X-Git-Url: https://git.mdrn.pl/wl-mobile.git/blobdiff_plain/8b7b42d45674861437a31e9f9125a277ce998721..e02aa48b6f2b7ddca9b55c56288cd2512702da6d:/assets/www/js/catalogue.js

diff --git a/assets/www/js/catalogue.js b/assets/www/js/catalogue.js
index db9c069..615f30f 100644
--- a/assets/www/js/catalogue.js
+++ b/assets/www/js/catalogue.js
@@ -1,340 +1,27 @@
-// FIXME: htmlescape strings!
-
-var VERSION = '0.1';
-
-
-var FileRepo = new function() {
-	/* API for files repository */
-	var self = this;
-	const WL_URL = 'http://www.wolnelektury.pl';
-	this.root = null;
-
-	this.init = function(success, error) {
-		self.initRoot(success);
-	};
-
-	this.initRoot = function(success) {
-		// fs size is irrelevant, PERSISTENT is futile (on Android, at least)
-		window.requestFileSystem(LocalFileSystem.TEMPORARY, 0, function(fs) {
-			console.log('local fs found: ' + fs.root.fullPath);
-			self.root = fs.root;
-			success && success();
-		}, function() {
-			console.log('local fs not found');
-			success && success();
-		});
-	};
-
-
-	this.withLocalHtml = function(book_id, success, error) {
-		console.log('info:withLocalHtml: id:' + book_id);
-		View.spinner('Otwieranie treści utworu');
-		if (!self.root)
-			error && error('info:withLocalHtml: no local html: no usable filesystem');
-
-		var url = "file://" + self.root.fullPath + "/html/" + book_id;
-		console.log('info:withLocalHtml: local ajax: ' + url);
-		var xhr = new XMLHttpRequest();
-		xhr.open('GET', url, true);
-		xhr.onload = function() {
-			console.log('info:withLocalHtml: fetched by local ajax: ' + url);
-			success && success(xhr.responseText);
-		}
-		xhr.onerror = error;
-		xhr.send();
-	};
-
-
-	// downloads HTML file from server, saves it in cache and calls success with file contents
-	this.withHtmlFromServer = function(book_id, success, error) {
-		console.log('info:withHtmlFromServer: id:' + book_id);
-		// read file from WL
-		Catalogue.withBook(book_id, function(book) {
-			var url = WL_URL + book.html_file;
-			console.log('info:withHtmlFromServer: fetching url: ' + url);
-
-			View.spinner("Pobieranie treści utworu z sieci");
-
-			if (self.root) {
-				window.plugins.downloader.downloadFile(url, self.root.fullPath + "/html/", ""+book_id, true,
-					function(data){
-						console.log('info:withHtmlFromServer: loaded file from WL');
-						self.withLocalHtml(book_id, success, error);
-					}, function(data) {
-						console.log('error downloading file!')
-						error && error("error: "+data);
-					});
-			}
-			else {
-				// there's no big fs, so we'll just get the text from AJAX
-				console.log('info:withHtmlFromServer: ajax: ' + url);
-				var xhr = new XMLHttpRequest();
-				xhr.open(url);
-				xhr.onload = function() {
-					console.log('info:withHtmlFromServer: fetched by ajax: ' + url);
-					success && success(xhr.responseText);
-				}
-				xhr.send();
-			}
-		});		
-	};
-	
-	// calls the callback with contents of the HTML file for a given book,
-	// loaded from the server and cached locally
-	this.withHtml = function(id, success, error) {
-		console.log('info:withHtml: id:' + id);
-		self.withLocalHtml(id, success, function() {
-			self.withHtmlFromServer(id, success, error);
-		});
-	};
-};
-
-
-var View = new function() {
-	var self = this;
-	self.minOffset = 1000;
-	//self.element
-	self.categories = {
-			autor: 'Autorzy', 
-			rodzaj: 'Rodzaje',
-			gatunek: 'Gatunki',
-			epoka: 'Epoki'
-	};
-	
-
-	self.init = function() {
-		console.log('View.init');
-
-		self.viewStack = [];
-		self.current;
-		navigator.app.overrideBackbutton(); 
-		document.addEventListener("backbutton", View.goBack, true);
-
-		self._searchbox = document.getElementById("searchbox");
-		self._searchinput = document.getElementById("search");
-		self._content = document.getElementById("content");
-
-		self.enter(location.href);
-	};
-
-
-	this.sanitize = function(text) {
-		return text.replace(/&/g, "&amp;").replace(/</g, "&lt;");
