.toLowerCase().replace(/-/g,'').replace(/\s/g,'');
},
checksum10: function(isbn9) {
var isbn = ISBN.trim(isbn9);
if (isbn.match(/^\d{9}$/)) {
var checksum = 0;
for (var i=0; i<9; i++) {
checksum += isbn9[i] * (i+1);
}
checksum = checksum % 11;
if (checksum == 10) {
checksum = 'x';
}
return checksum;
}
},
validate10: function(isbn10) {
var isbn = ISBN.trim(isbn10);
if (isbn.match(/^\d{9}[0-9x]$/)) {
if (isbn[9] == ISBN.checksum10(isbn.slice(0,9))) {
return isbn;
}
}
},
checksum13: function(isbn12) {
var isbn = ISBN.trim(isbn12);
if (isbn.match(/^\d{12}$/)) {
var checksum = 0;
for (var i=0; i<12; i++) {
checksum += isbn[i] * (i%2 == 0 ? 1 : 3);
}
return (10 - (checksum % 10)) % 10;
}
},
validate13: function(isbn13) {
var isbn = ISBN.trim(isbn13);
if (isbn.match(/^\d{13}$/)) {
if (isbn13[12] == ISBN.checksum13(isbn.slice(0,12))) {
return isbn;
}
}
},
validate: function(isbn) {
isbn = ISBN.trim(isbn);
if (isbn.length == 13) {
return ISBN.validate13(isbn);
}
if (isbn.length == 10) {
return ISBN.validate10(isbn);
}
},
convert: function(isbnIn) {
var isbn;
if (isbn = ISBN.validate13(isbnIn)) {
if (isbn.slice(0,3) != '978') {
return; // perhaps return the ISBN13 instead of null?
}
isbn = isbn.slice(3,12);
return isbn + ISBN.checksum10(isbn);
}
if (isbn = ISBN.validate10(isbnIn)) {
isbn = '978' + isbn.slice(0,9);
return isbn + ISBN.checksum13(isbn);
}
},
replace: function(url, isbn) {
return url.replace('#{ISBN}', isbn.toLowerCase())
.replace('#{ISBN_UPCASE}', isbn.toUpperCase());
},
test: function(isbns) {
if (!isbns) {
isbns = ['9992158107','99921-58-10-7','9971502100','9604250590','0943396042','080442957x',
'097522980x','9780306406157','9780940016736','9780940016613'];
}
for (var i=0; i<isbns.length; i++) {
var isbn = ISBN.validate(isbns[i]);
if (!isbn) {
return 'fail validating ' + isbns[i];
}
if (isbn.length == 10) {
if (!ISBN.validate13(ISBN.convert(isbn))) {
return 'fail converting ' + isbn;
}
}
else {
if (isbn.slice(0,3) == '978' && !ISBN.validate10(ISBN.convert(isbn))) {
return 'fail converting ' + isbn;
}
}
}
return 'pass';
},
}
BBSVC.isbn = ISBN;
if (DEBUG) {
log("Testing ISBN: " + ISBN.test());
}
/****************
* STORE/LIBRARY site wapper
*/
function Site(data) {
if (!data) return;
this._data = data;
this.title = data.title;
this.name = data.name;
}
Site.prototype.url =
function site_url(isbn, affiliate) {
affiliate = true;
if (affiliate == null) {
affiliate = !(PREFS.getPrefType('disable_affiliate') &&
PREFS.getBoolPref('disable_affiliate'));
}
if (affiliate && this._data.affiliate_link) {
var link = this._data.affiliate_link;
}
else {
var link = this._data.link;
}
return ISBN.replace(link, isbn);
};
Site.prototype.active =
function site_active() {
return getSourcePref(this.kind + '.' + this.name);
};
Site.prototype.check =
function site_check(isbn, successCallback, failureCallback, forceQuery) {
var cacheKey = this.kind + ':' + this.name + ':' + isbn;
if (!forceQuery) {
var status = CACHE.get(cacheKey);
if (status !== undefined) {
return successCallback(status);
}
}
var inst = this; // closure
var source = this._data.query || this._data.link;
var url = ISBN.replace(source, isbn);
var req = new XMLHttpRequest();
var timeout = setTimeout(req.abort, 10000);
req.open('GET', url, true);
req.onload = function (aEvent) {
clearTimeout(timeout);
var status = inst.process(req, isbn);
CACHE.set(cacheKey, status);
successCallback(status);
};
// FIXME: onerror
req.send(null);
};
function Store(data) {
Site.call(this, data);
this.kind = 'book_stores';
}
Store.prototype = new Site;
Store.prototype.constructor = Store;
Store.prototype.process =
function store_process(req, isbn) {
try {
if (this._data.match) {
var results = req.responseText.match(this._data.match);
if (results) {
var status = results[1].replace(/^\s*/, '').replace(/\s*$/, '');
if (status[0] != '$') status = '$' + status;
if (status.indexOf('.') == -1 ) status = status + '.00';
if (status.indexOf('.') + 2 == status.length ) status = status + '0';
return status;
} else {
return false;
}
}
return this._data.process(req, isbn);
} catch (e) {
return '!'; // XXX - this causes the exception to be cached
}
};
function Library(data){
Site.call(this, data);
this.have = data.have;
this.dont = data.dont;
this.kind = 'libraries';
}
Library.prototype = new Site;
Library.prototype.constructor = Library;
Library.prototype.process =
function library_process(req, isbn) {
if (this._data.match_isbn) {
var results = req.responseText.toLowerCase().match( isbn.toLowerCase() );
return !!results;
}
if (this._data.found) {
var regex = new RegExp(this._data.found);
