[IMP] mail_environment: Keep existing settings at install of module

mail_environment/__init__.py

@@ -1 +1,2 @@
 from . import models
+from .hooks import post_init_hook

mail_environment/__manifest__.py

@@ -10,4 +10,5 @@
     "license": "AGPL-3",
     "website": "https://github.com/OCA/server-env",
     "depends": ["mail", "server_environment"],
+    "post_init_hook": "post_init_hook",
 }

mail_environment/hooks.py

@@ -0,0 +1,20 @@
+def post_init_hook(env):
+    # Migrate Outgoing Mail Server data
+    env.cr.execute("SELECT * FROM ir_mail_server")
+    for row in env.cr.dictfetchall():
+        mail_server = env["ir.mail_server"].search([("name", "=", row["name"])])
+        if not mail_server:
+            continue
+        for field_name, _options in env["ir.mail_server"]._server_env_fields.items():
+            if field_name in row:
+                mail_server[field_name] = row[field_name]
+
+    # Migrate Incoming Mail Server data
+    env.cr.execute("SELECT * FROM fetchmail_server")
+    for row in env.cr.dictfetchall():
+        mail_server = env["fetchmail.server"].search([("name", "=", row["name"])])
+        if not mail_server:
+            continue
+        for field_name, _options in env["fetchmail.server"]._server_env_fields.items():
+            if field_name in row:
+                mail_server[field_name] = row[field_name]