routing for desk, error handling, test for router

backends/rest_client.js

@@ -1,7 +1,7 @@
 const frappe = require('frappe-core');
 const path = require('path');
 
-class RESTClient {
+module.exports = class RESTClient {
     constructor({server, protocol='http'}) {
         this.server = server;
         this.protocol = protocol;
@@ -124,7 +124,3 @@ class RESTClient {
     }
 
 }
-
-module.exports = {
-    Database: RESTClient
-}

client/desk/index.js

@@ -1,10 +1,14 @@
 const frappe = require('frappe-core');
 const Search = require('./search');
-const Router = require('./router');
+const Router = require('frappe-core/common/router');
+const Page = require('frappe-core/client/view/page');
+const List = require('frappe-core/client/view/list');
+const Form = require('frappe-core/client/view/form');
 
 module.exports = class Desk {
     constructor() {
         frappe.router = new Router();
+        frappe.router.listen();
 
         this.wrapper = document.querySelector('.desk');
 
@@ -15,20 +19,67 @@ module.exports = class Desk {
         this.main = frappe.ui.add('div', 'main', this.body);
 
         this.sidebar_items = [];
-        this.list_pages = {};
-        this.edit_pages = {};
+        this.pages = {
+            lists: {},
+            forms: {}
+        };
+
+        this.init_routes();
 
         // this.search = new Search(this.nav);
     }
 
     init_routes() {
-        frappe.router.on('list/:doctype', (params) => {
-
-        })
-        frappe.router.on('edit/:doctype/:name', (params) => {
+        frappe.router.add('list/:doctype', async (params) => {
+            let page = this.get_list_page(params.doctype);
+            await page.show(params);
+        });
 
+        frappe.router.add('edit/:doctype/:name', async (params) => {
+            let page = this.get_form_page(params.doctype);
+            await page.show(params);
         })
 
+        frappe.router.add('new/:doctype', async (params) => {
+            let doc = await frappe.get_new_doc(params.doctype);
+            frappe.router.set_route('edit', doc.doctype, doc.name);
+        });
+
+    }
+
+    get_list_page(doctype) {
+        if (!this.pages.lists[doctype]) {
+            let page = new Page('List ' + doctype);
+            page.list = new List({
+                doctype: doctype,
+                parent: page.body
+            });
+            page.on('show', async () => {
+                await page.list.run();
+            });
+            this.pages.lists[doctype] = page;
+        }
+        return this.pages.lists[doctype];
+    }
+
+    get_form_page(doctype) {
+        if (!this.pages.forms[doctype]) {
+            let page = new Page('Edit ' + doctype);
+            page.form = new Form({
+                doctype: doctype,
+                parent: page.body
+            });
+            page.on('show', async (params) => {
+                try {
+                    page.doc = await frappe.get_doc(params.doctype, params.name);
+                    page.form.use(page.doc);
+                } catch (e) {
+                    page.render_error(e.status_code, e.message);
+                }
+            });
+            this.pages.forms[doctype] = page;
+        }
+        return this.pages.forms[doctype];
     }
 
     add_sidebar_item(label, action) {

client/desk/router.js

@@ -1,82 +0,0 @@
-const frappe = require('frappe-core');
-
-module.exports = class Router {
-    constructor() {
-        this.current_page = null;
-        this.static_routes = {};
-        this.dynamic_routes = {};
-        this.listen();
-    }
-
-    add(route, handler) {
-        let page = {handler: handler};
-
-        // '/todo/:name/:place'.match(/:([^/]+)/g);
-        page.param_keys = route.match(/:([^/]+)/g);
-
-        if (page.param_keys) {
-            // make expression
-            // '/todo/:name/:place'.replace(/\/:([a-z1-9]+)/g, "\/([a-z0-9]+)");
-            page.expression = route.replace(/\/:([a-z1-9]+)/g, "\/([a-z0-9]+)");
-            this.dynamic_routes[route] = page;
-        } else {
-            this.static_routes[route] = page;
-        }
-
-    }
-
-    listen() {
-        window.onhashchange = this.changed.bind(this);
-        this.changed();
-    }
-
-    async changed(event) {
-        if (window.location.hash.length > 0) {
-            const page_name = window.location.hash.substr(1);
-            this.show(page_name);
-        } else if (this.static_routes['default']) {
-            this.show('default');
-        }
-    }
-
-    show(route) {
-        if (!route) {
-            route = 'default';
-        }
-
-        if (route[0]==='#') {
-            route = route.substr(1);
-        }
-
-        let page = this.match(route);
-
-        if (page) {
-            if (typeof page.handler==='function') {
-                page.handler(page.params);
-            } else {
-                page.handler.show(page.params);
-            }
-        }
-    }
-
-    match(route) {
-        for(let key in this.static_routes) {
-            if (key === route) {
-                return {handler: this.static_routes[key].handler};
-            }
-        }
-
-        for(let key in this.dynamic_routes) {
-            let page = this.dynamic_routes[key];
-            let matches = route.match(new RegExp(page.expression));
-
-            if (matches && matches.length == page.param_keys.length + 1) {
-                let params = {}
-                for (let i=0; i < page.param_keys.length; i++) {
-                    params[page.param_keys[i].substr(1)] = matches[i + 1];
-                }
-                return {handler:page.handler, params: params};
-            }
-        }
-    }
-}