-	};
-
-	this.showSearch = function() {
-		self._searchbox.style.display = "block";
-	};
-
-	this.hideSearch = function() {
-		self._searchbox.style.display = "none";
-	};
-
-	this.spinner = function(text) {
-		if (!text)
-			text = "Ładowanie";
-		self._content.innerHTML = "<div class='spinner'><img src='img/spinner.gif' /><br/><span id='spinnertext'>" + text +"</span></div>";
-		scroll(0, 0);
-	};
-
-	this.content = function(text) {
-		console.log('content');
-
-		self._content.innerHTML = '';
-		self._content.innerHTML = text;
-		scroll(0, 0);
-	}
-	
-	this.enter = function(url) {
-		console.log('View.enter: ' + url);
-
-		self.current = url;
-		var view = 'Index';
-		var arg = null;
-
-		var query_start = url.indexOf('?');
-		if (query_start != -1) {
-			var slash_index = url.indexOf('/', query_start + 1);
-			if (slash_index != -1) {
-				view = url.substr(query_start + 1, slash_index - query_start - 1);
-				arg = url.substr(slash_index + 1);
-			}
-			else {
-				view = url.substr(query_start + 1);
-			}
-		}
-		console.log('View.enter: ' + view + ' ' + arg);
-		self['enter' + view](arg);
-	}
-	
-	this.enterIndex = function(arg) {
-		console.log('enterIndex');
-		self.showSearch();
-		var html = "<div class='book-list'>";
-		for (category in self.categories)
-			html += self.a('Category', category) + self.categories[category] + "</a>\n"; 
-		html += "</div>" +
-				"<p id='logo'><img src='img/wl-logo.png' alt='Wolne Lektury' /><br/>\n" +
-				"szkolna biblioteka internetowa" +
-				//"<br/>v. " + VERSION +
-				"</p>";
-		self.content(html);
-	};
-	
-	this.enterBook = function(id) {
-		id = parseInt(id);
-		console.log('enterBook: ' + id);
-		self.showSearch();
-
-		Catalogue.withBook(id, function(book) {
-		Catalogue.withChildren(id, function(children) {
-		Catalogue.withAuthors(id, function(authors) {
-			var html = "<h1><span class='subheader'>";
-			var auths = [];
-			for (a in authors) auths.push(authors[a].name);
-			html += auths.join(", ");
-			html += "</span>" + book.title + "</h1>\n";
-			if (book.html_file) {
-				html += "<p class='buttons'>" + self.a('BookText', id) + "Czytaj tekst</a></p>";
-			}
-			if (children.length) {
-				html += "<div class='book-list'>";
-				for (c in children) {
-					child = children[c];
-					html += self.a('Book', child.id) + child.title + "</a>\n";
-				}
-				html += "</div>";
-			}
-			self.content(html);				
-		});
-		});
-		});
-	}
-	
-	this.enterBookText = function(id) {
-		id = parseInt(id);
-		self.spinner("Otwieranie utworu");
-		console.log('enterBookText: ' + id);
-		self.hideSearch();
-		
-		FileRepo.withHtml(id, function(data) {
-			self.content(data);
-		});
-	}
-
-	this.enterTag = function(id) {
-		id = parseInt(id);
-		console.log('enterTag: ' + id);
-		self.showSearch();
-
-		self.spinner("Otwieranie listy utworów");
-
-		Catalogue.withTag(id, function(tag) {
-			var html = "<h1><span class='subheader upper'>" + tag.category + ': </span>' + tag.name + "</h1>\n";
-			html += "<div class='book-list'>";
-			if (tag._books) {
-				Catalogue.withBooks(tag._books, function(books) {
-					for (var i in books) {
-						var book = books[i];
-						html += self.a('Book', book.id) + book.title + "</a>\n";
-					}
-					html += "</div>";
-					self.content(html);
-				});
-			}
-		});
-	};
-
-
-	this.enterCategory = function(category) {
-		console.log('enterCategory: ' + category);
-		self.spinner("Otwieranie katalogu");
-		self.showSearch();
-
-		Catalogue.withCategory(category, function(tags) {
-			var html = "<h1>" + self.categories[category] + "</h1>\n";
-			html += "<div class='book-list'>";
-			for (i in tags) {
-				tag = tags[i];
-				html += self.a('Tag', tag.id) + tag.name + "</a>\n";
-			}
-			html += "</div>";
-			self.content(html);
-		});
-	};
-
-
+/*
+ * This file is part of WolneLektury-Mobile, licensed under GNU Affero GPLv3 or later.
+ * Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
+ */
 
