Rename embedchain to mem0 and open sourcing code for long term memory (#1474)

Co-authored-by: Deshraj Yadav <deshrajdry@gmail.com>

mem0/memory/storage.py

@@ -0,0 +1,71 @@
+import sqlite3
+import uuid
+from datetime import datetime
+
+
+class SQLiteManager:
+    def __init__(self, db_path=":memory:"):
+        self.connection = sqlite3.connect(db_path, check_same_thread=False)
+        self._create_history_table()
+
+    def _create_history_table(self):
+        with self.connection:
+            self.connection.execute(
+                """
+                CREATE TABLE IF NOT EXISTS history (
+                    id TEXT PRIMARY KEY,
+                    memory_id TEXT,
+                    prev_value TEXT,
+                    new_value TEXT,
+                    event TEXT,
+                    timestamp DATETIME,
+                    is_deleted INTEGER
+                )
+            """
+            )
+
+    def add_history(self, memory_id, prev_value, new_value, event, is_deleted=0):
+        with self.connection:
+            self.connection.execute(
+                """
+                INSERT INTO history (id, memory_id, prev_value, new_value, event, timestamp, is_deleted)
+                VALUES (?, ?, ?, ?, ?, ?, ?)
+            """,
+                (
+                    str(uuid.uuid4()),
+                    memory_id,
+                    prev_value,
+                    new_value,
+                    event,
+                    datetime.utcnow(),
+                    is_deleted,
+                ),
+            )
+
+    def get_history(self, memory_id):
+        cursor = self.connection.execute(
+            """
+            SELECT id, memory_id, prev_value, new_value, event, timestamp, is_deleted
+            FROM history
+            WHERE memory_id = ?
+            ORDER BY timestamp ASC
+        """,
+            (memory_id,),
+        )
+        rows = cursor.fetchall()
+        return [
+            {
+                "id": row[0],
+                "memory_id": row[1],
+                "prev_value": row[2],
+                "new_value": row[3],
+                "event": row[4],
+                "timestamp": row[5],
+                "is_deleted": row[6],
+            }
+            for row in rows
+        ]
+
+    def reset(self):
+        with self.connection:
+            self.connection.execute("DROP TABLE IF EXISTS history")