feat: add support for APRS Service Registry (#57)

* feat: add support for APRS Service Registry

This adds support for adding the bot to the APRS Service registry using
the standard setup by WB4BOR for his HEMNA registry https://aprs.hemna.com/

By default, registry is off. This PR also adds documentation of all of
the config options, including the ones related to enabling registry
pings.

* ci: ruff format

Author: andrewthetechie

.pre-commit-config.yaml

@@ -7,13 +7,15 @@ repos:
       - id: debug-statements
       - id: end-of-file-fixer
       - id: trailing-whitespace
-  - repo: https://github.com/charliermarsh/ruff-pre-commit
+  - repo: https://github.com/astral-sh/ruff-pre-commit
     # Ruff version.
-    rev: "v0.3.3"
+    rev: v0.4.2
     hooks:
+      # Run the linter.
       - id: ruff
-        args: [--fix, --exit-non-zero-on-fix]
-        types: [python]
+        args: [ --fix ]
+      # Run the formatter.
+      - id: ruff-format
   - repo: https://github.com/rhysd/actionlint
     rev: v1.6.27
     hooks:

CONFIG.md

@@ -0,0 +1,21 @@
+# err-aprs-backend config options
+
+These options can be set in your errbot config.py to configure the APRS backend.
+
+* APRS_FROM_CALLSIGN - default is your bot identity callsign, but you can set to reply as a different callsign
+* APRS_LISTENED_CALLSIGNS - default (), set of callsigns to listen to
+* APRS_HELP_TEXT - default "APRSBot,Errbot & err-aprs-backend", set this to your text. Probably a good idea to set it to website for complex help text due to message character limits
+* APRS_MAX_DROPPED_PACKETS - default "25", how many packets we can drop before the bot backend will restart
+* APRS_MAX_CACHED_PACKETS - default "2048", how many packets to hold in the cache to dedupe.
+* APRS_MAX_AGE_CACHED_PACETS_SECONDS - default "3600", how long to hold onto a package in the cache for deduping
+* APRS_MESSAGE_MAX_RETRIES - default "7", how many times to retry sending a message if the bot does do not get an ack or a rej
+* APRS_MESSAGE_RETRY_WAIT - default "90", how many seconds to wait between retrying message sending
+* APRS_STRIP_NEWLINES - default "true", strip newlines out of plugin responses, probably best to leave it as true
+* APRS_LANGUAGE_FILTER - default "true", attempts to strip any profanity out of a message before sending it so the FCC doesn't get mad. Not a smart filter, very brute force. You are still responsible for what you transmit!
+* APRS_LANGUAGE_FILTER_EXTRA_WORDS - default [], list of extra words to drop as profanity.
+* APRS_REGISTRY_ENABLED - default "false", if true, will enable reporting to the APRS Service Registry https://aprs.hemna.com/
+* APRS_REGISTRY_URL - default "https://aprs.hemna.com/api/v1/registry", the APRS registry to report your service
+* APRS_REGISTRY_FREQUENCY_SECONDS - default "3600", how often in seconds to report your service to the APRS registry
+* APRS_REGISTRY_DESCRIPTION - default "err-aprs-backend powered bot", description for your bot in the Service Regsitry
+* APRS_REGISTRY_WEBSTIRE - default "", website for your service on the APRS registry
+* APRS_REGISTRY_SOFTWARE - default "err-aprs-backend {version} errbot {errbot version}", software string for APRS service registry

README.md

@@ -69,6 +69,8 @@ BOT_IDENTITY = {
 }
 ```
 
+See [CONFIG.md](CONFIG.md) for more configuration options
+
 ### Disable the default plugins
 
 The default plugins allow configuring the bot, installing plugins, and returing detailed help information. These don't work well over APRS because
@@ -92,7 +94,7 @@ SUPPRESS_CMD_NOT_FOUND = True
 
 ### Bot Prefix
 You can leave your bot prefix on, but that's just extra characters. I prefer to make it optional so users don't have to
-send it on every commadn
+send it on every command
 
