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define([
"lodash",
"jQuery",
"utils/storage",
"core/state"
], function(_, $, storage, state) {
// Get current level
var getCurrentLevel = function() {
return state().level;
};
// Return all levels
var getLevels = function() {
var levels = $(".book-summary li[data-level]");
return _.map(levels, function(level) {
return $(level).data("level").toString();
});
};
// Return a map chapter -> number (timestamp)
var getProgress = function() {
// Current level
var progress = storage.get("progress", {});
// Levels
var levels = getLevels();
_.each(levels, function(level) {
progress[level] = progress[level] || 0;
});
return progress;
};
// Change value of progress for a level
var markProgress = function(level, state) {
if (state == null) state = true;
var progress = getProgress();
progress[level] = state? Date.now() : 0;
storage.set("progress", progress);
};
// Show progress
var showProgress = function() {
// Update progress
var progress = getProgress();
var $summary = $(".book-summary");
_.each(progress, function(value, level) {
$summary.find("li[data-level='"+level+"']").toggleClass("done", value > 0);
});
// Mark current progress
markProgress(getCurrentLevel(), true);
};
return {
'current': getCurrentLevel,
'levels': getLevels,
'get': getProgress,
'mark': markProgress,
'show': showProgress
};
});
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