cleanup can erase or del based on record purpose

lib/index.js

@@ -26,17 +26,23 @@ module.exports = {
     // State
     const debug = makeDebug('ppppp:gc')
 
+    /**
+     * Deletes messages that don't correspond to any goal.
+     * @private
+     */
     function cleanup(cb) {
       debug('cleanup goalless started')
       const done = multicb({ pluck: 1 })
-      let waitingForDels = false
+      let waiting = false
       for (const rec of peer.db.records()) {
         if (!rec.msg) continue
-        const goals = peer.goals.getByRec(rec)
-        if (goals.length === 0) {
+        const purpose = peer.goals.getRecordPurpose(rec)
+        if (purpose === 'none') {
           peer.db.del(rec.id, done())
-          waitingForDels = true
-        } else {
+          waiting = true
+        } else if (purpose === 'trail') {
+          peer.db.erase(rec.id, done())
+          waiting = true
         }
       }
       function whenEnded(err) {
@@ -45,7 +51,7 @@ module.exports = {
         else debug('cleanup goalless ended')
         cb()
       }
-      if (waitingForDels) done(whenEnded)
+      if (waiting) done(whenEnded)
       else whenEnded()
     }
 

test/feed-holes.test.js

@@ -40,25 +40,26 @@ test('feed holes', async (t) => {
   await p(alice.db.del)(posts[3])
   await p(alice.db.del)(posts[4])
   await p(alice.db.del)(posts[5])
-  await p(alice.db.del)(posts[6])
+  await p(alice.db.erase)(posts[6]) // vital as trail from A7
   assert('alice deleted the middle part of the feed')
 
   assert.deepEqual(
     getTexts([...alice.db.msgs()]),
-    ['A0', 'A1', 'A2', 'A7', 'A8', 'A9'],
+    ['A0', 'A1', 'A2', /*                   */ 'A7', 'A8', 'A9'],
     'alice has the beginning and the end of the feed'
   )
 
   alice.goals.set(aliceID, 'all') // alice wants her account tangle
   const postFeedID = alice.db.feed.getID(aliceID, 'post')
-  alice.goals.set(postFeedID, 'newest-3')
-  assert('alice set a goal for newest-3 of post feed')
+  // notice 4 on purpose, because we want to make sure A2 is deleted
+  alice.goals.set(postFeedID, 'newest-4')
+  assert('alice set a goal for newest-4 of post feed')
 
   await p(alice.gc.forceImmediately)()
 
   assert.deepEqual(
     getTexts([...alice.db.msgs()]),
-    ['A7', 'A8', 'A9'],
+    [/*                                     */ 'A7', 'A8', 'A9'],
     'alice has only the end of the feed'
   )