Migrate Sendgrid templates between different accounts

migrate-templates.py

"""
Migrates SendGrid templates from one account to another.

Requires a `.env` file with the following variables:
- SOURCE_SENDGRID_API_KEY
- DESTINATION_SENDGRID_API_KEY

There is not much error handling here. This is not a place of honor.
It turned out to run quite smoothly still.
"""

import dotenv
import json
import os
import sendgrid

dotenv.load_dotenv()

src_sg = sendgrid.SendGridAPIClient(os.environ.get("SOURCE_SENDGRID_API_KEY"))
dst_sg = sendgrid.SendGridAPIClient(os.environ.get("DESTINATION_SENDGRID_API_KEY"))

#
# Retrieve all "transactional" emails from the source account
#
response = src_sg.client.templates.get()
json_str = response.body.decode("utf-8")
templates = json.loads(json_str)
templates = templates["templates"]

for template in templates:

    """
    {'generation': 'legacy',
     'id': 'c1ebf23f-935d-4925-89bd-340d6176fa33',
     'name': 'Template name here',
     'updated_at': '2019-01-29 10:17:34',
     'versions': [{'active': 1,
                   'editor': 'code',
                   'generate_plain_content': True,
                   'id': '9f600f14-2e35-4b04-8497-21330586cda5',
                   'name': 'Untitled_11548757058978',
                   'subject': 'Subject of your email',
                   'template_id': 'c1ebf23f-935d-4925-89bd-340d6176fa33',
                   'updated_at': '2019-01-29 10:18:19'}]}
    """

    template_id = template["id"]
    new_template = {
        "id": template_id,
        "generation": template["generation"],
        "name": template["name"],
    }

    # Create the new template in the destination account
    response = dst_sg.client.templates.post(request_body=new_template)

    """
    b'{"id":"98cc9f3c-c6a5-4c59-9848-8852d310a3a1",
    "name":"Template name here",
    "generation":"legacy",
    "updated_at":"2024-05-08 12:40:05",
    "versions":[]}\n'
    """
    json_str = response.body.decode('utf-8')
    new_template_object = json.loads(json_str)
    new_template_id = new_template_object["id"]

    """
    {'active': 1,
     'editor': 'code',
     'generate_plain_content': True,
     'html_content': 'Hi *|template_variable|*,\n ...'
     'id': '9f600f14-2e35-4b04-8497-21330586cda5',
     'name': 'Untitled_11548757058978',
     'plain_content': 'Hi *|template_variable|*,\n ... ',
     'subject': 'Subject of your email',
     'template_id': 'c1ebf23f-935d-4925-89bd-340d6176fa33',
     'updated_at': '2019-01-29 10:18:19'
    }
    """

    for version in template["versions"]:
        version_id = version["id"]

        response = src_sg.client.templates._(template_id).versions._(version_id).get()
        json_str = response.body.decode('utf-8')
        version_object = json.loads(json_str)

        response = dst_sg.client.templates._(new_template_id).versions.post(
            request_body={
                "active": version["active"],
                "generate_plain_content": version_object["generate_plain_content"],
                "html_content": version_object["html_content"],
                "name": version["name"],
                "plain_content": version_object["plain_content"],
                "subject": version["subject"],
                "template_id": new_template_id,
                "updated_at": version["updated_at"],
            }
        )

    # Print the new template name and ID, in case there's some
    # configuration to be updated somewhere
    print(template["name"] + "\t" + new_template_id)