Feature/collecte de plusieurs annees pour le dataset edc

pipelines/tasks/_common.py

@@ -11,6 +11,8 @@
 os.makedirs(DATABASE_FOLDER, exist_ok=True)
 
 
-def clear_cache():
+def clear_cache(recreate_folder: bool = True):
     """Clear the cache folder."""
     shutil.rmtree(CACHE_FOLDER)
+    if recreate_folder:
+        os.makedirs(CACHE_FOLDER, exist_ok=True)

pipelines/tasks/build_database.py

@@ -4,6 +4,7 @@
 
 import logging
 import os
+from typing import Dict, List, Literal
 from zipfile import ZipFile
 
 import duckdb
@@ -14,48 +15,176 @@
 logger = logging.getLogger(__name__)
 
 
-def process_sise_eaux_dataset_2024():
-    """Process SISE-Eaux dataset for 2024."""
+def check_table_existence(conn: duckdb.DuckDBPyConnection, table_name: str) -> bool:
+    """
+    Check if a table exists in the duckdb database
+    :param conn: The duckdb connection to use
+    :param table_name: The table name to check existence
+    :return: True if the table exists, False if not
+    """
+    query = f"""
+        SELECT COUNT(*)
+        FROM information_schema.tables
+        WHERE table_name = '{table_name}'
+        """
+    conn.execute(query)
+    return list(conn.fetchone())[0] == 1
+
+
+def get_yearly_dataset_infos(year: str) -> Dict[str, str]:
+    """
+    Returns information for yearly dataset extract of the SISE Eaux datasets.
+    The data comes from https://www.data.gouv.fr/fr/datasets/resultats-du-controle-sanitaire-de-leau-distribuee-commune-par-commune/
+    For each year a dataset is downloadable on a URL like this (ex. 2024):
+        https://www.data.gouv.fr/fr/datasets/r/84a67a3b-08a7-4001-98e6-231c74a98139
+    The id of the dataset is the last part of this URL
+    The name of the dataset is dis-YEAR.zip (but the format could potentially change).
+    :param year: The year from which we want to get the dataset information.
+    :return: A dict with the id and name of the dataset.
+    """
+    dis_files_info_by_year = {
+        "2024": {"id": "84a67a3b-08a7-4001-98e6-231c74a98139", "name": "dis-2024.zip"},
+        "2023": {"id": "c89dec4a-d985-447c-a102-75ba814c398e", "name": "dis-2023.zip"},
+        "2022": {"id": "a97b6074-c4dd-4ef2-8922-b0cf04dbff9a", "name": "dis-2022.zip"},
+        "2021": {"id": "d2b432cc-3761-44d3-8e66-48bc15300bb5", "name": "dis-2021.zip"},
+        "2020": {"id": "a6cb4fea-ef8c-47a5-acb3-14e49ccad801", "name": "dis-2020.zip"},
+        "2019": {"id": "861f2a7d-024c-4bf0-968b-9e3069d9de07", "name": "dis-2019.zip"},
+        "2018": {"id": "0513b3c0-dc18-468d-a969-b3508f079792", "name": "dis-2018.zip"},
+        "2017": {"id": "5785427b-3167-49fa-a581-aef835f0fb04", "name": "dis-2017.zip"},
+        "2016": {"id": "483c84dd-7912-483b-b96f-4fa5e1d8651f", "name": "dis-2016.zip"},
+    }
+    return dis_files_info_by_year[year]
+
+
+def download_extract_insert_yearly_SISE_data(year: str):
+    """
+    Downloads from www.data.gouv.fr the SISE-Eaux dataset for one year, extract the files and insert into duckdb
+    :param year: The year from which we want to download the dataset
+    :return: Create or replace the associated tables in the duckcb database.
+        It adds the column "annee_prelevement" based on year as an integer.
+    """
+
+    yearly_dataset_info = get_yearly_dataset_infos(year=year)
 
     # Dataset specific constants
-    DATA_URL = (
-        "https://www.data.gouv.fr/fr/datasets/r/84a67a3b-08a7-4001-98e6-231c74a98139"
-    )
-    ZIP_FILE = os.path.join(CACHE_FOLDER, "dis-2024.zip")
-    EXTRACT_FOLDER = os.path.join(CACHE_FOLDER, "raw_data_2024")
+    DATA_URL = f"https://www.data.gouv.fr/fr/datasets/r/{yearly_dataset_info['id']}"
+    ZIP_FILE = os.path.join(CACHE_FOLDER, yearly_dataset_info["name"])
+    EXTRACT_FOLDER = os.path.join(CACHE_FOLDER, f"raw_data_{year}")
 