 ```python
 BOT_PREFIX_OPTIONAL_ON_CHAT = True

aprs_backend/__init__.py

@@ -1,3 +1,4 @@
 from .aprs import APRSBackend
+from .version import __version__
 
-__all__ = ["APRSBackend"]
+__all__ = ["APRSBackend", "__version__"]

aprs_backend/aprs.py

@@ -4,6 +4,7 @@
 from aprs_backend.clients import APRSISClient
 from aprs_backend.person import APRSPerson
 from aprs_backend.room import APRSRoom
+from aprs_backend.version import __version__ as ERR_APRS_VERSION
 from errbot.backends.base import Message
 from errbot.backends.base import ONLINE
 from errbot.core import ErrBot
@@ -18,20 +19,18 @@
 from random import randint
 from datetime import datetime
 from better_profanity import profanity
-from errbot import botcmd
-
+from aprs_backend.clients.aprs_registry import APRSRegistryClient, RegistryAppConfig
 import logging
 import asyncio
+from errbot.version import VERSION as ERR_VERSION
 
 
 log = logging.getLogger(__name__)
 
 for handler in log.handlers:
-    handler.setFormatter(logging.Formatter('%(filename)s: '
-                                '%(levelname)s: '
-                                '%(funcName)s(): '
-                                '%(lineno)d:\t'
-                                '%(message)s'))
+    handler.setFormatter(
+        logging.Formatter("%(filename)s: " "%(levelname)s: " "%(funcName)s(): " "%(lineno)d:\t" "%(message)s")
+    )
 
 
 class ProcessorError(APRSBackendException):
@@ -63,40 +62,61 @@ def __init__(self, config):
         self._multiline = False
         self._client = APRSISClient(**aprs_config, logger=log)
         self._send_queue = asyncio.Queue(maxsize=int(getattr(self._errbot_config, "APRS_SEND_MAX_QUEUE", "2048")))
-        self.help_text = getattr(self._errbot_config, "APRS_HELP_TEXT", "APRS Bot provided by Errbot.")
+        self.help_text = getattr(self._errbot_config, "APRS_HELP_TEXT", "APRSBot,Errbot & err-aprs-backend")
 
         self._message_counter = MessageCounter(initial_value=randint(1, 20))  # nosec not used cryptographically
-        self._max_dropped_packets = int(getattr(self._errbot_config, "APRS_MAX_DROPPED_PACKETS", "25"))
-        self._max_cached_packets = int(getattr(self._errbot_config, "APRS_MAX_CACHED_PACKETS", "2048"))
-        self._message_max_retry = int(getattr(self._errbot_config, "APRS_MESSAGE_MAX_RETRIES", "7"))
-        self._message_retry_wait = int(getattr(self._errbot_config, "APRS_MESSAGE_RETRY_WAIT", "90"))
+        self._max_dropped_packets = int(self._get_from_config("APRS_MAX_DROPPED_PACKETS", "25"))
+        self._max_cached_packets = int(self._get_from_config("APRS_MAX_CACHED_PACKETS", "2048"))
+        self._message_max_retry = int(self._get_from_config("APRS_MESSAGE_MAX_RETRIES", "7"))
+        self._message_retry_wait = int(self._get_from_config("APRS_MESSAGE_RETRY_WAIT", "90"))
 
         # strip newlines out of plugin responses before sending to aprs, probably best to leave it true, nothing in aprs will handle
         # a stray newline
-        self._strip_newlines = str(getattr(self._errbot_config, "APRS_STRIP_NEWLINES", "true")).lower() == "true"
+        self._strip_newlines = str(self._get_from_config("APRS_STRIP_NEWLINES", "true")).lower() == "true"
 
         # try to strip out "foul" language the FCC would not like. It is possible/probably an errbot bot response could
         # go out over the airwaves. This is configurable, but probably should remain on.
-        self._language_filter = str(getattr(self._errbot_config, "APRS_LANGUAGE_FILTER", "true")).lower() == "true"
+        self._language_filter = str(self._get_from_config("APRS_LANGUAGE_FILTER", "true")).lower() == "true"
         if self._language_filter:
-            profanity.load_censor_words(getattr(self._errbot_config, "APRS_LANGUAGE_FILTER_EXTRA_WORDS", []))
+            profanity.load_censor_words(self._get_from_config("APRS_LANGUAGE_FILTER_EXTRA_WORDS", []))
 
-        self._max_age_cached_packets_seconds = int(getattr(self._errbot_config, "APRS_MAX_AGE_CACHED_PACETS_SECONDS", "3600"))
-        self._packet_cache = ExpiringDict(max_len=self._max_cached_packets, max_age_seconds=self._max_age_cached_packets_seconds)
+        self._max_age_cached_packets_seconds = int(self._get_from_config("APRS_MAX_AGE_CACHED_PACETS_SECONDS", "3600"))
+        self._packet_cache = ExpiringDict(
+            max_len=self._max_cached_packets, max_age_seconds=self._max_age_cached_packets_seconds
+        )
         self._packet_cache_lock = asyncio.Lock()
-        self._waiting_ack = ExpiringDict(max_len=self._max_cached_packets, max_age_seconds=self._max_age_cached_packets_seconds)
+        self._waiting_ack = ExpiringDict(
+            max_len=self._max_cached_packets, max_age_seconds=self._max_age_cached_packets_seconds
+        )
         self._waiting_ack_lock = asyncio.Lock()
 
