You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
96 lines
2.5 KiB
96 lines
2.5 KiB
var http = require("http");
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var path = require("path");
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var express = require("express");
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function shuffle(array) {
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for (var i = array.length - 1; i > 0; i--) {
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var j = Math.floor(Math.random() * (i + 1));
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var temp = array[i];
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array[i] = array[j];
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array[j] = temp;
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}
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return array;
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}
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var root = path.join(__dirname, "..");
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var argc = process.argv.length;
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if(argc < 3){
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console.error("must provide data file, e.g. \"learncards data.json\"");
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process.exit(1);
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}
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var data_file = path.join(process.cwd(), process.argv[argc - 1]);
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var data = require(data_file);
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if(typeof(data) !== "object" || !data.hasOwnProperty("cards")){
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console.error("data file ", data_file, "does not contain \"cards\" property");
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process.exit(1);
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}
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var num_cards = data.cards.length;
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for(var i = 0; i < num_cards; ++i){
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var next = data.cards[i];
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if(!next.hasOwnProperty("question")){
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console.error("card", next, "requires \"question\" property");
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process.exit(1);
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}
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if(!next.hasOwnProperty("answer")){
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console.error("card", next, "requires \"answer\" property");
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process.exit(1);
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}
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}
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var title = "Learn Cards";
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if(data.hasOwnProperty("title")){
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title = data.title + " - Learn Cards";
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}
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var app = express();
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app.set("port", process.env.PORT || 8000);
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app.set("views", path.join(root, "views"));
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app.set("view engine", "jade");
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app.use(express.favicon());
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app.use(app.router);
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app.use(express.static(path.join(root, "public")));
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app.use(express.errorHandler());
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app.get("/", function(req, res){
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res.render("index", {title: title});
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});
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app.get("/card.json", function(req, res){
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var index = 0;
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if(req.query.next){
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index = parseInt(req.query.next);
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} else if(req.query.rand){
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index = Math.floor(Math.random() * num_cards);
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}
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if(index >= num_cards){
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index = 0;
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}
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var card = {};
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card.question = data.cards[index].question;
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card.answer = data.cards[index].answer;
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if(req.query.swap){
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var swap = req.query.swap || "";
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swap = swap.toLowerCase();
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if(Boolean(swap)){
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if(swap == "true" || (swap == "random" && Math.random() < 0.5)){
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var q = card.question;
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card.question = card.answer;
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card.answer = q;
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}
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}
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}
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res.json(200, {index: index, card: card});
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});
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var server = http.createServer(app);
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server.listen(app.get("port"), function(){
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console.log("learncards is listening on port", app.get("port"));
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});
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