X-Git-Url: https://git.mdrn.pl/wl-mobile.git/blobdiff_plain/bff5852b5ee1320a6eaf4256570784bbc024496f..b9acd6c8b2300a76624900cd19f9e40e59ff3f7b:/www/js/filerepo.js

diff --git a/www/js/filerepo.js b/www/js/filerepo.js
new file mode 100644
index 0000000..58b6809
--- /dev/null
+++ b/www/js/filerepo.js
@@ -0,0 +1,130 @@
+/*
+ * This file is part of WolneLektury-Mobile, licensed under GNU Affero GPLv3 or later.
+ * Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
+ */
+
+var FileRepo = new function() {
+	/* API for files repository */
+	var self = this;
+	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) {
+			debug('local fs found: ' + fs.root.fullPath);
+			self.root = fs.root;
+			
+			success && success();
+		}, function() {
+			debug('local fs not found');
+			success && success();
+		});
+	};
+
+
+	this.withLocalHtml = function(book_id, success, error) {
+		debug('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;
+		debug('info:withLocalHtml: local ajax: ' + url);
+		var xhr = new XMLHttpRequest();
+		xhr.open('GET', url, true);
+		xhr.onload = function() {
+			debug('info:withLocalHtml: fetched by local ajax: ' + url);
+			success && success(xhr.responseText);
+		}
+		xhr.onerror = error;
+		xhr.send();
+	};
+
+
+	this.withLocal = function(win, fail) {
+		if (self.root) {
+			self.root.getDirectory('html', {create:true}, function(dir) {
+				var reader = dir.createReader();
+				reader.readEntries(win, fail);
+			});
+		}
+		else {
+			win && win([]);
+		}
+	}
+
+
+	// downloads HTML file from server, saves it in cache and calls success with file contents
+	this.withHtmlFromServer = function(book_id, success, error) {
+		debug('info:withHtmlFromServer: id:' + book_id);
+		// read file from WL
+		Catalogue.withBook(book_id, function(book) {
+			var url = WL + book.html_file;
+			debug('info:withHtmlFromServer: fetching url: ' + url);
+
+			View.spinner("Pobieranie treści utworu z sieci");
+
+			var xhr = new XMLHttpRequest();
+			xhr.open("GET", url);
+			xhr.onload = function() {			
+				data = xhr.responseText;
+				if(xhr.status != 200) {
+						   alert(xhr.status);
+					error && error('Błąd podczas pobierania pliku');
+				} else {
+				  if (self.root) {
+					self.root.getDirectory('html', {create: true}, function(dir) {
+							var reader = dir.getFile(''+book_id, {create: true}, function(f) {
+													 f.createWriter(function(w) {
+																	w.write(data);
+																	self.db.transaction(function(tx) {
+																						alert('setlocal0');
+																						tx.executeSql("UPDATE book SET _local=1 WHERE id="+book_id);
+																						alert('setlocal1');
+																						});
+																	});
+													 });
+										   });
+				  }
+				  success && success(data);
+				}
+			};
+			xhr.onerror = function(e) {
+				debug('Błąd podczas pobierania pliku')
+				error && error("error: " + data);
+			};
+			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) {
+		debug('info:withHtml: id:' + id);
+		self.withLocalHtml(id, success, function() {
+			self.withHtmlFromServer(id, success, error);
+		});
+	};
+
+
+	this.clear = function() {
+		FileRepo.withLocal(function(local) {
+			for (i in local) {
+				local[i].remove();
+			}
+		});
+	};
+
+
+	this.deleteIfExists = function(id) {
+		if (self.root) {
+			self.root.getFile('html/' + id, {create: false}, function(f) {
+				f.remove();
+			});
+		}
+	}
+};