client/index.js

@@ -1,5 +1,5 @@
 const common = require('frappe-core/common');
-const Database = require('frappe-core/backends/rest_client').Database;
+const RESTClient = require('frappe-core/backends/rest_client');
 const frappe = require('frappe-core');
 frappe.ui = require('./ui');
 const Desk = require('./desk');
@@ -11,7 +11,9 @@ module.exports = {
         common.init_libs(frappe);
 
         frappe.fetch = window.fetch.bind();
-        frappe.db = await new Database({server: server});
+        frappe.db = await new RESTClient({server: server});
+
+        frappe.flags.cache_docs = true;
 
         frappe.desk = new Desk();
         await frappe.login();

client/view/form.js

@@ -1,7 +1,7 @@
 const frappe = require('frappe-core');
 const controls = require('./controls');
 
-class Form {
+module.exports = class Form {
     constructor({doctype, parent, submit_label='Submit'}) {
         this.parent = parent;
         this.doctype = doctype;
@@ -85,7 +85,7 @@ class Form {
 
     async submit() {
         try {
-            if (this.is_new) {
+            if (this.is_new || this.doc.__not_inserted) {
                 await this.doc.insert();
             } else {
                 await this.doc.update();
@@ -104,5 +104,3 @@ class Form {
     }
 
 }
-
-module.exports = {Form: Form};

client/view/list.js

@@ -1,6 +1,6 @@
 const frappe = require('frappe-core');
 
-class ListView {
+module.exports = class List {
     constructor({doctype, parent, fields}) {
         this.doctype = doctype;
         this.parent = parent;
@@ -118,7 +118,3 @@ class ListView {
     }
 
 };
-
-module.exports = {
-    ListView: ListView
-};

client/view/page.js

@@ -1,6 +1,6 @@
 const frappe = require('frappe-core');
 
-class Page {
+module.exports = class Page {
     constructor(title) {
         this.handlers = {};
         this.title = title;
@@ -8,12 +8,12 @@ class Page {
     }
 
     make() {
-        this.body = frappe.ui.add('div', 'page hide', frappe.desk.main);
+        this.wrapper = frappe.ui.add('div', 'page hide', frappe.desk.main);
+        this.body = frappe.ui.add('div', 'page-body', this.wrapper);
     }
 
     hide() {
-        frappe.ui.add_class(this.body, 'hide');
-
+        this.wrapper.classList.add('hide');
         this.trigger('hide');
     }
 
@@ -21,25 +21,38 @@ class Page {
         if (frappe.router.current_page) {
             frappe.router.current_page.hide();
         }
-        frappe.ui.remove_class(this.body, 'hide');
+        this.wrapper.classList.remove('hide');
+        this.body.classList.remove('hide');
+
+        if (this.page_error) {
+            this.page_error.classList.add('hide');
+        }
+
         frappe.router.current_page = this;
         document.title = this.title;
 
         this.trigger('show', params);
     }
 
+    render_error(status_code, message) {
+        if (!this.page_error) {
+            this.page_error = frappe.ui.add('div', 'page-error', this.wrapper);
+        }
+        this.body.classList.add('hide');
+        this.page_error.classList.remove('hide');
+        this.page_error.innerHTML = `<h3 class="text-extra-muted">${status_code}</h3><p class="text-muted">${message}</p>`;
+    }
+
     on(event, fn) {
-        if (!this.handlers[event]) this.handlers.event = [];
+        if (!this.handlers[event]) this.handlers[event] = [];
         this.handlers[event].push(fn);
     }
 
