perf: country code api (#13672)

* perf: remove notification migrations

* perf: country code api

---------

Co-authored-by: ibuler <ibuler@qq.com>

apps/common/const/choices.py

@@ -1,11 +1,58 @@
+import phonenumbers
+import pycountry
 from django.db import models
 from django.utils.translation import gettext_lazy as _
+from phonenumbers import PhoneMetadata
 
 ADMIN = 'Admin'
 USER = 'User'
 AUDITOR = 'Auditor'
 
 
+def get_country_phone_codes():
+    phone_codes = []
+    for region_code in phonenumbers.SUPPORTED_REGIONS:
+        phone_metadata = PhoneMetadata.metadata_for_region(region_code)
+        if phone_metadata:
+            phone_codes.append((region_code, phone_metadata.country_code))
+    return phone_codes
+
+
+def get_country(region_code):
+    country = pycountry.countries.get(alpha_2=region_code)
+    if country:
+        return country
+    else:
+        return None
+
+
+def get_country_phone_choices():
+    codes = get_country_phone_codes()
+    choices = []
+    for code, phone in codes:
+        country = get_country(code)
+        if not country:
+            continue
+        country_name = country.name
+        flag = country.flag
+
+        if country.name == 'China':
+            country_name = _('China')
+
+        if code == 'TW':
+            country_name = 'Taiwan'
+            flag = get_country('CN').flag
+        choices.append({
+            'name': country_name,
+            'phone_code': f'+{phone}',
+            'flag': flag,
+            'code': code,
+        })
+
+    choices.sort(key=lambda x: x['name'])
+    return choices
+
+
 class Trigger(models.TextChoices):
     manual = 'manual', _('Manual trigger')
     timing = 'timing', _('Timing trigger')
@@ -28,17 +75,4 @@ class Language(models.TextChoices):
     jp = 'ja', '日本語',
 
 
-COUNTRY_CALLING_CODES = [
-    {'name': 'China(中国)', 'value': '+86'},
-    {'name': 'HongKong(中国香港)', 'value': '+852'},
-    {'name': 'Macao(中国澳门)', 'value': '+853'},
-    {'name': 'Taiwan(中国台湾)', 'value': '+886'},
-    {'name': 'America(America)', 'value': '+1'},
-    {'name': 'Russia(Россия)', 'value': '+7'},
-    {'name': 'France(français)', 'value': '+33'},
-    {'name': 'Britain(Britain)', 'value': '+44'},
-    {'name': 'Germany(Deutschland)', 'value': '+49'},
-    {'name': 'Japan(日本)', 'value': '+81'},
-    {'name': 'Korea(한국)', 'value': '+82'},
-    {'name': 'India(भारत)', 'value': '+91'}
-]
+COUNTRY_CALLING_CODES = get_country_phone_choices()