added basic support for 'blinky'

config.json

@@ -19,5 +19,25 @@
   "modep": {
     "host": "192.168.1.24",
     "port": 80
+  },
+  "blinky": {
+    "enabled": true,
+    "host": "192.168.1.31",
+    "port": 3000,
+    "events": {
+      "started": {
+        "mode": "set",
+        "args": {
+          "blinkstick": "square",
+          "color": "#0f0f0f"
+        }
+      },
+      "stopped": {
+        "mode": "poweroff",
+        "args": {
+          "blinkstick": "square"
+        }
+      }
+    }
   }
 }

libs/blinky.js

@@ -0,0 +1,34 @@
+const logger = require('./logger.js');
+const { httpPOST } = require('./util.js');
+
+let enabled;
+
+async function initialize() {
+    enabled = global.config.blinky !== undefined &&
+        global.config.blinky.enabled &&
+        global.config.blinky.host !== undefined &&
+        global.config.blinky.port !== undefined &&
+        global.config.blinky.events !== undefined;
+}
+
+async function handleEvent(eventName) {
+    if (!enabled || eventName === undefined) {
+        return;
+    }
+    const event = global.config.blinky.events[eventName];
+    if (event === undefined || event.mode === undefined) {
+        return;
+    }
+    logger.info('handling blinky event \'' + eventName + '\'...');
+    try {
+        await httpPOST(global.config.blinky.host, global.config.blinky.port, event.mode, event.args);
+        logger.debug('blinky event \'' + eventName + '\' successfully handled');
+    } catch (err) {
+        logger.error('blinky event \'' + eventName + '\' encountered an error: ' + err);
+    }
+}
+
+module.exports = {
+    initialize,
+    handleEvent
+}

libs/logger.js

@@ -108,6 +108,20 @@ function error(message) {
     if (loglevel > LOGLEVEL_ERROR) {
         return;
     }
+    if (message.stack) {
+        trace(message.stack, 'error');
+        return;
+    }
+    if (message.errors !== undefined) {
+        for (let index = 0; index < message.errors.length; index++) {
+            trace(message.errors[index], 'error');
+        }
+        return;
+    }
+    if (message.message) {
+        trace(message.message, 'error');
+        return;
+    }
     trace(message, 'error');
 }
 

libs/server.js

@@ -1,21 +1,20 @@
 const config = require('../config.json');
 const logger = require('./logger.js');
 const api = require('./api.js')
-const constants = require('./constants.js');
 const modep = require('./modep.js');
+const blinky = require('./blinky.js');
 const http = require('http');
 
 var server;
 
-function start() {
-    return new Promise(function (resolve, reject) {
-        if (!server) {
-            server = http.createServer();
-        }
-        server.listen(config.server.port, config.server.listen).on('listening', function () {
-            logger.debug('server listening on ' + config.server.listen + ':' + config.server.port + '...');
-            handleRequests();
-        });
+async function start() {
+    if (!server) {
+        server = http.createServer();
+    }
+    server.listen(config.server.port, config.server.listen).on('listening', function () {
+        logger.debug('server listening on ' + config.server.listen + ':' + config.server.port + '...');
+        blinky.handleEvent('started');
+        handleRequests();
     });
 }
 

libs/util.js

@@ -2,6 +2,7 @@ const logger = require('./logger.js');
 const realpath = require('fs/promises').realpath;
 const stat = require('fs/promises').stat;
 const http = require('http');
+const querystring = require('querystring');
 const { HTTP_GET, HTTP_POST } = require('./constants.js');
 
 function timeDiff(startTime) {
@@ -32,13 +33,20 @@ function httpRequest(host, port, path, method, args) {
         if (!path.startsWith("/")) {
             path = "/" + path;
         }
-        logger.debug('sending http \'' + method + '\' request to \'' + host + ':' + port + path + '\'...');
-        const request = http.request({
+        const options = {
             hostname: host,
             port: port,
             path: path,
             method: method
-        }, function (response) {
+        };
+        if (args !== undefined) {
+            args = new URLSearchParams(args).toString();
+            options.headers = {
+                'Content-Type': 'application/x-www-form-urlencoded'
+            }
+        }
+        logger.debug('sending http \'' + method + '\' request to \'' + host + ':' + port + path + '\'...');
+        const request = http.request(options, function (response) {
             if (!response) {
                 return reject('error: no response from host for http \'' + method + '\' request \'' + host + ':' + port + path + '\'');
             }
@@ -64,8 +72,11 @@ function httpRequest(host, port, path, method, args) {
             });
         });
         request.on('error', function (err) {
-            return reject('http \'' + method + '\' request \'' + host + ':' + port + path + '\' returned an error >>> ' + err);
+            return reject('http \'' + method + '\' request \'' + host + ':' + port + path + '\' returned an error >>> ' + err.message);
         });
+        if (args !== undefined) {
+            request.write(args);
+        }
         request.end();
     });
 }
@@ -90,7 +101,7 @@ function fileExists(file) {
             .then((path) => {
                 stat(path)
                     .then((stats) => {
-                        resolve({path, stats});
+                        resolve({ path, stats });
                     })
             })
             .catch(reject);
@@ -110,6 +121,22 @@ function resolvePath(file) {
     });
 }
 
+function exit(err, code) {
+    if (code === undefined) {
+        code = 0;
+        if (err !== undefined) {
+            code = 1;
+        }
+    }
+    if (err) {
+        logger.error(err);
+        logger.error(global.appName + ' ' + global.appVersion + ' ended due to an error');
+    } else {
+        logger.info(global.appName + ' ' + global.appVersion + ' shutting down gracefully')
+    }
+    process.exit(code);
+}
+
 module.exports = {
     timeDiff,
     clone,
@@ -118,5 +145,6 @@ module.exports = {
     toHex,
     sortById,
     fileExists,
-    resolvePath
+    resolvePath,
+    exit
 }

pbc.js

@@ -2,10 +2,13 @@ const logger = require('./libs/logger.js');
 const api = require('./libs/api.js');
 const server = require('./libs/server.js')
 const util = require('./libs/util.js');
+const blinky = require('./libs/blinky.js');
 const packageJSON = require('./package.json');
 
 const INTERRUPTS = ['SIGINT', 'SIGTERM'];
 
+global.appName = packageJSON.name;
+global.appVersion = packageJSON.version;
 global.config = process.argv[2] || __dirname + '/config.json';
 
 handleInterrupts();
@@ -16,22 +19,21 @@ util.fileExists(config)
         global.config.path = result.path;
     })
     .then(logger.initialize)
+    .then(blinky.initialize)
     .then(() => {
         logger.info("launching " + packageJSON.name + " " + packageJSON.version);
     })
     .then(api.setupEndpoints)
     .then(server.start)
     .catch((err) => {
-        logger.error(err);
-        process.exit(1);
+        util.exit(err);
     });
 
 function handleInterrupts() {
     for (var index = 0; index < INTERRUPTS.length; index++) {
-        process.once(INTERRUPTS[index], (code) => {
-            watchers.stop()
-                .then(exit(code))
-                .catch(exit(code));
+        process.once(INTERRUPTS[index], async (code) => {
+            await blinky.handleEvent('stopped');
+            util.exit(undefined, code);
         });
     }
 }