var results = req.responseText.match( regex );
return !!results;
}
if (this._data.missing) {
var regex = new RegExp(this._data.missing);
var results = req.responseText.match( regex );
return !results;
}
// XXX - throw an error
};
// var libraries = function() {
//
// FIXME: attempt to load from ProfD,
// if fail, load from data from extension
// try {
// var file = Components.classes['@mozilla.org/file/directory_service;1']
// .getService(Components.interfaces.nsIProperties)
// .get('ProfD', Components.interfaces.nsILocalFile);
// file.append('bookburro');
// file.append('libraries.js');
// var ios = Components.classes['@mozilla.org/network/io-service;1']
// .getService(Components.interfaces.nsIIOService);
// var fileHandler = ios.getProtocolHandler('file')
// .QueryInterface(Components.interfaces.nsIFileProtocolHandler);
// var fileURL = fileHandler.getURLSpecFromFile(file);
// var loader = Components.classes['@mozilla.org/moz/jssubscript-loader;1']
// .getService(Components.interfaces.mozIJSSubScriptLoader);
// var context = {};
// loader.loadSubScript(fileURL, context);
// return context.libraries;
// } catch (e) {}
// there was an error loading libraries from profile
// we will return the list we shipped with
// };
/**************************
* WORLDCAT for a location
*/
function Worldcat() {};
Worldcat.prototype.title = "Worldcat";
Worldcat.prototype.url =
function worldcat_url(isbn) {
return 'http://worldcat.org/wcpa/isbn/'+isbn+'&loc='+this.location();
}
Worldcat.prototype.location =
function worldcat_location() {
if (PREFS.getPrefType('worldcat')) {
var location = PREFS.getCharPref('worldcat');
if (location != '') {
return location;
}
}
};
Worldcat.prototype.active =
function worldcat_active() {
return !!this.location();
};
// Worldcat.prototype.check =
// function worldcat_check(isbn, successCallback, failureCallback, forceQuery) {
// var inst = this;
// var cacheKey = 'worldcat:' + this.location() + ':' + isbn;
// if (!forceQuery) {
// var status = CACHE.get(cacheKey);
// if (status !== undefined) {
// return successCallback(status);
// }
// }
// var req = new XMLHttpRequest();
// req.open('GET', inst.url(isbn), true);
// // FIXME: no fallureCallback?
// req.onreadystatechange = function() {
// if (req.readyState == 4 && req.status == 200) {
// var status = inst.process(req, isbn);
// CACHE.set(cacheKey, status);
// successCallback(status);
// }
// };
// req.send(null);
// };
// Worldcat.prototype.process =
// function worldcat_process(req, isbn) {
// var text = req.responseText;
// if (text.match(/we cannot identify the location you entered/)) {
// return '!';
// }
// if (text.match(/Sorry, no libraries with the specified item were found/)) {
// return '';
// }
// if (text.match(/Your Find in a Library search found no records./)) {
// return '';
// }
// text = text.split(/<table [^>]*class="tableResults"[^>]*>/m)[1];
// text = text.split(/<div class="fin?al-resultsinfo">/m)[0];
// text = text.split(/<table [^>]*class="tableLibrary"[^>]*>/m);
// var results = [];
// for (var i=1; i<text.length; i++) {
// try {
// var result = {};
// var str = text[i].replace(/[\r\n]+/mg, ' ');
// var name = str.match(/<td class="name">(.*?)<\/td>/);
// if (name) {
// result.name = name[1].replace(/<[^>]*>/g, '');
// var href = name[1].match(/href="(.*?)"/);
// if (href) {
// result.href = href[1];
// }
// } else { continue; }
// result.distance = text[i].match(/\d+ miles?/m)[0];
// result.location = text[i].match(/<td class="location">([^<]*)<\/td>/m)[1];
// results.push(result);
// } catch (e) {}
// }
// return results;
// };
BBSVC.worldcat = function() {
return new Worldcat();
}
/***********************
* Store enumerator
*/
function active_stores(force) {
var rval = [];
for (var i = 0; i < stores.length; i++) {
var store = new Store(stores[i]);
if (force || store.active()) {
rval.push(store);
}
}
return rval;
}
BBSVC.active_stores = active_stores;
BBSVC.stores = function() {
return active_stores(true);
};
libraries.sort(function(a,b) {
return (a.title < b.title) ? -1 : 1;
});
function active_libraries(force) {
var rval = [];
try {
var custom = getCustom();
if (custom) {
for (var i = 0; i < custom.length; i++) {
rval.push(new Library(custom[i]));
}
}
} catch(e) {
log("Error loading custom.js: " + e);
}
for (var i = 0; i < libraries.length; i++) {
var library = new Library(libraries[i]);
if (force || library.active()) {
rval.push(library);
}
}
return rval;
}
BBSVC.active_libraries = active_libraries;
BBSVC.libraries = function() {
return active_libraries(true);
};