-	this.enterSearch = function(query) {
-		console.log('enterTag: ' + query);
-		self.showSearch();
+var DB_VER = '0.9.15';
 
-		var html = "<h1><span class='subheader'>Szukana fraza:</span>" + View.sanitize(query) + "</h1>\n";
+var WL_INITIAL = WL + '/media/api/mobile/initial/initial.db';
+var WL_UPDATE = WL + '/api/changes/SINCE.json?book_fields=author,html,parent,parent_number,sort_key,title' +
+		'&tag_fields=books,category,name,sort_key' +
+		'&tag_categories=author,epoch,genre,kind';
 
-		if (query.length < 2) {
-			html += "<p>Szukana fraza musi mieć co najmniej dwa znaki</p>";
-			self.content(html);
-			return;
-		}
 
-		Catalogue.withSearch(query, function(results) {
-			if (results.length == 1) {
-				self.enter(self.href(results[0].view, results[0].id));
-				return;
-			}
-			if (results.length == 0) {
-				html += "<p>Brak wyników wyszukiwania</p>";
-			}
-			else {
-				html += "<div class='book-list'>";
-				for (var i in results) {
-					var result = results[i];
-					html += self.a(result.view, result.id) + result.label + "</a>\n";
-				}
-				html += "</div>";
-			}
-			self.content(html);
-		});
-	};
 
+var categories = {'author': 'autor',
+              'epoch': 'epoka', 
+              'genre': 'gatunek', 
+              'kind': 'rodzaj', 
+              'theme': 'motyw'
+              }
 
-	/* search form submit callback */
-	this.search = function() {
-		self.goTo('?Search/' + self._searchinput.value);
-		return false;
-	}
-	
-	
-	this.href = function(view, par) {
-		return "?"+view+"/"+par;
-	};
-	
-	this.a = function(view, par) {
-		return "<a class='"+view+"' onclick='View.goTo(\"" + 
-					self.href(view, par).replace(/["']/g, "\\$&") + "\");'>";
-	};
-	
-	this.goTo = function(url) {
-		self.viewStack.push(self.current);
-		console.log('goTo: ' + url);
-		self.enter(url);
-	};
-	
-	this.goBack = function() {
-		if (self.viewStack.length > 0) {
-			var url = self.viewStack.pop();
-			console.log('goBack: ' + url);
-			self.enter(url);
-		}
-		else {
-			console.log('exiting');
-			navigator.app.exitApp();
-		}
-	};
-}
+// FIXME: htmlescape strings!
 
 
-/*
 // for preparing sql statements
 // use like: 
 //   var s = new Sql("INSERT ... '{0}', '{1}' ...";
@@ -350,10 +37,10 @@ var Sql = function(scheme) {
 	self.prepare = function() {
 		var args = arguments;
 		return self.text.replace(/{(\d+)}/g, function(match, number) {
-			return self.sql_escape(args[number]);
+			return self.sql_escape(args[parseInt(number)]);
 		});
 	}
-};*/
+};
 
 
 var Catalogue = new function() {
@@ -396,86 +83,79 @@ var Catalogue = new function() {
 
