add common.js

1 files changed, 25 insertions, 0 deletions

diff --git a/js/common.js b/js/common.js
new file mode 100644
index 0000000..34467ae
--- /dev/null
+++ b/js/common.js
@@ -0,0 +1,25 @@
+function offline_remove(elem, callback) {
+
+	if (confirm("Remove download?")) {
+
+		var id = elem.getAttribute("data-book-id");
+		var cacheId = "epube-book." + id;
+		var promises = [];
+
+		console.log("offline remove: " + id);
+
+		localforage.iterate(function(value, key, i) {
+			if (key.match(cacheId)) {
+				promises.push(localforage.removeItem(key));
+			}
+		});
+
+		Promise.all(promises).then(function() {
+			window.setTimeout(function() {
+				callback();
+			}, 500);
+		});
+	}
+}
+
+