Listening stats: time listened per day, streak and finished audiobooks

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

tools/listening-test.js

@@ -0,0 +1,15 @@
+// Listening stats: time listened is counted from progress reports (seeks are not), per day and kind; finished items and the day streak are worked out.
+const assert = require('assert'), fs = require('fs'), os = require('os'), path = require('path');
+process.env.DATA_DIR = fs.mkdtempSync(path.join(os.tmpdir(), 'nehub-listen-'));
+const users = require('../users'), me = users.create({ name: 'Ann', role: 'admin', handle: 'YQ' }), progress = require('../progress');
+const pod = progress('podcast-progress.json', 'podcast'), ab = progress('audiobook-progress.json', 'audiobook');
+users.runAs(me, () => {
+  const t0 = Date.now() - 60e3;
+  pod.merge({ e1: { pos: 100, dur: 3000, t: t0 } }); pod.merge({ e1: { pos: 130, dur: 3000, t: t0 + 30e3 } });            // 30 s listened in 30 s
+  pod.merge({ e1: { pos: 1500, dur: 3000, t: t0 + 40e3 } });                                                               // a seek: not counted
+  ab.merge({ b1: { pos: 7000, dur: 7100, t: t0 } }); ab.merge({ b1: { pos: 7090, dur: 7100, t: t0 + 50e3 } });             // 50 s counted at most, and the book is finished
+  let s = progress.stats(); assert.equal(Math.round(s.podcast), 30, 'only real listening counts'); assert.ok(s.audiobook > 0 && s.audiobook <= 55); assert.equal(s.finishedYear, 1); assert.equal(s.finishedAll, 1);
+  pod.merge({ e1: { pos: 1530, dur: 3000, t: t0 + 70e3 } }); s = progress.stats(); assert.equal(s.streak, 1, 'a minute or more makes a streak day');
+  const old = progress('podcast-progress.json', 'podcast'); old.merge({ e1: { pos: 5, dur: 3000, t: t0 - 1e3 } }); assert.equal(progress.stats().podcast, s.podcast, 'an older report changes nothing');
+  console.log('listening test ok');
+});