 	/* check if DB needs updating and upload a fresh copy, if so */
 	this.updateDB = function(success, error) {
-		var db_ver = '0.1.4';
-		if (window.localStorage.getItem('db_ver') == db_ver) {
+		var has_ver = window.localStorage.getItem('db_ver');
+		if (has_ver == DB_VER) {
 			console.log('db ok, skipping')
 			success && success();
 			return;
 		}
 
 		var done = function() {
-			window.localStorage.setItem('db_ver', db_ver);
+			FileRepo.clear();
+			window.localStorage.setItem('db_ver', DB_VER);
 			console.log('db updated');
 			success && success();
 		};
 
 		// db initialize
 		// this is Android-specific for now
-		var version = device.version.split('.')[0];
-		switch(version) {
-		case '1':
-			self.upload_db_android1(done, error);
-			break;
-		case '2':
-			self.upload_db_android2(done, error);
-			break;
-		case '3':
-		default:
-			error && error('Błąd migracji: ' + err);
+		var android = device.version.split('.')[0];
+		if (android > 1) {
+			self.upload_db_android(done, error);
+		} else {
+			error && error("Nieobsługiwana wersja systemu. Wymagany Android>=2.0.");
 		};
 	};
 
 
-	this.upload_db_android1 = function(success, error) {
-		console.log('upload db for Android 1.x');
-		window.requestFileSystem(LocalFileSystem.APPLICATION, 0, function(fs) {
-			window.plugins.assetcopy.copy("initial/wolnelektury.db",
-					fs.root.fullPath + "/databases/wolnelektury.db", true,
-					function(data) {
-						console.log('db upload successful');
-						success && success();
-					}, function(data) {
-						error && error("database upload error: " + data);
-					});
-		}, error);
+	this.upload_db_android = function(success, error) {
+		// TODO: this should be downloaded from teh net, not stored in res
+
+		console.log('upload db for Android 2.x+');
+		// upload databases description file
+
+		var dbname = "wolnelektury";
+		var db = window.openDatabase(dbname, "1.0", "WL Catalogue", 500000);
+		if (db) {
+			console.log('db created successfully');
+			DBPut.fetch(WL_INITIAL, function(data) {
+				console.log('db fetch successful');
+				success && success();
+			}, function(data) {
+				error && error('Błąd podczas pobierania bazy danych: ' + data);
+			});
+		} else {
+			error && error('Błąd podczas inicjowania bazy danych: ' + data);
+		}
 	};
 
 
-	this.upload_db_android2 = function(success, error) {
-		console.log('upload db for Android 2.x');
-		window.requestFileSystem(LocalFileSystem.APPLICATION, 0, function(fs) {
-
-			// upload databases description file
-			window.plugins.assetcopy.copy("initial/Databases.db",
-				fs.root.fullPath + "/app_database/Databases.db", true,
-				function(data) {
-					console.log('db descriptior upload successful');
-
-					// upload the database file
-					window.plugins.assetcopy.copy("initial/0000000000000001.db",
-						fs.root.fullPath + "/app_database/file__0/0000000000000001.db", true,
-						function(data) {
-							console.log('db upload successful');
-							success && success();
-						}, function(data) {
-							error && error("database upload error: " + data);
-						});
-
-					
-				}, function(data) {
-					error && error("database descriptor upload error: " + data);
+	this.withState = function(callback) {
+		self.db.transaction(function(tx) {
+			tx.executeSql("SELECT * FROM state", [], 
+				function(tx, results) {
+					if (results.rows.length) {
+						callback(results.rows.item(0));
+					}
+					else {
+						callback({last_checked: 0});
+					}
 				});
-
-		}, error);
+		});
 	};
 
 
-	this.withBook = function(id, callback) {
+	this.withBook = function(id, callback, error) {
 		console.log('withBook '+id)
 		self.db.transaction(function(tx) {
 			tx.executeSql("SELECT * FROM book WHERE id="+id, [], 
 				function(tx, results) {
-					callback(results.rows.item(0));
+					if (results.rows.length) {
+						callback(results.rows.item(0));
+					}
+					else {
+						error && error();
+					}
 				});
 		});
 	};
@@ -483,7 +163,7 @@ var Catalogue = new function() {
 	this.withBooks = function(ids, callback) {
 		console.log('withBooks ' + ids)
 		self.db.transaction(function(tx) {
-			tx.executeSql("SELECT * FROM book WHERE id IN ("+ids+") ORDER BY title", [], 
+			tx.executeSql("SELECT * FROM book WHERE id IN ("+ids+") ORDER BY sort_key", [], 
 				function(tx, results) {
 					var items = [];
 					var count = results.rows.length;
@@ -495,29 +175,11 @@ var Catalogue = new function() {
 		});
 	};
 
