added most of the combo functionality

README.md

@@ -48,8 +48,13 @@ configuration is done entirely within the file `config.json`.
 - level: [*string*] verbosity of the log; either `debug`, `info`, `warning` or `error`  
 - timestamp: [*string*] format string for the timestamp; review [moment.js](https://momentjs.com/docs/#/displaying/format/) for further information
 
+### socket: [*object*]
+- location: [*string*] path to the socket file; defaults to `/tmp/ninwa.sock`
+
 ### watchers: [*object-array*]  
 - device: [*string*] name of or path to an input device; ninwa automatically tries to locate the device in `/dev/input` and `/dev/input/by-id/` if only a name is given  
+- restart: [*boolean*] restart watcher on close
+- grep: [*string*] pre-filter evtest's output with grep
 - keys: [*object-array*]  
     - key: [*string*] name of the key
     - type: [*string*] type of the key event; either `keyup`, `keydown` or `keyhold`

config.json

@@ -7,8 +7,21 @@
     {
       "device": "usb-Razer_Razer_Blade_Stealth-if01-event-kbd",
       "restart": true,
-      "grep": "EV_KEY",
       "keys": [
+        {
+          "key": "key_f1",
+          "combo": [
+            "key_f2",
+            "key_f3"
+          ],
+          "event": "EV_KEY",
+          "type": "keydown",
+          "command": "notify-send",
+          "args": [
+            "combo",
+            "{{ key }} {{ type }}"
+          ]
+        },
         {
           "key": "key_enter",
           "type": "keydown",

libs/cli.js

@@ -1,10 +1,14 @@
 const logger = require('./logger.js');
 const spawn = require('child_process').spawn;
 
-function execute(command, args) {
+async function execute(command, args, returnOnClose) {
-    return new Promise((resolve, reject) => {
+    // return new Promise((resolve, reject) => {
-        if (command == undefined || command.length == 0) {
+        if (command === undefined || command.length === 0) {
-            reject();
+            return;
+            // reject();
+        }
+        if (returnOnClose === undefined) {
+            returnOnClose = false;
         }
         var startTime = new Date().getTime();
         var resultData = "";
@@ -22,6 +26,16 @@ function execute(command, args) {
         process.stderr.on('data', (data) => {
             resultError += data;
         });
+        process.on('spawn', () => {
+            logger.info('spawned command \'' + command + '\' (args: \'' + args + '\')');
+            if (!returnOnClose) {
+                return;
+            }
+        });
+        process.on('error', (err) => {
+            throw new Error(err);
+            // resultError += err;
+        });
         process.on('close', (code) => {
             var msg = 'command \'' + command + '\' (args: \'' + args + '\') finished with exit code ' + code + ' after ' + (new Date().getTime() - startTime) + 'ms';
             if (resultData.length > 0) {
@@ -29,14 +43,16 @@ function execute(command, args) {
             }
             if (resultError.length > 0) {
                 msg += " >>> error: " + resultError;
-                reject(msg);
+                throw new Error(msg);
+                // reject(msg);
             }
-            resolve(msg);
+            if (returnOnClose) {
-        });
+                return;
-        process.on('error', (err) => {
+            }
-            resultError += err;
+            // resolve(msg);
-        });
         });
+
+    // });
 }
 
 module.exports = {

libs/keyfilter.js

@@ -1,4 +1,4 @@
-const FILTER_START = 'Testing ... (interrupt to exit)';
+const LINE_START = 'Event: time';
 
 const ACTION_KEYUP = { id: 0, action: 'keyup' };
 const ACTION_KEYDOWN = { id: 1, action: 'keydown' };
@@ -8,15 +8,19 @@ const VARIABLE_KEY = '{{ key }}';
 const VARIABLE_TYPE = '{{ type }}';
 
