First commit

storymanager.js

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+
+// Choose one of an array
+var randomChoice = function(vals) {
+	return vals[Math.floor(Math.random() * vals.length)];
+};
+
+// Set up the general narrative manager
+// -----------------------------------------------------------------------
+var NarrativeManager = {meta: []};
+NarrativeManager.getAllStorylets = function() {
+	let allStorylets = [];
+	for (let key in this.storyletMakers) {
+		let storylets = this.storyletMakers[key]();
+		for (let i in storylets) allStorylets.push(storylets[i]);
+	}
+	return allStorylets;
+}
+
+NarrativeManager.getNStorylets = function(n) {
+	/* 
+		Get N storylets, prioritizing the highest-priority ones first.
+		For now assume that priorities are integers, but it would be nice
+		to be more flexible.
+
+	*/
+	let allStorylets = this.getAllStorylets();
+	n = Math.min(n, allStorylets.length);
+	if (n == 0) return [];
+	let selectedStorylets = [];
+	// First sort by ascending priority:
+	allStorylets.sort((a, b) => b.priority - a.priority);
+	let currentPriority = allStorylets[0].priority;
+	while (selectedStorylets.length < n) {
+		let priorityStorylets = allStorylets.filter(s => s.priority==currentPriority);
+		priorityStorylets.sort((a, b) => (Math.random() - Math.random()));
+		let nAdd = Math.min(n - selectedStorylets.length, priorityStorylets.length);
+		for (let i=0; i<nAdd; i++) selectedStorylets.push(priorityStorylets.pop());
+		currentPriority--;
+	}
+	return selectedStorylets;
+}
+
+window.NM = NarrativeManager;