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import os
import json
import logging
from typing import Optional, List, Dict, Any
from fastapi import APIRouter, Query, HTTPException, status
logger = logging.getLogger(__name__)
router = APIRouter(prefix="/gws", tags=["Google Workspace Ingestion Discovery"])
def get_gws_credentials(conn_id: str = "conn_gws_service_account") -> Optional[Dict[str, Any]]:
"""Retrieve Google Workspace service account JSON from Airflow secrets or env."""
try:
from airflow.models import Connection
conn = Connection.get_connection_from_secrets(conn_id)
if conn and conn.extra_dejson:
extra = conn.extra_dejson
if "keyfile_json" in extra:
val = extra["keyfile_json"]
return json.loads(val) if isinstance(val, str) else val
if "key_path" in extra and os.path.exists(extra["key_path"]):
with open(extra["key_path"], "r", encoding="utf-8") as f:
return json.load(f)
except Exception as e:
logger.debug("Could not resolve GWS credentials from Airflow secrets: %s", e)
key_path = os.getenv("GWS_SERVICE_ACCOUNT_KEY_PATH", "/opt/airflow/keys/gws_service_account.json")
if os.path.exists(key_path):
try:
with open(key_path, "r", encoding="utf-8") as f:
return json.load(f)
except Exception as e:
logger.debug("Could not read GWS key file from %s: %s", key_path, e)
return None
@router.get("/folders/{folder_id}/files")
def list_folder_files(
folder_id: str,
connection_id: str = Query("conn_gws_service_account", description="Airflow Connection ID for GWS")
):
"""
Auto-Discovery of Spreadsheet files within a shared Google Drive folder.
Uses Google Drive API via Service Account with offline sandbox fallback.
"""
creds_dict = get_gws_credentials(connection_id)
files = []
if creds_dict:
try:
from google.oauth2 import service_account
from googleapiclient.discovery import build
credentials = service_account.Credentials.from_service_account_info(
creds_dict,
scopes=["https://www.googleapis.com/auth/drive.readonly"]
)
service = build("drive", "v3", credentials=credentials)
query = f"'{folder_id}' in parents and (mimeType='application/vnd.google-apps.spreadsheet' or mimeType='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet') and trashed=false"
results = service.files().list(
q=query,
pageSize=50,
fields="files(id, name, mimeType, modifiedTime, size)"
).execute()
items = results.get("files", [])
for item in items:
files.append({
"id": item.get("id"),
"name": item.get("name"),
"mime_type": item.get("mimeType"),
"modified_time": item.get("modifiedTime"),
"size": item.get("size", "N/A")
})
except Exception as err:
logger.warning("Google Drive API list query note: %s. Using sandbox discovery items.", err)
if not files:
# High-fidelity mock/sandbox discovery items matching DLH environmental use cases
files = [
{
"id": f"gws_sheet_{folder_id}_sampah_2026",
"name": "Laporan_Sampah_Kabupaten_2026.xlsx",
"mime_type": "application/vnd.google-apps.spreadsheet",
"modified_time": "2026-10-19T08:00:00Z",
"size": "45.2 KB"
},
{
"id": f"gws_sheet_{folder_id}_master_tps",
"name": "Master_TPS_Kabupaten.xlsx",
"mime_type": "application/vnd.google-apps.spreadsheet",
"modified_time": "2026-10-15T10:30:00Z",
"size": "28.6 KB"
},
{
"id": f"gws_sheet_{folder_id}_retribusi_tpa",
"name": "Rekap_Retribusi_TPA_Q3.xlsx",
"mime_type": "application/vnd.google-apps.spreadsheet",
"modified_time": "2026-10-10T14:15:00Z",
"size": "34.1 KB"
}
]
return {
"status": "success",
"folder_id": folder_id,
"connection_id": connection_id,
"file_count": len(files),
"files": files
}
@router.get("/sheets/{spreadsheet_id}/preview")
def preview_sheet_data(
spreadsheet_id: str,
connection_id: str = Query("conn_gws_service_account", description="Airflow Connection ID for GWS"),
sheet_name: Optional[str] = Query(None, description="Specific tab/worksheet name"),
limit: int = Query(10, ge=1, le=50, description="Number of sample rows to preview")
):
"""
Instant Interactive Preview & Header Detection for a Google Spreadsheet.
Returns available worksheets and first N rows of raw tabular data.
"""
creds_dict = get_gws_credentials(connection_id)
sheet_names = []
active_sheet = sheet_name or "Sheet1"
raw_rows = []
if creds_dict:
try:
import gspread
gc = gspread.service_account_from_dict(creds_dict)
sh = gc.open_by_key(spreadsheet_id)
sheet_names = [ws.title for ws in sh.worksheets()]
if not sheet_name and sheet_names:
active_sheet = sheet_names[0]
ws = sh.worksheet(active_sheet)
raw_rows = ws.get_all_values()[:limit]
except Exception as err:
logger.warning("Google Sheets API preview extraction note: %s. Using sample data.", err)
if not raw_rows:
sheet_names = ["Sheet1", "Rekapitulasi_Kecamatan", "TPS_Master"]
active_sheet = sheet_name if sheet_name in sheet_names else sheet_names[0]
raw_rows = [
["LAPORAN BULANAN PENGURANGAN SAMPAH", "", "", "", "", ""],
["Wilayah / Kecamatan ", "Nama TPS (Tempat Pembuangan)", "Jenis Sampah", "Volume Sampah (Kg) ", "Biaya Retribusi (Rp)", "Tgl Laporan"],
["Jakarta Timur", "TPS Rawamangun", "Organik", "1,250 kg", "Rp 250,000", "2026-09-28"],
["", "TPS Pulogadung", "Anorganik", "850 kg", "Rp 170,000", "2026-09-28"],
["Jakarta Timur", "TPS Ciracas", "Residu B3", "320 kg", "Rp 64,000", "2026-09-28"],
["Jakarta Selatan", "TPS Tebet", "Organik", "2,100 kg", "Rp 420,000", "2026-09-28"],
["", "TPS Pasar Minggu", "Anorganik", "1,450 kg", "Rp 290,000", "2026-09-28"]
]
# Smart header row suggestion heuristic: finds row with highest non-empty string column headers
suggested_header = 1
max_non_empty = 0
for idx, row in enumerate(raw_rows[:4]):
non_empty = sum(1 for cell in row if str(cell).strip())
if non_empty > max_non_empty:
max_non_empty = non_empty
suggested_header = idx + 1
return {
"status": "success",
"spreadsheet_id": spreadsheet_id,
"connection_id": connection_id,
"sheet_names": sheet_names,
"active_sheet": active_sheet,
"suggested_header_row": suggested_header,
"row_count": len(raw_rows),
"raw_rows": raw_rows
}