implemented updates

import_data.py

@@ -20,38 +20,116 @@ print(f"Importing data from {csv_file}...")
 import_timestamp = datetime.datetime.now()
 print(f"Import timestamp: {import_timestamp}")
 
-# First, create a temporary table with the CSV data
+# Create temporary table with CSV data, import timestamp, and hash
 con.execute("""
-    CREATE TABLE IF NOT EXISTS temp_working_times AS
-    SELECT * FROM read_csv_auto(
-        '{csv_file}', 
-        delim=';',
-        header=true,
-        ignore_errors=true,
-        sample_size=1000,
-        auto_detect=true,
-        decimal_separator=','
+    CREATE TEMP TABLE IF NOT EXISTS temp_working_times AS
+    WITH base_data AS (
+        SELECT 
+            *,
+            '{timestamp}'::TIMESTAMP AS import_timestamp
+        FROM read_csv_auto(
+            '{csv_file}', 
+            delim=';',
+            header=true,
+            ignore_errors=true,
+            sample_size=1000,
+            auto_detect=true,
+            decimal_separator=','
+        )
     )
-""".format(csv_file=csv_file))
-
-# Drop the existing table if it exists
-con.execute("DROP TABLE IF EXISTS working_times")
-
-# Now create the final table with the timestamp column
-con.execute("""
-    CREATE TABLE working_times AS
     SELECT 
         *,
-        '{timestamp}' AS import_timestamp
-    FROM temp_working_times
-""".format(timestamp=import_timestamp))
+        md5(
+            "Datum" || '|' ||
+            "Von" || '|' ||
+            "Bis" || '|' ||
+            "Pause" || '|' ||
+            "Gebucht von" || '|' ||
+            "Gebucht am" || '|' ||
+            "Name" || '|' ||
+            "Kennung" || '|' ||
+            "Projekt-PSP-ID" || '|' ||
+            "Projektname" || '|' ||
+            "PSP-ID" || '|' ||
+            "PSP-Name" || '|' ||
+            "ProMaTo-Projekt-Nr." || '|' ||
+            "ProMaTo-Projekt" || '|' ||
+            "Kategorie" || '|' ||
+            "Gruppenname" || '|' ||
+            "Jira-Epic" || '|' ||
+            "Aufgaben-Nr." || '|' ||
+            "Aufgabenname" || '|' ||
+            "Leistungsart" || '|' ||
+            "Leistungsart (Bezeichnung)" || '|' ||
+            "Zeit [h]" || '|' ||
+            "Kommentar"
+        ) AS row_hash
+    FROM base_data
+""".format(csv_file=csv_file, timestamp=import_timestamp))
 
-# Drop the temporary table
-con.execute("DROP TABLE IF EXISTS temp_working_times")
+# Create the working_times table if it doesn't exist
+con.execute("""
+    CREATE TABLE IF NOT EXISTS working_times AS
+    SELECT * FROM temp_working_times LIMIT 0
+""")
+
+# Add column for delete flag if it doesn't exist
+con.execute("""
+    ALTER TABLE working_times
+    ADD COLUMN IF NOT EXISTS delete BOOLEAN DEFAULT NULL
+""")
+
+# Get all unique dates from the new data
+con.execute("""
+    CREATE TEMP TABLE temp_import_dates AS
+    SELECT DISTINCT "Datum" FROM temp_working_times
+""")
+
+# Get all unique dates from existing data, ignore deleted entries
+con.execute("""
+    CREATE TEMP TABLE temp_existing_dates AS
+    SELECT DISTINCT "Datum" FROM working_times
+""")
+
+# Find dates that are new (not in existing data)
+con.execute("""
+    CREATE TEMP TABLE temp_new_dates AS
+    SELECT t."Datum" 
+    FROM temp_import_dates t
+    LEFT JOIN temp_existing_dates e ON t."Datum" = e."Datum"
+    WHERE e."Datum" IS NULL
+""")
+
+# Find dates that exist in both tables and might have changes
+con.execute("""
+    CREATE TEMP TABLE temp_changed_dates AS
+    SELECT DISTINCT t."Datum"
+    FROM temp_working_times t
+    JOIN working_times e ON t."Datum" = e."Datum"
+    WHERE NOT EXISTS (
+        SELECT 1 FROM working_times e2
+        WHERE e2."Datum" = t."Datum"
+        AND e2.row_hash = t.row_hash
+    )
+""")
+
+# Insert new data for new and changed dates
+con.execute("""
+    INSERT INTO working_times
+    SELECT * FROM temp_working_times
+    WHERE "Datum" IN (
+        SELECT "Datum" FROM temp_new_dates
+        UNION
+        SELECT "Datum" FROM temp_changed_dates
+    )
+""")
+
+# Set delete flag
+# TODO
 
 # Verify the data was imported
 count = con.execute("SELECT COUNT(*) FROM working_times").fetchone()[0]
-print(f"Successfully imported {count} records into the working_times table.")
+print(f"Successfully imported data. Total records in database: {count}")
 
 # Show the table schema
 print("\nTable Schema:")