Add basic LDAP bind functionality

app/unit/LDAPControllerUnit.js

@@ -0,0 +1,60 @@
+const CanonicalUnit = require('libflitter/canon/CanonicalUnit')
+const LDAPController = require('../ldap/controllers/LDAPController')
+const StopError = require('libflitter/errors/StopError')
+
+class LDAPControllerUnit extends CanonicalUnit {
+    static get name() {
+        return 'ldap_controllers'
+    }
+
+    static get services() {
+        return [...super.services, 'output']
+    }
+
+    constructor(base_directory = './app/ldap/controllers') {
+        super(base_directory)
+
+        this.canonical_item = 'ldap_controller'
+        this.suffix = '.controller.js'
+    }
+
+    async init_canonical_file({app, name, instance}) {
+        if ( instance.prototype instanceof LDAPController ) {
+            this.output.debug(`Registering LDAP controller: ${name}`)
+            return new instance()
+        } else {
+            this.output.error(`LDAP Controller ${name} must extend base class LDAPController.`)
+            throw new StopError(`LDAP Controller ${name} must extend base class LDAPController.`)
+        }
+    }
+
+    /**
+     * Resolve an unqualified canonical name to a registered canonical controller or method.
+     * @param {string} name
+     // * @returns {module:libflitter/controller/Controller~Controller|function}
+     */
+    get(name) {
+        const name_parts = name.split('.')
+        const controller_instance = this.canonical_items[name_parts[0]]
+
+        if ( name_parts.length > 1 ) {
+            const method_instance = controller_instance[name_parts[1]].bind(controller_instance)
+
+            if ( name_parts > 2 ) {
+                let descending_value = method_instance
+                name_parts.slice(2).forEach(part => {
+                    descending_value = descending_value[part]
+                })
+
+                return descending_value
+            } else {
+                return method_instance
+            }
+        }
+
+        // TODO this is a bug in libflitter too!
+        return controller_instance
+    }
+}
+
+module.exports = exports = LDAPControllerUnit