     FILES = {
-        "communes": {"filename": "DIS_COM_UDI_2024.txt", "table": "sise_communes"},
-        "prelevements": {"filename": "DIS_PLV_2024.txt", "table": "sise_prelevements"},
-        "resultats": {"filename": "DIS_RESULT_2024.txt", "table": "sise_resultats"},
+        "communes": {
+            "filename_prefix": f"DIS_COM_UDI_",
+            "file_extension": ".txt",
+            "table_name": f"sise_communes",
+        },
+        "prelevements": {
+            "filename_prefix": f"DIS_PLV_",
+            "file_extension": ".txt",
+            "table_name": f"sise_prelevements",
+        },
+        "resultats": {
+            "filename_prefix": f"DIS_RESULT_",
+            "file_extension": ".txt",
+            "table_name": f"sise_resultats",
+        },
     }
 
-    logger.info("Downloading and extracting SISE-Eaux dataset for 2024...")
+    logger.info(f"Processing SISE-Eaux dataset for {year}...")
     response = requests.get(DATA_URL, stream=True)
     with open(ZIP_FILE, "wb") as f:
         for chunk in response.iter_content(chunk_size=8192):
             f.write(chunk)
 
-    logger.info("Extracting files...")
+    logger.info("   Extracting files...")
     with ZipFile(ZIP_FILE, "r") as zip_ref:
         zip_ref.extractall(EXTRACT_FOLDER)
 
-    logger.info("Creating tables in the database...")
+    logger.info("   Creating or updating tables in the database...")
     conn = duckdb.connect(DUCKDB_FILE)
+
     for file_info in FILES.values():
-        filepath = os.path.join(EXTRACT_FOLDER, file_info["filename"])
-        query = f"""
-            CREATE OR REPLACE TABLE {file_info["table"]} AS 
-            SELECT * FROM read_csv('{filepath}', header=true, delim=',');
+        filepath = os.path.join(
+            EXTRACT_FOLDER,
+            f"{file_info['filename_prefix']}{year}{file_info['file_extension']}",
+        )
+
+        if check_table_existence(conn=conn, table_name=f"{file_info['table_name']}"):
+            query = f"""
+                DELETE FROM {f"{file_info['table_name']}"}
+                WHERE annee_prelevement = CAST({year} as INTEGER)
+                ;
+            """
+            conn.execute(query)
+            query_start = f"INSERT INTO {f'{file_info["table_name"]}'} "
+
+        else:
+            query_start = f"CREATE TABLE {f'{file_info["table_name"]}'} AS "
+
+        query_select = f"""
+            SELECT 
+                *,
+                CAST({year} as INTEGER) AS annee_prelevement
+            FROM read_csv('{filepath}', header=true, delim=',');
         """
-        conn.execute(query)
+
+        conn.execute(query_start + query_select)
+
     conn.close()
 
-    logger.info("Cleaning up...")
+    logger.info("   Cleaning up cache...")
     clear_cache()
 
     return True
 
 
+def process_sise_eaux_dataset(
+    refresh_type: Literal["all", "last", "custom"] = "all",
+    custom_years: List[str] = None,
+):
+    """
+    Process the SISE eaux dataset.
+    :param refresh_type: Refresh type to run
+        - "all": Refresh the data for every possible year
+        - "last": Refresh the data only for the last available year
+        - "custom": Refresh the data for the years specified in the list custom_years
+    :param custom_years: years to update
+    :return:
+    """
+    available_years = [
+        "2016",
+        "2017",
+        "2018",
+        "2019",
+        "2020",
+        "2021",
+        "2022",
+        "2023",
+        "2024",
+    ]
+
+    if refresh_type == "all":
+        years_to_update = available_years
+    elif refresh_type == "last":
+        years_to_update = available_years[-1]
+    elif refresh_type == "custom":
+        if custom_years:
+            years_to_update = list(set(custom_years).intersection(available_years))
+        else:
+            raise ValueError(
+                """ custom_years parameter needs to be specified if refresh_type="custom" """
+            )
+
+    logger.info(
+        f"Launching processing of SISE-Eaux dataset for years: {years_to_update}"
+    )
+
+    for year in years_to_update:
+        download_extract_insert_yearly_SISE_data(year=year)
+
+    logger.info("Cleaning up cache...")
+    clear_cache(recreate_folder=False)
+    return True
+
+
 def execute():
-    process_sise_eaux_dataset_2024()
+    process_sise_eaux_dataset()