first commit

.gitignore

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+public

Dockerfile

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+FROM debian:10
+RUN apt-get update
+RUN apt-get upgrade -y
+RUN apt-get install -y \
+    php7.3-cli php-json  \
+    php-pear php-dev \
+    libmosquitto-dev libmosquitto1 mosquitto-clients \
+    php-yaml \
+    locales-all
+RUN pecl install Mosquitto-alpha
+RUN echo "extension=mosquitto.so" >/etc/php/7.3/mods-available/mosquitto.ini
+RUN ln -s /etc/php/7.3/mods-available/mosquitto.ini /etc/php/7.3/cli/conf.d/20-mosquitto.ini
+ADD . /app
+
+VOLUME /app/public
+
+
+ENTRYPOINT /app/generator.php

config.yaml

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+mqtt:
+ host: $MQTT_HOST
+ user: $MQTT_USER
+ password: $MQTT_PASSWORD
+
+variables:
+  doorstatus:
+    topic: c3re/hhdst
+    cast: bool
+  clubraum_temp:
+    topic: c3re/clubraumtemp
+    cast: float
+  werkstatt_temp:
+    topic: c3re/werkstatttemp
+    cast: float
+

generator.php

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+#!/usr/bin/env php
+<?php
+chdir(__DIR__);
+$search = [];
+$replace = [];
+foreach (getenv() as $k => $v) {
+    $search[] = "\$$k";
+    $replace[] = '"' . addslashes($v) . '"';
+}
+$conf = yaml_parse(str_replace($search, $replace, file_get_contents(__DIR__ . '/config.yaml')));
+$c = new \Mosquitto\Client();
+if (isset($conf['mqtt']['user'])) $c->setCredentials($conf['mqtt']['user'], $conf['mqtt']['password']);
+$c->onMessage(function (\Mosquitto\Message $message) use (&$data, $conf) {
+    if (!isset($data[$message->topic])) return;
+
+    switch ($data[$message->topic]['cast']) {
+        case 'int':
+            $data[$message->topic]['value'] = (int)$message->payload;
+            break;
+        case 'float':
+            $data[$message->topic]['value'] = (float)$message->payload;
+            break;
+        case 'bool':
+            $data[$message->topic]['value'] = (bool)$message->payload;
+            break;
+        default:
+            echo "error, cast type " . $data[$message->topic]['cast'] . " unknown\n";
+            die(1);
+    }
+    $search = [];
+    $replace = [];
+    foreach ($data as $v) {
+        $search[] = '"{{' . $v['name'] . '}}"';
+        $replace[] = json_encode($v['value']);
+    }
+
+    $out = str_replace($search, $replace, file_get_contents(__DIR__ . '/template.json'));
+    $out = json_encode(json_decode($out), JSON_UNESCAPED_SLASHES | JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);
+    if (!is_dir('public')) mkdir('public');
+    file_put_contents('public/spaceapi.json', $out);
+});
+$c->connect($conf['mqtt']['host']);
+$data = [];
+foreach ($conf['variables'] as $name => $variable) {
+    $data[$variable['topic']] = [
+
+        'value' => null,
+        'cast' => $variable['cast'],
+        'name' => $name
+    ];
+    $c->subscribe($variable['topic'], 2);
+}
+$c->loopForever();

template.json

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+{
+    "api":"0.13",
+    "space":"Chaostreff Recklinghausen c3RE",
+    "logo":"https://c3re.de/wp-content/uploads/logo/Logo_weiss_rund_schwarzer_Rand.png",
+    "url":"https://c3re.de",
+    "location":{
+        "address":"Westcharweg 101, 45659 Recklinghausen",
+        "lon":7.1690101828426,
+        "lat":51.62435592244
+    },
+    "contact":{
+        "twitter":"@c3_re",
+        "email":"kontakt@c3RE.de",
+        "issue_mail":"kontakt@c3RE.de"
+        },
+    "issue_report_channels":[
+        "email"
+    ],
+    "state":{
+        "open": "{{doorstatus}}"
+    },
+    "sensors": {
+   	 "temperature": [
+     	 {
+       	 	"location": "Clubraum",
+        	"unit": "°C",
+        	"value": "{{clubraum_temp}}"
+      	},
+      	{
+        	"location": "Werkstatt",
+        	"unit": "°C",
+        	"value": "{{werkstatt_temp}}"
+      	}
+    	]
+    },
+    "projects":[
+        "https://github.com/c3re",
+        "https://git.c3re.de"
+        ]
+}