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function cache_refresh() {
if ('serviceWorker' in navigator) {
localforage.getItem("epube.cache-timestamp").then(function(stamp) {
var ts = parseInt(new Date().getTime()/1000);
if (!stamp || ts - stamp > 3600) {
console.log('asking worker to refresh cache');
navigator.serviceWorker.controller.postMessage("refresh-cache");
localforage.setItem("epube.cache-timestamp", ts);
}
});
}
}
function mark_offline(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(bookId, function() {
mark_offline(elem);
});
return false;
};
elem.innerHTML = "Remove offline data";
} else {
elem.onclick = function() {
offline_cache(bookId, function() {
mark_offline(elem);
});
return false;
};
elem.innerHTML = "Make available offline";
}
});
}
function mark_offline_books() {
var elems = $(".offline_dropitem");
$.each(elems, function (i, elem) {
mark_offline(elem);
});
}
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('backend.php?op=download&id=' + data.epub_id, {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());
}
});
}
});
}
});
}
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