 class Keyfilter {
-    constructor(config) {
+    constructor(keys, combos) {
-        if (config == undefined || config.length == 0) {
+        if ((keys === undefined || keys.length === 0) && (combos === undefined || combos.length === 0)) {
             return;
         }
         this.actions = new Map();
-        for (var index = 0; index < config.length; index++) {
+        for (var index = 0; index < keys.length; index++) {
-            var grep = config[index].grep;
+            this.setAction(keys[index]);
+        }
+        this.currentCombo = undefined;
+    }
+    setAction(config) {
         var type = ACTION_KEYDOWN;
-            switch (config[index].type.toLowerCase()) {
+        switch (config.type.toLowerCase()) {
             case ACTION_KEYUP.action:
                 type = ACTION_KEYUP;
                 break;
@@ -24,53 +28,98 @@ class Keyfilter {
                 type = ACTION_KEYHOLD;
                 break;
         }
-            var command = config[index].command;
+        this.actions.set(config.key.toUpperCase(),
-            var args = config[index].args;
+            {
-            var delay = config[index].delay;
+                type: type,
-            this.actions.set(config[index].key.toUpperCase(), { grep, type, command, args, delay });
+                event: config.event,
+                command: config.command,
+                args: config.args,
+                combo: config.combo,
+                delay: function () {
+                    if (config.combo === undefined) {
+                        return config.delay;
                     }
+                    return config.delay || 1000;
+                }(),
             }
-    filterActive(input) {
+        );
-        if (this.active) {
-            return true;
-        }
-        input = input.toString();
-        var index = input.indexOf(FILTER_START);
-        if (index == -1) {
-            return;
-        }
-        input = input.substring(index + FILTER_START.length).trim();
-        this.active = true;
-        return true;
     }
     filter(input) {
-        if (input == undefined || input.length == 0) {
+        if (input === undefined || input.length === 0) {
             return;
         }
         input = input.toString();
-        if (!this.filterActive(input)) {
-            return;
-        }
         var lines = input.split("\n");
         for (var index = 0; index < lines.length; index++) {
             var line = lines[index];
-            if (line.length == 0) {
+            if (line.length === 0) {
                 continue;
             }
-            for (var [key, value] of this.actions) {
+            if (!line.startsWith(LINE_START)) {
-                if (!line.includes(key)) {
                 continue;
             }
-                if (!line.endsWith('value ' + value.type.id)) {
+            const parsedEvent = this.parseLine(line);
+            if (parsedEvent === undefined) {
                 continue;
             }
-                var action = this.actions.get(key);
+            for (var [key, event] of this.actions) {
-                if (this.shouldBeDelayed(action)) {
+                if (this.currentCombo === undefined && !this.isParsedEventValid(key, event, parsedEvent)) {
-                    return { key: key, type: action.type.action, delayed: true };
+                    continue;
                 }
-                action.captured = new Date().getTime();
+                if (this.isStartOfCombo(key, event)) {
-                return this.replaceVariables({ key: key, type: action.type.action, command: action.command, args: action.args });
+                    return this.getFilterResult(key, event, 'combo', this.currentCombo);
                 }
+                if (this.isPartOfCombo(parsedEvent)) {
+                    if (parsedEvent.ignore) {
+                        continue;
+                    }
+                    const result = this.getFilterResult(key, event, 'combo', this.currentCombo);
+                    if (this.hasComboFinished()) {
+                        this.resetCurrentCombo();
+                    }
+                    return result;
+                }
+                if (!this.isParsedEventValid(key, event, parsedEvent)) {
+                    continue;
+                }
+                if (this.shouldBeDelayed(event)) {
+                    return this.getFilterResult(key, event, 'delayed', true);
+                }
+                event.captured = new Date().getTime();
+                return this.getFilterResult(key, event);
+            }
+        }
+    }
+    isParsedEventValid(key, value, parsed) {
+        return key === parsed.key && (value.event === undefined || value.event === parsed.event) && value.type.id === parsed.type;
+    }
+    getFilterResult(key, event, extraName, extra) {
+        if (key === undefined || event === undefined) {
+            return;
+        }
+        let result = this.replaceVariables(
+            {
+                key: key,
+                type: event.type.action,
+                command: event.command,
+                args: event.args,
+                delay: event.delay
+            }
+        )
+        if (extraName !== undefined && extra !== undefined) {
+            result[extraName] = extra;
+        }
+        return result;
+    }
+    parseLine(line) {
+        try {
+            const parts = line.split(',');
+            const event = parts[1].substring(parts[1].indexOf('(') + 1, parts[1].lastIndexOf(')'));
+            const key = parts[2].substring(parts[2].indexOf('(') + 1, parts[2].indexOf(')'));
+            const type = parseInt(parts[3].split(' ').pop());
+            return { event: event, key: key, type: type };
+        } catch (err) {
+            return;
         }
     }
     replaceVariables(filtered) {
@@ -80,15 +129,68 @@ class Keyfilter {
         }
         return filtered;
     }
-    shouldBeDelayed(action) {
+    shouldBeDelayed(event) {
-        if (action.delay == undefined || action.delay == 0 || action.captured == undefined) {
+        if (event.delay === undefined || event.delay === 0 || event.captured === undefined) {
             return false;
         }
-        return new Date().getTime() - action.captured < action.delay;
+        return new Date().getTime() - event.captured < event.delay;
+    }
+    isStartOfCombo(key, event) {
+        if (this.currentCombo !== undefined || event.combo === undefined) {
+            return false;
+        }
+        this.currentCombo = {
+            key: key,
+            type: event.type,
+            start: new Date().getTime(),
+            done: [key],
+            remaining: JSON.parse(JSON.stringify(event.combo)),
+            finished: this.hasComboFinished()
+        };
+        return true;
+    }
+    isPartOfCombo(parsedEvent) {
+        if (this.hasComboTimedOut()) {
+            this.resetCurrentCombo();
+        }
+        if (this.currentCombo === undefined) {
+            return false;
+        }
+        if (this.currentCombo.done.includes(parsedEvent.key)) {
+            parsedEvent.ignore = true;
+            return true;
+        }
+        if (this.currentCombo.type.id !== parsedEvent.type) {
+            return false;
+        }
+        if (this.currentCombo.remaining[0].toUpperCase() !== parsedEvent.key) {
+            return false;
+        }
+        this.currentCombo.key = parsedEvent.key;
+        this.currentCombo.done.push(parsedEvent.key);
+        this.currentCombo.remaining.shift();
+        this.currentCombo.finished = this.hasComboFinished();
+        return true;
+    }
+    hasComboFinished() {
+        return this.currentCombo !== undefined &&
+            this.currentCombo.remaining !== undefined &&
+            this.currentCombo.remaining.length === 0;
+    }
+    hasComboTimedOut() {
+        return this.currentCombo !== undefined &&
+            this.currentCombo.delay !== undefined &&
+            this.currentCombo.start !== undefined &&
+            new Date().getTime() - this.currentCombo.start > this.currentCombo.delay;
+    }
+    resetCurrentCombo() {
+        this.currentCombo = undefined;
     }
     isValid() {
         return this.actions != undefined && this.actions.size > 0;
     }
 }
 
