X-Git-Url: https://git.mdrn.pl/wl-mobile.git/blobdiff_plain/8b7b42d45674861437a31e9f9125a277ce998721..065d23f9494e1afb7f61ada08b728405b1b7a0cf:/assets/www/js/filerepo.js

diff --git a/assets/www/js/filerepo.js b/assets/www/js/filerepo.js
new file mode 100644
index 0000000..0bd196b
--- /dev/null
+++ b/assets/www/js/filerepo.js
@@ -0,0 +1,119 @@
+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) {
+			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();
+	};
+
+
+	this.withLocal = function(win, fail) {
+		if (self.root) {
+			self.root.getDirectory('html', {}, 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) {
+		console.log('info:withHtmlFromServer: id:' + book_id);
+		// read file from WL
+		Catalogue.withBook(book_id, function(book) {
+			var url = WL + book.html_file;
+			console.log('info:withHtmlFromServer: fetching url: ' + url);
+
+			View.spinner("Pobieranie treści utworu z sieci");
+
+			if (self.root) {
+				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("GET", url);
+				xhr.onload = function() {
+					console.log('info:withHtmlFromServer: fetched by ajax: ' + url);
+					success && success(xhr.responseText);
+				}
+				xhr.onerror = function() {
+					console.log('error downloading file!')
+					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) {
+		console.log('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();
+			});
+		}
+	}
+};