Generate cron and env files for getmail migration

imageroot/actions/import-module/40migration

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+#!/usr/bin/env python3
+
+#
+# Copyright (C) 2023 Nethesis S.r.l.
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+
+import json
+import uuid
+import os
+import sys
+
+file_path = './getmail.json'
+
+with open(file_path, 'r') as file:
+    data = json.load(file)
+
+# Extract properties for type "getmail" with unique IDs
+getmail_properties = []
+
+for entry in data:
+    if entry['type'] == 'getmail':
+        props = entry['props']
+        unique_id = str(uuid.uuid4())[:6]
+        properties = {
+            'ID': unique_id,
+            'Account': props.get('Account',''),
+            'Password': props.get('Password', ''),
+            'Server': props.get('Server',''),
+            'Username': props.get('Username',''),
+            'Retriever': props.get('Retriever',''),
+            'Delete': props.get('Delete', ''),
+            'Time': props.get('Time', ''),
+            'Status': props.get('status', ''),
+            'FilterCheck': props.get('FilterCheck', '')
+        }
+        if properties['Account'] == "":
+            print("Account: no argument given", file=sys.stderr)
+            continue                # skip empty accounts
+        elif properties['Password'] == "":
+            print("Password: no argument given", file=sys.stderr)
+            continue                # skip accounts without password
+        elif properties['Server'] == "":
+            print("Server: no argument given", file=sys.stderr)
+            continue                # skip accounts without server
+        elif properties['Username'] == "":
+            print("Username: no argument given", file=sys.stderr)
+            continue                # skip accounts without username
+        elif properties['Retriever'] == "":
+            print("Retriever: no argument given", file=sys.stderr)
+            continue            # skip accounts without retriever
+        getmail_properties.append(properties)
+
+# iterate over keys and write tasks files
+for properties in getmail_properties:
+    task_id = properties['ID']
+    localuser = properties['Account'].split('@')[0]
+    remotehostname = properties['Server']
+    # convert getmail protocol to imapsync protocol
+    if properties['Retriever'] == "SimplePOP3Retriever":
+        remoteport = "143"
+        security = ""
+        # Pop3 to IMAP not sure it will work, we disable
+        cron = ""
+    elif properties['Retriever'] == "SimplePOP3SSLRetriever":
+        remoteport = "993"
+        security = "--ssl1"
+        # Pop3 to IMAP not sure it will work, we disable
+        cron = ""
+    elif properties['Retriever'] == "SimpleIMAPRetriever":
+        remoteport = '143'
+        security = ''
+        cron = properties['Time']
+    elif properties['Retriever'] == "SimpleIMAPSSLRetriever":
+        remoteport = '993'
+        security = '--ssl1'
+        cron = properties['Time']
+    remoteusername = properties['Username']
+    remotepassword = properties['Password']
+
+    # options not available in getmail, we disable for validation
+    delete_local = ""
+    delete_folder = ""
+
+    # delete on remote once migrated
+    delete_remote = properties['Delete']
+
+    # in imapsync we just have an option to remove it immediately
+    if delete_remote != "-1":
+        delete_remote = "--delete1"
+        expunge_remote = "--noexpungeaftereach"
+    else:
+        delete_remote = ""
+        expunge_remote = ""
+
+    # not available in getmail, we disable for validation
+    exclude = ""
+
+    # cron
+    if cron != "":
+        if cron == '60':
+            cron_env = "1 */1 * * *  root /usr/local/bin/syncctl start "+localuser+'_'+task_id
+            cron = '1h'
+        else:
+            cron_env = "*/"+cron+" * * * * root /usr/local/bin/syncctl start "+localuser+'_'+task_id
+            cron = cron + 'm'
+        f = open("./cron/"+localuser+'_'+task_id+".cron", "w", encoding="utf-8")
+        # MAIL_HOST is an env variable used by perl/imapsync 
+        f.write('MAIL_HOST='+os.environ['MAIL_HOST']+"\n")
+        f.write(cron_env+"\n")
+        f.close()
+
+    foldersynchronization = "inbox"
+    folder_inbox = "--folder\ 'INBOX'"
+
+    user_env = f"""
+TASK_ID={task_id}
+LOCALUSER={localuser}
+REMOTEUSERNAME={remoteusername}
+REMOTEHOSTNAME={remotehostname}
+REMOTEPORT={remoteport}
+SECURITY={security}
+DELETE_LOCAL={delete_local}
+DELETEFOLDER={delete_folder}
+EXCLUDE={exclude}
+DELETE_REMOTE={delete_remote}
+EXPUNGE_REMOTE={expunge_remote}
+CRON={cron}
+FOLDER_INBOX={folder_inbox}
+FOLDERSYNCHRONIZATION={foldersynchronization}
+    """
+    os.umask(0o77)
+
+    f = open("./imapsync/"+localuser+'_'+task_id+".env", "w", encoding="utf-8")
+    f.write(user_env)
+    f.close()
+
+    f = open("./imapsync/"+localuser+'_'+task_id+".pwd", "w", encoding="utf-8")
+    f.write(remotepassword)
+    f.close()
+
+# Remove the file
+os.remove(file_path)
+print(f"File {file_path} removed.", file=sys.stderr)