+
+
 module.exports = Keyfilter;

libs/watcher.js

@@ -15,9 +15,8 @@ class Watcher {
         for (var key in config) {
             this[key] = config[key];
         }
-        this.keyfilter = new Keyfilter(config.keys);
+        this.keyfilter = new Keyfilter(config.keys, config.combos);
         this.restart = config.restart;
-        this.grep = config.grep;
         this.callback = callback;
     }
     start() {
@@ -26,11 +25,7 @@ class Watcher {
                 return;
             }
             logger.debug('starting watcher \'' + this.device + '\'...');
-            var args = [this.device];
+            this.process = spawn("evtest", [this.device]);
-            if (this.grep) {
-                args.push('|', 'grep', this.grep);
-            }
-            this.process = spawn("evtest", args);
             this.attachListeners(resolve, reject);
         });
     }
@@ -65,11 +60,18 @@ class Watcher {
             if (filtered == undefined) {
                 return;
             }
-            var msg = 'watcher \'' + this.device + '\' captured event';
             if (filtered.delayed) {
                 logger.debug('delaying captured \'' + filtered.type + '\' event for \'' + filtered.key + '\' from watcher \'' + this.device + '\'');
                 return;
             }
+            if (filtered.combo) {
+                if (!filtered.combo.finished) {
+                    logger.debug('captured \'' + filtered.combo.type.action + '\' event for \'' + filtered.combo.key + '\' from watcher \'' + this.device + '\' is part of a combo (next key: \'' + filtered.combo.remaining[0] + '\')');
+                    return;
+                }
+                logger.debug('captured \'' + filtered.combo.type.action + '\' event for \'' + filtered.combo.key + '\' from watcher \'' + this.device + '\' is the last part of a combo');
+            }
+            this.keyfilter.resetCurrentCombo();
             logger.info('executing command \'' + filtered.command + '\' (args: \'' + filtered.args + '\') registered for captured \'' + filtered.type + '\' event for \'' + filtered.key + '\' from watcher \'' + this.device + '\'');
             cli.execute(filtered.command, filtered.args)
                 .then(logger.info)