-        super().__init__(config)
+        self.registry_enabled = self._get_from_config("APRS_REGISTRY_ENABLED", "false").lower() == "true"
+        if self.registry_enabled:
+            self.registry_app_config = RegistryAppConfig(
+                description=self._get_from_config("APRS_REGISTRY_DESCRIPTION", "err-aprs-backend powered bot"),
+                website=self._get_from_config("APRS_REGISTRY_WEBSITE", ""),
+                listening_callsigns=[self.from_call] + [call for call in self.listened_callsigns],
+                software=self._get_from_config(
+                    "APRS_REGISTRY_SOFTWARE", f"err-aprs-backend {ERR_APRS_VERSION} errbot {ERR_VERSION}"
+                ),
+            )
+            if (registry_software := self._get_from_config("APRS_REGISTRY_SOFTWARE", None)) is not None:
+                self.registry_app_config.software = registry_software
+            self.registry_client = APRSRegistryClient(
+                registry_url=self._get_from_config("APRS_REGISTRY_URL", "https://aprs.hemna.com/api/v1/registry"),
+                log=log,
+                frequency_seconds=int(self._get_from_config("APRS_REGISTRY_FREQUENCY_SECONDS", "3600")),
+                app_config=self.registry_app_config,
+            )
+        else:
+            self.registry_client = None
 
-    @botcmd
-    def testcmd(self, msg: Message) -> str:
-        return "test successful"
+        super().__init__(config)
 
+    def _get_from_config(self, key: str, default: any = None) -> any:
+        return getattr(self._errbot_config, key, default)
 
-    def build_reply(
-        self, msg: Message, text: str, private: bool = False, threaded: bool = False
-    ) -> Message:
+    def build_reply(self, msg: Message, text: str, private: bool = False, threaded: bool = False) -> Message:
         log.debug(msg)
         reply = Message(
             body=text,
@@ -161,7 +181,6 @@ async def retry_worker(self) -> None:
             # release the loop for a bit longer after we've gone through all keys
             await asyncio.sleep(0.1)
 
-
     async def send_worker(self) -> None:
         """Processes self._send_queue to send messages to APRS"""
         log.debug("send_worker started")
@@ -184,8 +203,7 @@ async def send_worker(self) -> None:
             await asyncio.sleep(0.01)
 
     async def receive_worker(self) -> bool:
-        """_summary_
-        """
+        """_summary_"""
         log.debug("Receive worker started")
         try:
             await self._client.connect()
@@ -211,13 +229,25 @@ async def receive_worker(self) -> bool:
                         if parsed_packet.to == self.callsign or parsed_packet.to in self.listened_callsigns:
                             await self.process_packet(parsed_packet)
                         else:
-                            log.info("Packet was not addressed to bot or listened callsigns, not processing %s", packet_str)
+                            log.info(
+                                "Packet was not addressed to bot or listened callsigns, not processing %s", packet_str
+                            )
                     else:
                         log.info("This packet parsed to be None: %s", packet_str)
                 except PacketParseError as exc:
-                    log.error("Dropping packet %s due to Parsing error: %s. Total Dropped Packets: %s", packet_str, exc, self._dropped_packets)
+                    log.error(
+                        "Dropping packet %s due to Parsing error: %s. Total Dropped Packets: %s",
+                        packet_str,
+                        exc,
+                        self._dropped_packets,
+                    )
                 except ProcessorError as exc:
-                    log.err("Dropping packet %s due to Processor error: %s. Total Dropped Packets: %s", packet_str, exc, self._dropped_packets)
+                    log.err(
+                        "Dropping packet %s due to Processor error: %s. Total Dropped Packets: %s",
+                        packet_str,
+                        exc,
+                        self._dropped_packets,
+                    )
                 finally:
                     self._dropped_packets += 1
                     if self._dropped_packets > self._max_dropped_packets:
@@ -232,10 +262,10 @@ async def receive_worker(self) -> bool:
     async def async_serve_once(self) -> bool:
         receive_task = asyncio.create_task(self.receive_worker())
 