-	this.withAuthors = function(id, callback) {
-		console.log('withAuthors ' + id);
 
-		self.db.transaction(function(tx) {
-			tx.executeSql("SELECT t.name " +
-					"FROM book_tag bt LEFT JOIN tag t ON t.id=bt.tag " +
-					"WHERE bt.book="+id+" AND t.category='autor' " +
-					"ORDER BY t.sort_key", [], 
-				function(tx, results) {
-					var tags = [];
-					var count = results.rows.length;
-					for (var i=0; i<count; ++i) {
-						tags.push(results.rows.item(i));
-					}
-					callback(tags);
-				});
-		});
-	};
-	
 	this.withChildren = function(id, callback) {
 		console.log('withChildren ' + id)
 		self.db.transaction(function(tx) {
-			tx.executeSql("SELECT * FROM book WHERE parent="+id+" ORDER BY parent_number", [], 
+			tx.executeSql("SELECT * FROM book WHERE parent="+id+" ORDER BY parent_number, sort_key", [], 
 				function(tx, results) {
 					var books = [];
 					var count = results.rows.length;
@@ -529,12 +191,17 @@ var Catalogue = new function() {
 		});
 	};
 
-	this.withTag = function(id, callback) {
+	this.withTag = function(id, callback, error) {
 		console.log('withTag '+id)
 		self.db.transaction(function(tx) {
 			tx.executeSql("SELECT * FROM tag WHERE id="+id, [], 
 				function(tx, results) {
-					callback(results.rows.item(0));
+					if (results.rows.length) {
+						callback(results.rows.item(0));
+					}
+					else {
+						error && error();
+					}
 				});
 		});
 	};
@@ -542,7 +209,7 @@ var Catalogue = new function() {
 	this.withCategory = function(category, callback) {
 		console.log('withCategory ' + category)
 		self.db.transaction(function(tx) {
-			tx.executeSql("SELECT * FROM tag WHERE category='"+category+"'", [], 
+			tx.executeSql("SELECT * FROM tag WHERE category='"+category+"' ORDER BY sort_key", [], 
 				function(tx, results) {
 					var items = [];
 					var count = results.rows.length;
@@ -554,71 +221,10 @@ var Catalogue = new function() {
 	};
 
 
-/*	this.withUnrelatedBooks = function(books, success) {
-		if (books.length == 0) return books;
-
-		var book_ids = {};
-		for (i in books) {
-			book_ids[books[i].id] = true;
-		}
-		var new_books = [];
-
-		var addIfUnrelated = function(book) {
-			var addIfUnrelated_wrapped = function(b) {
-				if (b.parent) {
-					if (b.parent in book_ids) {
-						// go to next book
-						filterBooks();
-					}
-					else self.withBook(b.parent, addIfUnrelated_wrapped);
-				}
-				else {
-					new_books.push(book);
-					// go to next book
-					filterBooks();
-				}
-			};
-			addIfUnrelated_wrapped(book);
-		};
-
-
-		var filterBooks = function() {
-			console.log('filterBooks: ' + books.length);
-			if (books.length) {
-				addIfUnrelated(books.shift());
-			}
-			else {
-				success && success(new_books);
-			}
-		};
-		
-		filterBooks();
-	};
-
-
-	this.withBooksTagged = function(tag, callback, withChildren) {
-		self.db.transaction(function(tx) {
-			tx.executeSql("SELECT book.* " +
-					"FROM book LEFT JOIN book_tag ON book_tag.book=book.id " +
-					"WHERE book_tag.tag="+tag+" ORDER BY book.title", [], 
-				function(tx, results) {
-					var books = [];
-					var count = results.rows.length;
-					console.log('withBooksTagged('+tag+'): '+count);
-					for (var i=0; i<count; ++i) {
-						books.push(results.rows.item(i));
-					}
-					if (withChildren)
-						callback(books);
-					else self.withUnrelatedBooks(books, callback);
-				});
-		});
-	};
-*/
-
 	/* takes a query, returns a list of {view,id,label} objects to a callback */
 	this.withSearch = function(term, callback) {
 		console.log('searching...');
+		term =  term.replace(/^\s+|\s+$/g, '') ;
 		var found = [];
 
