From 9295194c81dbafbf418201d41058d61287506378 Mon Sep 17 00:00:00 2001
From: Yannik Schmidt <yannik.schmidt@thermoscan.de>
Date: Mon, 27 Sep 2021 17:42:01 +0200
Subject: [PATCH] Initial based on telegram-http-gateway

---
 .gitignore   |  2 ++
 README.md    | 34 ++++++++++++++++++++++
 interface.py | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 req.txt      |  2 ++
 4 files changed, 119 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 README.md
 create mode 100755 interface.py
 create mode 100644 req.txt

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b37df17
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*.swp
+signal_targets.txt
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..51526d8
--- /dev/null
+++ b/README.md
@@ -0,0 +1,34 @@
+# HTTP->Telegram Gateway Notification Service
+Simplistic server to listing for HTTP queries, specifically from Icinga or Grafana and send out Signal-Messages.
+
+# Signal Setup
+- Setup signal cli
+- add the target number(s) (one per line) to signal\_targets.txt
+
+# Server Setup
+
+	usage: interface.py [-h] [--interface INTERFACE] 
+				 [--port PORT]
+				 [--signal-cli-bin SIGNAL_CLI_BIN]
+	
+	optional arguments:
+	  -h, --help            show this help message and exit
+	  --interface INTERFACE
+	                        Interface on which to listen (default: localhost)
+	  --port PORT           Port on which to listen (default: 5000)
+	  --signal-cli-bin SIGNAL_CLI_BIN
+	                        Path to signal-cli binary if no in $PATH (default: None)
+
+# HTTP Request
+The HTTP request must be a *POST*-request, with *Content-Type: application/json* and a json-field containing the key *"message"* with the value being the message you want to send.
+
+The following locations are supported:
+
+    /send-all   	# send a message to all subscribed clients
+    /send-all-icinga 	# send a message based on icinga-noficiation format
+
+# Example (curl)
+
+    curl -X POST -H "Content-Type: application/json" --data '{"message":"hallo world"}' localhost:5000/send-all
+
+
diff --git a/interface.py b/interface.py
new file mode 100755
index 0000000..8e0bed9
--- /dev/null
+++ b/interface.py
@@ -0,0 +1,81 @@
+#!/usr/bin/python3
+
+import argparse
+import flask
+import subprocess
+import os
+
+HOST = "icinga.atlantishq.de"
+SIGNAL_USER_FILE = "signal_targets.txt"
+app = flask.Flask("Signal Notification Gateway")
+
+def dbReadSignalUserFile():
+    users = []
+    with open(SIGNAL_USER_FILE, "r") as f:
+        for line in f:
+            user = line.strip()
+            if user:
+                users.append(user)
+    return users
+
+def signalSend(user, msg):
+    signalCliBin = "signal-cli"
+    if app.config["SIGNAL_CLI_BIN"]:
+        signalCliBin = app.config["SIGNAL_CLI_BIN"]
+    cmd = [signalCliBin, "send", "-m", msg, user]
+    subprocess.Popen(cmd)
+
+def sendMessageToAllClients(msg):
+    for number in dbReadSignalUserFile():
+        signalSend(number, msg)
+
+@app.route('/send-all', methods=["POST"])
+def sendToAll():
+    sendMessageToAllClients(flask.request.json["message"])
+    return ("","204")
+
+@app.route('/send-all-grafana', methods=["POST"])
+def sendToAllGrafana():
+    j = flask.request.json
+    state = j["state"]
+    if state == "ok":
+        string = "Humidity: Ok (<50%)"
+    else:
+        string = "Humidity: Warning (>50%)"
+
+    sendMessageToAllClients(string)
+    return ("","204")
+
+@app.route('/send-all-icinga', methods=["POST"])
+def sendToAllIcinga():
+    args = flask.request.json
+
+    for key in args.keys():
+        if type(args[key]) == str:
+            print(key)
+
+    # build message #
+    serviceName = args["service_name"]
+    if args["service_display_name"]:
+        serviceName = args["service_display_name"]
+
+    message = "{service} {state}\n{host}\n{output}".format(service=serviceName,
+                                                                state=args["service_state"],
+                                                                host=args["service_host"],
+                                                                output=args["service_output"])
+    sendMessageToAllClients(message)
+    return ("","204")
+
+if __name__ == "__main__":
+
+    parser = argparse.ArgumentParser(description='Simple Telegram Notification Interface',
+                        formatter_class=argparse.ArgumentDefaultsHelpFormatter)
+    parser.add_argument('--interface', default="localhost", help='Interface on which to listen')
+    parser.add_argument('--port', default="5000", help='Port on which to listen')
+    parser.add_argument("--signal-cli-bin", default=None, type=str,
+                            help="Path to signal-cli binary if no in $PATH")
+    args = parser.parse_args()
+
+    app.config["SIGNAL_CLI_BIN"] = os.path.expanduser(args.signal_cli_bin)
+
+    app.run(host=args.interface, port=args.port)
diff --git a/req.txt b/req.txt
new file mode 100644
index 0000000..3db7ef1
--- /dev/null
+++ b/req.txt
@@ -0,0 +1,2 @@
+python-telegram-bot
+flask