From 50ee99fa8898e9333ed5ba1b558e0073d1d337ae Mon Sep 17 00:00:00 2001
From: Martin Brodbeck <martin@brodbeck-online.de>
Date: Wed, 8 Jan 2025 14:19:25 +0100
Subject: [PATCH] Migration Skript (Redis -> PostgreSQL)

---
 python/redis2pg.py | 52 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 python/redis2pg.py

diff --git a/python/redis2pg.py b/python/redis2pg.py
new file mode 100644
index 0000000..c96efcb
--- /dev/null
+++ b/python/redis2pg.py
@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+
+import psycopg2
+import re
+import redis
+
+con = redis.Redis()
+
+pgcon = psycopg2.connect("postgresql://kosync:mypassword@localhost/kosync")
+pgcur = pgcon.cursor()
+
+userkeys = con.keys('user:*:key')
+
+for key in userkeys:
+    key = key.decode('utf-8')
+    match = re.search('user:(.*):key', key)
+    username = match.group(1)
+    password = con.get(key).decode('utf-8')
+
+    documentkeys = con.keys('user:' + username + ':document:*')
+    if len(documentkeys) == 0:
+        print("Skipped:", username)
+        continue
+    
+    pgcur.execute("INSERT INTO users (username, password) VALUES (%s, %s) ON CONFLICT (username) DO UPDATE SET username = %s, password = %s",
+                  (username, password, username, password))
+
+    pgcur.execute("SELECT id FROM users WHERE username = %s", (username,))
+    res = pgcur.fetchone()
+    user_id = res[0]
+
+    for dockey in documentkeys:
+        dockey = dockey.decode('utf-8')
+
+        match = re.search("user:.*:(.*)", dockey)
+        document = match.group(1)
+
+        docvals = con.hgetall(dockey)
+
+        progress = docvals[b"progress"].decode()
+        percentage = docvals[b"percentage"].decode()
+        device = docvals[b"device"].decode()
+        device_id = docvals[b"device_id"].decode()
+        timestamp = docvals[b"timestamp"].decode()
+
+        pgcur.execute("INSERT INTO progresses (user_id, document, progress, percentage, device, device_id, timestamp) VALUES (%s, %s, %s, %s, %s, %s, %s) ON CONFLICT (user_id, document) DO UPDATE SET user_id = %s, document = %s, progress = %s, percentage = %s, device = %s, device_id = %s, timestamp = %s",
+                      (user_id, document, progress, percentage, device, device_id, timestamp, user_id, document, progress, percentage, device, device_id, timestamp))
+
+pgcon.commit()
+
+pgcur.close()
+pgcon.close()