split code into functions

adsms.py

@@ -1,4 +1,7 @@
 #!/usr/bin/env python3
+
+# Partially written with ChatGPT 
+
 import os
 import time
 import json
@@ -6,18 +9,13 @@ import sqlite3
 import argparse
 import requests
 
-parser = argparse.ArgumentParser()
-parser.add_argument("config_file")
-args = parser.parse_args()
 
-with open(args.config_file) as f:
-    config = json.load(f)
+def load_config(config_file):
+    with open(config_file) as f:
+        return json.load(f)
 
-try:
-    if config["pid_file"]:
-        with open(config["pid_file"], "w+") as f:
-            f.write(str(os.getpid()))
 
+def load_database(config):
     con = sqlite3.connect(config["database"])
 
     con.execute(
@@ -25,38 +23,63 @@ try:
     )
     con.commit()
 
+    return con
+
+
+def update_last_seen_time(con, sub_id):
+    con.execute(
+        "UPDATE subscriptions SET last_seen = ? WHERE rowid = ?", (time.time(), sub_id)
+    )
+
+
+def send_text_message(phone, message, key):
+    request = {"phone": phone, "message": message, "key": key}
+    resp = requests.post("https://textbelt.com/text", request)
+    print(resp.json())
+
+
+def process_subscriptions(con, config, data):
+    cur = con.execute(
+        "SELECT rowid, phone, icao, description, last_seen FROM subscriptions"
+    )
+
+    for sub_id, phone, icao, description, last_seen in cur.fetchall():
+        if icao in data and data[icao]["seen"] < config["max_age"]:
+            if last_seen + config["min_disappearance"] < time.time():
+                message = f"{description}\n{config['tracker']}?icao={icao}"
+
+                send_text_message(phone, message, config["textbelt_key"])
+
+                print(f"{phone}: {message}")
+
+                update_last_seen_time(con, sub_id)
+
+    con.commit()
+
+
+def get_current_data(config):
+    response = requests.get(config["data"])
+    planes = response.json()["aircraft"]
+    return {plane["hex"]: plane for plane in planes}
+
+
+def run(config):
+    con = load_database(config)
+
     while True:
-        response = requests.get(config["data"])
+        data = get_current_data(config)
 
-        planes = response.json()["aircraft"]
-        data = {plane["hex"]: plane for plane in planes}
-
-        cur = con.execute(
-            "SELECT rowid, phone, icao, description, last_seen FROM subscriptions"
-        )
-        for sub_id, phone, icao, description, last_seen in cur.fetchall():
-            if icao in data and data[icao]["seen"] < config["max_age"]:
-                if last_seen + config["min_disappearance"] < time.time():
-                    message = f"{description}\n{config['tracker']}?icao={icao}"
-
-                    request = {
-                        "phone": phone,
-                        "message": message,
-                        "key": config["textbelt_key"],
-                    }
-
-                    resp = requests.post("https://textbelt.com/text", request)
-
-                    print(f"{phone}: {message}")
-                    print(resp.json())
-
-                con.execute(
-                    "UPDATE subscriptions SET last_seen = ? WHERE rowid = ?",
-                    (time.time(), sub_id),
-                )
-        con.commit()
+        process_subscriptions(con, config, data)
 
         time.sleep(config["delay"])
-finally:
-    if config["pid_file"]:
-        os.unlink(config["pid_file"])
+
+    con.close()
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("config_file")
+    args = parser.parse_args()
+
+    config = load_config(args.config_file)
+    run(config)