From 5a5931dbcda6dd519cc3111c8c5ad2fb6502b534 Mon Sep 17 00:00:00 2001
From: evlist <vdv@dyomedea.com>
Date: Sun, 12 Feb 2023 12:19:00 +0100
Subject: [PATCH] Implementing a mechanism to purge deleted docs.

---
 src/db-admin/health-legacy.ts | 113 +++++++++++++++++++---------------
 1 file changed, 62 insertions(+), 51 deletions(-)

diff --git a/src/db-admin/health-legacy.ts b/src/db-admin/health-legacy.ts
index 7cae0cd..eade03a 100644
--- a/src/db-admin/health-legacy.ts
+++ b/src/db-admin/health-legacy.ts
@@ -1,10 +1,8 @@
-import { createEffect, createRoot, createSignal, Signal } from 'solid-js';
+import { createEffect, createRoot, createSignal } from 'solid-js';
 import PouchDB from 'pouchdb';
 import indexeddb from 'pouchdb-adapter-indexeddb';
 
 import { sleep, until } from '../lib/async-wait';
-import { openDatabases } from './open';
-import { toHex } from '../lib/to-hex';
 import { isEqual } from 'lodash';
 
 PouchDB.plugin(indexeddb);
@@ -108,18 +106,15 @@ export const watchDbLegacy = async () => {
         });
     }
 
-    const timerId = setInterval(updateStatus, 10000);
+    const timerId = setInterval(updateStatus, 15000);
 
     // db.compact();
-
-    // await sleep(10000);
-
     const openIDb = (name: string) =>
       new Promise((resolve, reject) => {
         const iDb = indexedDB.open(name);
         iDb.onerror = (event: any) => {
           console.error({
-            caller: 'watchDb',
+            caller: 'watchDbLegacy',
             message: 'open db error',
             target: event.target,
           });
@@ -127,11 +122,6 @@ export const watchDbLegacy = async () => {
         };
 
         iDb.onsuccess = (event: any) => {
-          console.log({
-            caller: 'watchDb',
-            message: 'open db',
-            target: event.target,
-          });
           resolve(event.target.result);
         };
       });
@@ -141,7 +131,7 @@ export const watchDbLegacy = async () => {
         const request = store.getAll();
         request.onerror = (event: any) => {
           console.error({
-            caller: 'watchDb',
+            caller: 'watchDbLegacy',
             message: 'getAll error',
             target: event.target,
           });
@@ -149,50 +139,71 @@ export const watchDbLegacy = async () => {
         };
 
         request.onsuccess = (event: any) => {
-          console.log({
-            caller: 'watchDb',
-            message: 'getAll',
-            target: event.target,
-          });
           resolve(event.target.result as any[]);
         };
       });
 
-    await until(
-      () =>
-        state()?.sync?.paused &&
-        state()?.sync?.lastSeq >= state()?.localUpdateSeq,
-      1000
-    );
+    const getDeletedDocs = async () => {
+      const iDb = (await openIDb(`_pouch_${state().dbName}`)) as IDBDatabase;
+      const bySequence = iDb.transaction('docs', 'readonly');
+      const store = bySequence.objectStore('docs');
+      const allDocs = (await getAll(store)) as any[];
+      iDb.close();
+      const docs = allDocs
+        .filter(
+          (doc) =>
+            !doc.id.startsWith('_local') &&
+            doc.deleted === 1 &&
+            doc.seq <= state()?.sync?.lastSeq
+        )
+        .map((doc) => ({ id: doc.id, rev: doc.rev }));
+      //   console.log({
+      //     caller: 'watchDbLegacy / getDeletedDocs',
+      //     // bySequence,
+      //     // store,
+      //     // allDocs,
+      //     docs,
+      //     state: state(),
+      //   });
+      return docs;
+    };
 
-    console.log({ caller: 'watchDbLegacy / ready to purge after sync ' });
-    // const iDb = (await openIDb('_pouch__dyomedea_')) as IDBDatabase;
+    while (true) {
+      await until(
+        () =>
+          state()?.sync?.paused &&
+          state()?.sync?.lastSeq >= state()?.localUpdateSeq,
+        1000
+      );
 
-    // const bySequence = iDb.transaction('docs', 'readonly');
-    // const store = bySequence.objectStore('docs');
-    // console.log({
-    //   caller: 'watchDb',
-    //   message: 'transaction opened',
-    //   bySequence,
-    //   store,
-    // });
+      console.log({ caller: 'watchDbLegacy / ready to purge after sync ' });
 
-    // const docs = (await getAll(store)) as any[];
+      const deletedDocs = await getDeletedDocs();
 
-    // docs.forEach(async (doc) => {
-    //   const { id, rev, deleted } = doc;
-    //   if (deleted !== 0) {
-    //     //     const purge = await db.purge(id, rev);
-    //     console.log({
-    //       caller: 'watchDb',
-    //       message: 'purging',
-    //       id,
-    //       rev,
-    //       doc,
-    //       //       purge,
-    //     });
-    //     await sleep(1000);
-    //   }
-    // });
+      if (deletedDocs.length > 0) {
+        console.log({
+          caller: 'watchDbLegacy / purge',
+          // bySequence,
+          // store,
+          // allDocs,
+          deletedDocs,
+          state: state(),
+        });
+
+        deletedDocs.forEach(async (doc) => {
+          await sleep(500);
+          try {
+            await db.purge(doc.id, doc.rev);
+          } catch (err) {
+            console.log({
+              caller: 'watchDbLegacy / purge',
+              doc,
+              err,
+            });
+          }
+        });
+      }
+      await sleep(60000);
+    }
   });
 };