add mcc table

carriers/mcc-table.schema.json

@@ -0,0 +1,33 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "title": "MCC Table",
+  "type": "array",
+  "items": {
+    "$ref": "#/definitions/entry"
+  },
+  "definitions": {
+    "entry": {
+      "type": "object",
+      "properties": {
+        "mcc": {
+          "type": "string",
+          "description": "The Mobile Country Code"
+        },
+        "iso": {
+          "type": "string",
+          "description": "The ISO country code associated with the MCC code"
+        },
+        "smallestDigitsMCC": {
+          "type": "number",
+          "description": "The smallest number of digits in the MNC code"
+        }
+      },
+      "additionalProperties": false,
+      "required": [
+        "mcc",
+        "iso",
+        "smallestDigitsMCC"
+      ]
+    }
+  }
+}

download.py

@@ -9,7 +9,7 @@
 from requests import Session
 from requests_cache import CachedSession
 
-from handlers import google, mccmnc_dot_net, mccmnc_dot_com
+from handlers import google, mccmnc_dot_net, mccmnc_dot_com, mcc_table
 from handlers.database import db
 from handlers.rebuild import rebuild_carriers, export_carriers
 from handlers.utils import CustomEncoder, emit_file
@@ -34,6 +34,8 @@ def main():
         save_file(list(export_carriers()), name="unified")
         print("Downloading from Google")
         save_file(list(google.fetch(session)), name="google")
+        save_file(list(mcc_table.fetch(session)), name="mcc-table")
+
 
 
 def save_file(carriers: list[dict[str, str]], name: str):

handlers/__init__.py

@@ -1,5 +1,6 @@
 __all__ = [
     "google",
     "mccmnc_dot_net",
-    "mccmnc_dot_com"
+    "mccmnc_dot_com",
+    "mcc_table",
 ]

handlers/mcc_table.py

@@ -0,0 +1,32 @@
+import base64
+import os
+import re
+from urllib.parse import urljoin
+
+import requests
+
+BASE_URL = "https://android.googlesource.com/platform/frameworks/opt/telephony/"
+BRANCH = "HEAD"
+FILEPATH = "src/java/com/android/internal/telephony/MccTable.java"
+
+RE_MCC_ENTRY = re.compile(r"new MccEntry\((?P<mcc>\d+), \"(?P<iso>\w+)\", (?P<n>\d+)\)")
+
+
+def fetch(session: requests.Session):
+    response = session.get(
+        url=urljoin(BASE_URL, os.path.join("+", BRANCH, FILEPATH)),
+        params={"format": "TEXT"},
+    )
+    response.raise_for_status()
+    codeblock = base64.decodebytes(response.content).decode("utf-8")
+
+    entries = [
+        {
+            "mcc": entry.group("mcc"),
+            "iso": entry.group("iso").upper(),
+            "smallestDigitsMCC": int(entry.group("n")),
+        }
+        for entry in RE_MCC_ENTRY.finditer(codeblock)
+    ]
+
+    return sorted(entries, key=lambda _: int(_["mcc"]))

npm/carriers/mcc-table.json.d.ts

@@ -0,0 +1,5 @@
+import type {google} from "./types";
+
+declare const entries: readonly google.MCCEntry[];
+
+export = entries;

npm/carriers/types.ts

@@ -40,4 +40,10 @@ export namespace google {
         readonly iccid_prefix?: readonly string[];
         readonly privilege_access_rule?: readonly string[];
     }
+
+    export interface MCCEntry {
+        readonly mcc: string;
+        readonly iso: string;
+        readonly smallestDigitsMCC: number;
+    }
 }