MXS-1300: Add module commands to MaxCtrl

Added inspection of module commands to MaxCtrl. The commands can't be
called yet.

client/maxctrl/common.js

@@ -53,6 +53,40 @@ module.exports = function() {
         })
     }
 
+    // Request a part of a resource as a collection
+    this.getSubCollection = function (resource, subres, fields) {
+
+        doRequest(resource, function(res) {
+
+            var header = []
+
+            fields.forEach(function(i) {
+                header.push(Object.keys(i))
+            })
+
+            var table = getTable(header)
+
+            _.getPath(res.data, subres, []).forEach(function(i) {
+                row = []
+
+                fields.forEach(function(p) {
+                    var v = _.getPath(i, p[Object.keys(p)[0]], '')
+
+                    if (Array.isArray(v) && typeof(v[0]) != 'object') {
+                        v = v.join(', ')
+                    } else if (typeof(v) == 'object') {
+                        v = JSON.stringify(v, null, 4)
+                    }
+                    row.push(v)
+                })
+
+                table.push(row)
+            })
+
+            console.log(table.toString())
+        })
+    }
+
     // Request a single resource and format it as a key-value list
     this.getResource = function (resource, fields) {
 

client/maxctrl/lib/list.js

@@ -70,6 +70,12 @@ exports.builder = function(yargs) {
                 {'Name':'id'}
             ])
         })
+        .command('commands', 'List module commands', {}, function() {
+            getCollection('maxscale/modules',[
+                {'Module':'id'},
+                {'Commands': 'attributes.commands[].id'}
+            ])
+        })
         .usage('Usage: list <command>')
         .help()
         .command('*', 'the default command', {}, () => {

client/maxctrl/lib/show.js

@@ -93,6 +93,13 @@ exports.builder = function(yargs) {
                 {'Uptime': 'attributes.uptime'}
             ])
         })
+        .command('commands <module>', 'Show module commands of a module', {}, function(argv) {
+            getSubCollection('maxscale/modules/' + argv.module, 'attributes.commands', [
+                {'Command': 'id'},
+                {'Parameters': 'attributes.parameters[].type'},
+                {'Descriptions': 'attributes.parameters[].description'}
+            ])
+        })
         .usage('Usage: show <command>')
         .help()
         .command('*', 'the default command', {}, () => {