feat: Change default database engine to SQLite, change schema.

leggen/utils/mongo.py

@@ -0,0 +1,32 @@
+import click
+from pymongo import MongoClient
+from pymongo.errors import DuplicateKeyError
+
+from leggen.utils.text import success, warning
+
+
+def save_transactions(ctx: click.Context, account: str, transactions: list):
+    # Connect to MongoDB
+    mongo_uri = ctx.obj["mongo_uri"]
+    client = MongoClient(mongo_uri)
+    db = client["leggen"]
+    transactions_collection = db["transactions"]
+
+    # Create a unique index on internalTransactionId
+    transactions_collection.create_index("internalTransactionId", unique=True)
+
+    # Insert transactions into MongoDB
+    new_transactions_count = 0
+    duplicates_count = 0
+
+    for transaction in transactions:
+        try:
+            transactions_collection.insert_one(transaction)
+            new_transactions_count += 1
+        except DuplicateKeyError:
+            # A transaction with the same ID already exists, skip insertion
+            duplicates_count += 1
+
+    success(f"[{account}] Inserted {new_transactions_count} new transactions")
+    if duplicates_count:
+        warning(f"[{account}] Skipped {duplicates_count} duplicate transactions")