-        worker_tasks = [
-            asyncio.create_task(self.send_worker()),
-            asyncio.create_task(self.retry_worker())
-            ]
+        worker_tasks = [asyncio.create_task(self.send_worker()), asyncio.create_task(self.retry_worker())]
+        # if reporting to the aprs service registry is enabled, start a task for it
+        if self.registry_client is not None:
+            worker_tasks.append(asyncio.create_task(self.registry_client()))
         result = await asyncio.gather(receive_task, return_exceptions=True)
         await self._send_queue.join()
         for task in worker_tasks:
@@ -281,7 +311,7 @@ def send_message(self, msg: Message) -> None:
             addresse=msg.to.callsign,
             message_text=msg_text,
             msgNo=msgNo,
-            last_send_attempt=last_send_attempt
+            last_send_attempt=last_send_attempt,
         )
         msg_packet._build_raw()
         try:
@@ -334,10 +364,7 @@ async def __drop_message_from_waiting(self, message_hash: str) -> None:
 
     def handle_help(self, msg: APRSMessage) -> None:
         """Returns simplified help text for the APRS backend"""
-        help_msg = APRSMessage(
-            body=self.help_text,
-            extras=msg.extras
-            )
+        help_msg = APRSMessage(body=self.help_text, extras=msg.extras)
         help_msg.to = msg.frm
         help_msg.frm = APRSPerson(callsign=self.from_call)
         self.send_message(help_msg)
@@ -363,11 +390,9 @@ async def _process_message(self, packet: MessagePacket) -> None:
 
     async def _ack_message(self, packet: MessagePacket) -> None:
         log.debug("Sending ack for packet %s", packet.json)
-        this_ack = AckPacket(from_call=self.from_call,
-                             to_call=packet.from_call,
-                             addresse=packet.from_call,
-                             msgNo=packet.msgNo
-                             )
+        this_ack = AckPacket(
+            from_call=self.from_call, to_call=packet.from_call, addresse=packet.from_call, msgNo=packet.msgNo
+        )
         await this_ack.prepare(self._message_counter)
         this_ack.update_timestamp()
         await self._client._send(this_ack.raw)

aprs_backend/clients/__init__.py

@@ -1,4 +1,5 @@
 from .aprsis import APRSISClient
 from .kiss import KISSClient
+from .aprs_registry import APRSRegistryClient, RegistryAppConfig
 
-__all__ = ["APRSISClient", "KISSClient"]
+__all__ = ["APRSISClient", "KISSClient", "APRSRegistryClient", "RegistryAppConfig"]

aprs_backend/clients/aprs_registry.py

@@ -0,0 +1,69 @@
+from dataclasses import dataclass
+import httpx
+from functools import cached_property
+import asyncio
+
+
+@dataclass
+class RegistryAppConfig:
+    description: str
+    listening_callsigns: list[str]
+    website: str = ""
+    software: str = ""
+
+    @cached_property
+    def post_jsons(self) -> list[dict]:
+        return [
+            {
+                "callsign": str(this_call),
+                "description": self.description,
+                "service_website": self.website,
+                "software": self.software,
+            }
+            for this_call in self.listening_callsigns
+        ]
+
+
+class APRSRegistryClient:
+    def __init__(self, registry_url: str, app_config: RegistryAppConfig, log, frequency_seconds: int = 3600) -> None:
+        self.registry_url = registry_url
+        self.log = log
+        self.frequency_seconds = frequency_seconds
+        self.app_config = app_config
+
+    async def __call__(self) -> None:
+        """Posts to the aprs registry url for each listening callsign for the bot
+        Run as an asyncio task
+        """
+        self.log.debug("Staring APRS Registry Client")
+        try:
+            while True:
+                async with httpx.AsyncClient() as client:
+                    for post_json in self.app_config.post_jsons:
+                        self.log.debug("Posting %s to %s", post_json, self.registry_url)
+                        try:
+                            response = await client.post(self.registry_url, json=post_json)
+                            self.log.debug(response)
+                            response.raise_for_status()
+                        except httpx.RequestError as exc:
+                            self.log.error(
+                                "Request Error while posting %s to %s. Error: %s, response: %s",
+                                post_json,
+                                self.registry_url,
+                                exc,
+                                response,
+                            )
+                        except httpx.HTTPStatusError as exc:
+                            self.log.error(
+                                "Error while posting %s to %s. Error: %s, response: %s",
+                                post_json,
+                                self.registry_url,
+                                exc,
+                                response,
+                            )
+                # instead of sleeping in one big chunk, sleep in smaller chunks for easier cacnellation
+                for i in range(self.frequency_seconds * 10):
+                    await asyncio.sleep(0.1)
+        except asyncio.CancelledError:
+            self.log.info("APRS client cancelled, stopping")
+            return