More work towards support moving/deleting instance

Makefile

@@ -17,3 +17,7 @@ update:
 .PHONY: prune-old-data
 prune-old-data:
 	-docker run --volume `pwd`/data:/app/data --volume `pwd`/app/static:/app/app/static microblogpub/microblogpub inv prune-old-data
+
+.PHONY: webfinger
+webfinger:
+	-docker run --volume `pwd`/data:/app/data --volume `pwd`/app/static:/app/app/static microblogpub/microblogpub inv webfinger $(account)

app/activitypub.py

@@ -9,6 +9,7 @@ from loguru import logger
 from markdown import markdown
 
 from app import config
+from app.config import ALSO_KNOWN_AS
 from app.config import AP_CONTENT_TYPE  # noqa: F401
 from app.httpsig import auth
 from app.key import get_pubkey_as_pem
@@ -126,6 +127,9 @@ ME = {
     "tag": _LOCAL_ACTOR_TAGS,
 }
 
+if ALSO_KNOWN_AS:
+    ME["alsoKnownAs"] = [ALSO_KNOWN_AS]
+
 
 class NotAnObjectError(Exception):
     def __init__(self, url: str, resp: httpx.Response | None = None) -> None:

app/config.py

@@ -87,6 +87,7 @@ class Config(pydantic.BaseModel):
     blocked_servers: list[_BlockedServer] = []
     custom_footer: str | None = None
     emoji: str | None = None
+    also_known_as: str | None = None
 
     inbox_retention_days: int = 15
 
@@ -135,6 +136,7 @@ if CONFIG.privacy_replace:
     PRIVACY_REPLACE = {pr.domain: pr.replace_by for pr in CONFIG.privacy_replace}
 
 BLOCKED_SERVERS = {blocked_server.hostname for blocked_server in CONFIG.blocked_servers}
+ALSO_KNOWN_AS = CONFIG.also_known_as
 
 INBOX_RETENTION_DAYS = CONFIG.inbox_retention_days
 CUSTOM_FOOTER = (

app/main.py

@@ -251,6 +251,7 @@ async def index(
     page: int | None = None,
 ) -> templates.TemplateResponse | ActivityPubResponse:
     if is_activitypub_requested(request):
+
         return ActivityPubResponse(LOCAL_ACTOR.ap_actor)
 
     page = page or 1

app/webfinger.py

@@ -29,6 +29,7 @@ async def webfinger(
 
     is_404 = False
 
+    resp: httpx.Response | None = None
     async with httpx.AsyncClient() as client:
         for i, proto in enumerate(protos):
             try:
@@ -59,7 +60,10 @@ async def webfinger(
     if is_404:
         return None
 
-    return resp.json()
+    if resp:
+        return resp.json()
+    else:
+        return None
 
 
 async def get_remote_follow_template(resource: str) -> str | None:

docs/user_guide.md

@@ -235,6 +235,42 @@ All the data generated by the server is located in the `data/` directory:
 
 Restoring is as easy as adding your backed up `data/` directory into a fresh deployment.
 
+## Moving from another instance
+
+If you want to move followers from your existing account, ensure it is supported in your software documentation.
+
+For [Mastodon you can look at Moving or leaving accounts](https://docs.joinmastodon.org/user/moving/).
+
+First you need to grab the "ActivityPub actor URL" for your existing account:
+
+### Python edition
+
+```bash
+# For a Python install
+poetry run inv webfinger username@domain.tld
+```
+
+Edit the config.
+
+### Docker edition
+
+```bash
+# For a Docker install
+make account=username@domain.tld webfinger
+```
+
+Edit the config.
+
+#### Edit the config
+
+And add a reference to your old/existing account in `profile.toml`:
+
+```toml
+also_known_as = "my@old-account.com"
+```
+
+Restart the server, and you should be able to complete the move from your existing account.
+
 ## Tasks
 
 ### Pruning old data
@@ -280,3 +316,48 @@ make prune-old-data
 docker compose up -d
 rm data/microblogpub.db.bak
 ```
+
+### Moving to another instance
+
+**This section is just a draft.**
+
+If you want to migrate to another instance, you have the ability to move your existing followers to your new account.
+
+Your new account should reference the existing one, refer to your software configuration (for example [Moving or leaving accounts from the Mastodon doc](https://docs.joinmastodon.org/user/moving/)).
+
+Execute the Move task:
+
+#### Python edition
+
+```bash
+# For a Python install
+poetry run inv move username@domain.tld
+```
+
+#### Docker edition
+
+```bash
+# For a Docker install
+make account=username@domain.tld move
+```
+
+### Deleting the instance
+
+**This section is just a draft.**
+
+You want to delete your instance, you can request other instances to delete your remote profile.
+Once deleted, you won't be able to use your instance anymore.
+
+#### Python edition
+
+```bash
+# For a Python install
+poetry run inv self-destruct
+```
+
+#### Docker edition
+
+```bash
+# For a Docker install
+make self-destruct
+```

tasks.py

@@ -190,6 +190,35 @@ def prune_old_data(ctx):
     asyncio.run(run_prune_old_data())
 
 
+@task
+def webfinger(ctx, account):
+    # type: (Context, str) -> None
+    import traceback
+
+    from loguru import logger
+
+    from app.source import _MENTION_REGEX
+    from app.webfinger import get_actor_url
+
+    logger.disable("app")
+    if not account.startswith("@"):
+        account = f"@{account}"
+    if not _MENTION_REGEX.match(account):
+        print(f"Invalid acccount {account}")
+        return
+
+    print(f"Resolving {account}")
+    try:
+        maybe_actor_url = asyncio.run(get_actor_url(account))
+        if maybe_actor_url:
+            print(f"SUCCESS: {maybe_actor_url}")
+        else:
+            print(f"ERROR: Failed to resolve {account}")
+    except Exception as exc:
+        print(f"ERROR: Failed to resolve {account}")
+        print("".join(traceback.format_exception(exc)))
+
+
 @task
 def yunohost_config(
     ctx,