 		function booksFound(tx, results) {
@@ -628,8 +234,7 @@ var Catalogue = new function() {
 				var item = results.rows.item(i);
 				found.push({
 					view: "Book",
-					id: item.id,
-					label: item.title
+					item: item
 				});
 			}
 		};
@@ -641,8 +246,7 @@ var Catalogue = new function() {
 				var item = results.rows.item(i);
 				found.push({
 					view: "Tag",
-					id: item.id,
-					label: item.name + ' (' + item.category + ')'
+					item: item
 				});
 			}
 			// TODO error handling
@@ -654,13 +258,13 @@ var Catalogue = new function() {
 		// TODO pliterki, start of the word match
 		self.db.transaction(function(tx) {
 			sql_term = self.sqlSanitize(term); // this is still insane, % and _
-			tx.executeSql("SELECT id, title FROM book WHERE title LIKE '%"+sql_term+"%' ORDER BY title LIMIT 10", [],
-			//tx.executeSql("SELECT id, title FROM book WHERE title REGEXP '.*"+sql_term+".*' ORDER BY title", [],
+			tx.executeSql("SELECT * FROM book WHERE title LIKE '%"+sql_term+"%' ORDER BY sort_key LIMIT 10", [],
+			//tx.executeSql("SELECT * FROM book WHERE title REGEXP '.*"+sql_term+".*' ORDER BY sort_key", [],
 				function(tx, results) {
 					// save the books
 					booksFound(tx, results);
 					// and proceed to tags
-					tx.executeSql("SELECT id, name, category FROM tag WHERE name LIKE '%"+sql_term+"%' ORDER BY name LIMIT 10",
+					tx.executeSql("SELECT * FROM tag WHERE name LIKE '%"+sql_term+"%' ORDER BY sort_key LIMIT 10",
 							[], tagsFound);
 				},
 				function(err) {
@@ -670,58 +274,110 @@ var Catalogue = new function() {
 		});
 	};
 
-/*
-	// each book and tag in its own transaction
-	// TODO: error handling
-	self.parse = function(json, success, error) {
-		console.log('parsing');
+	self.chainSqls = function(sqls, success, error) {
+		self.db.transaction(function(tx) {
+			var do_next = function() {
+				if (sqls.length) {
+					var sql = sqls.shift();
+					console.log(sql);
+					tx.executeSql(sql, [], do_next, error);
+				}
+				else {
+					success && success();
+				}
+			}
+			do_next();
+		});
+	};
+
+
+	self.update = function(data, success, error) {
+		var addBookSql = new Sql("\
+			INSERT OR REPLACE INTO book \
+				(id, title, html_file,  html_file_size, parent, parent_number, sort_key, pretty_size, authors) \
+			VALUES \
+				('{0}', '{1}', '{2}', '{3}', '{4}', '{5}', '{6}', '{7}', '{8}')");
+		var addTagSql = new Sql("INSERT OR REPLACE INTO tag (id, category, name, sort_key, books) VALUES ('{0}', '{1}', '{2}', '{3}', '{4}')");
+
 		var sqls = [];
-		var addBookSql = new Sql("INSERT INTO book (id, title, html_file, html_file_size) VALUES ('{0}', '{1}', '{2}', '{3}')");
-		var addBookTagSql = new Sql("INSERT INTO book_tag (book, tag) VALUES ('{0}', '{1}')");
-		var addTagSql = new Sql("INSERT INTO tag (id, category, name) VALUES ('{0}', '{1}', '{2}')");
-
-		var bookValues = [];
-		var books = json.added.books;
-		while (books.length) {
-			var book = books.shift();
-			if (!book.html) book.html = '';
-			if (!book.html_size) book.html_size = '';
-			sqls.push(addBookSql.prepare(book.id, book.title, book.html, book.html_size));
-			for (var t in book.tags) {
-				sqls.push(addBookTagSql.prepare(book.id, book.tags[t]));
+
+		if (data.deleted) {
+			for (i in data.deleted.books) {
+				var book_id = data.deleted.books[i];
+				sqls.push("DELETE FROM book WHERE id=" + book_id);
+				FileRepo.deleteIfExists(book_id);
+			}
+
+			for (i in data.deleted.tags) {
+				var tag_id = data.deleted.tags[i];
+				sqls.push("DELETE FROM tag WHERE id=" + tag_id);
 			}
 		}
-		console.log('ASSERT json.added.books.length=0: ' + json.added.books.length);
 
