Rename server => modules

modules/actions/showStats.js

@@ -0,0 +1,63 @@
+const subDays = require("date-fns/sub_days");
+const startOfDay = require("date-fns/start_of_day");
+const startOfSecond = require("date-fns/start_of_second");
+
+const StatsAPI = require("../StatsAPI");
+
+function showStats(req, res) {
+  let since, until;
+  switch (req.query.period) {
+    case "last-day":
+      until = startOfDay(new Date());
+      since = subDays(until, 1);
+      break;
+    case "last-week":
+      until = startOfDay(new Date());
+      since = subDays(until, 7);
+      break;
+    case "last-month":
+      until = startOfDay(new Date());
+      since = subDays(until, 30);
+      break;
+    default:
+      until = req.query.until
+        ? new Date(req.query.until)
+        : startOfSecond(new Date());
+      since = new Date(req.query.since);
+  }
+
+  if (isNaN(since.getTime())) {
+    return res.status(403).send({ error: "?since is not a valid date" });
+  }
+
+  if (isNaN(until.getTime())) {
+    return res.status(403).send({ error: "?until is not a valid date" });
+  }
+
+  if (until <= since) {
+    return res
+      .status(403)
+      .send({ error: "?until date must come after ?since date" });
+  }
+
+  if (until >= new Date()) {
+    return res.status(403).send({ error: "?until must be a date in the past" });
+  }
+
+  StatsAPI.getStats(since, until).then(
+    stats => {
+      res
+        .set({
+          "Cache-Control": "public, max-age=60",
+          "Cache-Tag": "stats"
+        })
+        .send(stats);
+    },
+    error => {
+      console.error(error);
+      res.status(500).send({ error: "Unable to fetch stats" });
+    }
+  );
+}
+
+module.exports = showStats;