Refactor CLI interface structure (#40)

Author: itai-codefresh

examples/cfconfig

@@ -0,0 +1,14 @@
+contexts:
+  testcontext1:
+    type: JWT
+    name: testcontext1
+    url: 'https://g.codefresh.io'
+    token: >-
+      eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJfaWQiOiI1NTJlOTQyMjM4MjQ4MzFkMDBiMWNhM2UiLCJhY2NvdW50SWQiOiI1NjgwZjEzMDM0Y2RiMzE3N2M4MmFjYjIiLCJpYXQiOjE1MTIyMzA5MDcsImV4cCI6MTUxNDgyMjkwN30.-OUq7kVLVghCjV4tp7swSzCyzPn-GR3ZF0A-aZo1ic0
+    acl-type: account
+    user-id: 552e94223824831d00b1ca3e
+    account-id: 5680f13034cdb3177c82acb2
+    expires: 1514822907
+    user-name: verchol
+    account-name: verchol_github
+current-context: testcontext1

lib/interface/cli/Command.js

@@ -0,0 +1,61 @@
+const yargs = require('yargs');
+const assert = require('assert');
+const _ = require('lodash');
+const { wrapHandler } = require('./helpers/general');
+
+class Command {
+    constructor(command) {
+        this.command = command;
+        this.subCommands = [];
+        this.builders = [];
+        (_.isUndefined(command.handler)) ? command.handler = (args) => {
+            console.log(`i am ${command.description}`);
+
+        } : _.noop();
+        (_.isUndefined(command.builder)) ? _.noop() :
+            this.addBuilder(command.builder);
+
+    }
+
+    addBuilder(b) {
+        this.builders.push(b);
+    }
+
+    subCommand(command) {
+        this.subCommands.push(command);
+        return this;
+    }
+
+    toCommand() {
+        let command = this.command;
+        //assert(_.get(this.command, "builder", true));
+
+        let funcs = _.map(this.builders, (b) => {
+            return (yargs) => {
+                b(yargs);
+                _.forEach(this.subCommands, (subCommand) => {
+                    // TODO use .toCommand here too
+                    if (subCommand instanceof Command) {
+                        yargs.command(subCommand.toCommand());
+                    } else {
+                        yargs.command(subCommand);
+                    }
+                });
+                return yargs;
+            };
+        });
+
+        let builder = (yargs) => {
+            _.flow(funcs)(yargs);
+        };
+
+        command.builder = builder;
+        command.handler = wrapHandler(command.handler);
+        return command;
+
+    }
+
+}
+
+
+module.exports = Command;