-		var categories = {author: 'autor', epoch: 'epoch', genre: 'genre', kind: 'kind', theme: 'motyw'};
-		var tags = json.added.tags;
-		while (tags.length) {
-			var tag = tags.shift();
-			sqls.push(addTagSql.prepare(tag.id, categories[tag.category], tag.name));
+		if (data.updated) {
+			for (i in data.updated.books) {
+				var book = data.updated.books[i];
+				if (!book.html) book.html = {};
+				if (!book.html.url) book.html.url = '';
+				if (!book.html.size) book.html.size = '';
+				if (!book.parent) book.parent = '';
+				if (!book.parent_number) book.parent_number = '';
+				var pretty_size = prettySize(book.html.size);
+				sqls.push(addBookSql.prepare(
+					book.id, book.title, book.html.url, book.html.size,
+					book.parent, book.parent_number, book.sort_key, pretty_size, book.author
+				));
+				FileRepo.deleteIfExists(book.id);
+			}
+
+			for (i in data.updated.tags) {
+				var tag = data.updated.tags[i];
+				var category = categories[tag.category];
+				var books = tag.books.join(',');
+				sqls.push(addTagSql.prepare(tag.id, category, tag.name, tag.sort_key, books));
+			}
 		}
 
-		self.chainSql(sqls, success, error);
-	}; */
-}
+		sqls.push("UPDATE state SET last_checked=" + data.time_checked);
 
+		self.chainSqls(sqls, success, error);
+	};
 
 
-function onLoad() {
-	console.log('onLoad');
-	document.addEventListener("deviceready", onDeviceReady, false);
-}
+	this.sync = function(success, error) {
+		self.withState(function(state) {
+			var url = WL_UPDATE.replace("SINCE", state.last_checked); 
+			console.log('sync: ' + url);
+			var xhr = new XMLHttpRequest();
+			xhr.open("GET", url);
+			xhr.onload = function() {
+				console.log('sync: fetched by ajax: ' + url);			
+				self.update(JSON.parse(xhr.responseText), success, error);
+			}
+			xhr.onerror = function(e) {
+				error && error("Błąd aktualizacji bazy danych." + e);
+			}
+			xhr.send();
+		});
+	};
 
-function onDeviceReady() {
-	console.log('onDeviceReady');
-	var error = function(err) { alert(err); };
-	Catalogue.init(
-		function() {
-			console.log('after catalogue.init');
-			FileRepo.init(
-				function() {
-					console.log('after FileRepo.init');
-					View.init();
-				},
-				error);
-		}, error);
+	this.updateLocal = function() {
+		FileRepo.withLocal(function(local) {
+			self.db.transaction(function(tx) {
+				tx.executeSql("UPDATE book SET _local=0", [], function(tx, results) {
+					ll = local.length;
+					var ids = [];
+					for (var i = 0; i < ll; i ++) {
+						ids.push(local[i].name);
+					}
+					ids = ids.join(',');
+					tx.executeSql("UPDATE book SET _local=1 where id in ("+ids+")"); 
+				});
+			});
+		}, function() {
+			self.db.transaction(function(tx) {
+				tx.executeSql("UPDATE book SET _local=0");
+			});
+		});
+	};
 }