further offline improvements

1 files changed, 85 insertions, 7 deletions

diff --git a/js/index.js b/js/index.js
index e76be90..95615a2 100644
--- a/js/index.js
+++ b/js/index.js
@@ -1,13 +1,91 @@
-function offline_cache(elem) {
-	try {
+function mark_offline_books() {
+	var elems = $(".offline_dropitem");
+
+	$.each(elems, function (i, elem) {
 		var bookId = elem.getAttribute("data-book-id");
+		var cacheId = "epube-book." + bookId;
+
+		localforage.getItem(cacheId).then(function(book) {
+			if (book) {
+
+				elem.onclick = function() {
+					offline_remove(elem, function() {
+						mark_offline_books();
+					});
+				};
+
+				elem.innerHTML = "Remove offline data";
+
+
+			} else {
+				elem.onclick = function() {
+					offline_cache(bookId, function() {
+						mark_offline_books();
+					});
+				};
+
+				elem.innerHTML = "Make available offline";
+			}
+		});
+	});
+}
+
+function offline_cache(bookId, callback) {
+	console.log("offline cache: " + bookId);
+
+	$.post("backend.php", {op: "getinfo", id: bookId}, function(data) {
+
+		if (data) {
+			var cacheId = 'epube-book.' + bookId;
+
+			localforage.setItem(cacheId, data).then(function(data) {
+
+				console.log(cacheId + ' got data');
+
+				fetch('getbook/' + data.epub_id + ".epub", {credentials: 'same-origin'}).then(function(resp) {
+					if (resp.status == 200) {
+						console.log(cacheId + ' got book');
+
+						callback();
+
+						localforage.setItem(cacheId + '.book', resp.blob());
+					}
+				});
+
+				fetch("backend.php?op=getpagination&id=" + data.epub_id, {credentials: 'same-origin'}).then(function(resp) {
+					if (resp.status == 200) {
+						console.log(cacheId + ' got pagination');
+
+						resp.text().then(function(text) {
+							localforage.setItem(cacheId + '.pagination', JSON.parse(text));
+						});
+					}
+				});
+
+				fetch("backend.php?op=getlastread&id=" + data.epub_id, {credentials: 'same-origin'}).then(function(resp) {
+					if (resp.status == 200) {
+						console.log(cacheId + ' got lastread');
+						resp.text().then(function(text) {
+							localforage.setItem(cacheId + '.lastread', JSON.parse(text));
+						});
+					}
+				});
+
+				if (data.has_cover) {
+
+					fetch("backend.php?op=cover&id=" + bookId, {credentials: 'same-origin'}).then(function(resp) {
+
+						if (resp.status == 200) {
+							console.log(cacheId + ' got cover');
+							localforage.setItem(cacheId + '.cover', resp.blob());
+						}
 
-		console.log(bookId);
+					});
 
+				}
 
-		return false;
+			});
+		}
 
-	} catch (e) {
-		console.warn(e);
-	}
+	});
 }