-    trigger(event, params) {
+    async trigger(event, params) {
         if (this.handlers[event]) {
             for (let handler of this.handlers[event]) {
-                handler(params);
+                await handler(params);
             }
         }
     }
 }
-
-module.exports = { Page: Page };

common/errors.js

@@ -0,0 +1,21 @@
+class BaseError extends Error {
+	constructor(status_code, ...params) {
+		super(...params);
+		this.status_code = status_code;
+	}
+}
+
+class ValidationError extends BaseError {
+	constructor(...params) { super(417, ...params); }
+}
+
+module.exports = {
+	ValidationError: ValidationError,
+	ValueError: class ValueError extends ValidationError { },
+	NotFound: class NotFound extends BaseError {
+		constructor(...params) { super(404, ...params); }
+	},
+	Forbidden: class Forbidden extends BaseError {
+		constructor(...params) { super(403, ...params); }
+	},
+}

common/index.js

@@ -4,6 +4,7 @@ const model = require('../model');
 const _document = require('../model/document');
 const meta = require('../model/meta');
 const _session = require('../session');
+const errors = require('./errors');
 
 
 module.exports = {
@@ -14,5 +15,6 @@ module.exports = {
         frappe.document = _document;
         frappe.meta = meta;
         frappe._session = _session;
+        frappe.errors = errors;
     }
 }

common/router.js

@@ -0,0 +1,99 @@
+const frappe = require('frappe-core');
+
+module.exports = class Router {
+    constructor() {
+        this.current_page = null;
+        this.static_routes = [];
+        this.dynamic_routes = [];
+    }
+
+    add(route, handler) {
+        let page = {handler: handler, route: route};
+
+        // '/todo/:name/:place'.match(/:([^/]+)/g);
+        page.param_keys = route.match(/:([^/]+)/g);
+
+        if (page.param_keys) {
+            // make expression
+            // '/todo/:name/:place'.replace(/\/:([a-z1-9]+)/g, "\/([a-z0-9]+)");
+            page.expression = route.replace(/\/:([a-z1-9]+)/g, "\/([a-z0-9]+)");
+            this.dynamic_routes.push(page);
+            this.sort_dynamic_routes();
+        } else {
+            this.static_routes.push(page);
+            this.sort_static_routes();
+        }
+    }
+
+    sort_dynamic_routes() {
+        // routes with fewer parameters first
+        this.dynamic_routes = this.dynamic_routes.sort((a, b) => {
+            if (a.param_keys.length > b.param_keys.length) {
+                return 1;
+            } else if (a.param_keys.length < b.param_keys.length) {
+                return -1;
+            } else {
+                return a.route.length > b.route.length ? 1 : -1;
+            }
+        })
+    }
+
+    sort_static_routes() {
+        // longer routes on first
+        this.static_routes = this.static_routes.sort((a, b) => {
+            return a.route.length > b.route.length ? 1 : -1;
+        });
+    }
+
+    listen() {
+        window.addEventListener('hashchange', (event) => {
+            this.show(window.location.hash);
+        });
+    }
+
+    set_route(...parts) {
+        const route = parts.join('/');
+        window.location.hash = route;
+    }
+
+    async show(route) {
+        if (route && route[0]==='#') {
+            route = route.substr(1);
+        }
+
+        if (!route) {
+            route = this.default;
+        }
+        let page = this.match(route);
+
+        if (page) {
+            if (typeof page.handler==='function') {
+                await page.handler(page.params);
+            } else {
+                await page.handler.show(page.params);
+            }
+        }
+    }
+
+    match(route) {
+        // match static
+        for(let page of this.static_routes) {
+            if (page.route === route) {
+                return {handler: page.handler};
+            }
+        }
+
+        // match dynamic
+        for(let page of this.dynamic_routes) {
+            let matches = route.match(new RegExp(page.expression));
+
+            if (matches && matches.length == page.param_keys.length + 1) {
+                let params = {}
+                for (let i=0; i < page.param_keys.length; i++) {
+                    params[page.param_keys[i].substr(1)] = matches[i + 1];
+                }
+                return {handler:page.handler, params: params};
+            }
+        }
+    }
+}

docs/client/desk.md

@@ -0,0 +1,27 @@
+# Desk
+
+Desk includes the default routing and menu system for the single page application
+
+## Menus
+
+You can add a new menu to the desk via
+
+```js
+frappe.desk.add_sidebar_item('New ToDo', '#new/todo');
+```
+
+## Views
+
+Default route handling for various views
+
+### List Documents
+
+All list views are rendered at `/list/:doctype`
+
+### Edit Documents
+
+Documents can be edited via `/edit/:doctype/:name`
+
+### New Documents
+
+New Documents can be created via `/new/:doctype`

docs/errors.md

@@ -0,0 +1,16 @@
+# Errors
+
+Frappe.js comes with standard error classes that have an HTTP status code attached.
+
+For example you can raise a "not found" (HTTP Status Code 404) via:
+
+```js
+throw new frappe.errors.NotFound('Document Not Found');
+```
+
+### Standard Errors
+
+- 403: Forbidden
+- 404: NotFound
+- 417: ValidationError
+- 417: ValueError

index.js

@@ -2,7 +2,6 @@ module.exports = {
     async init() {
         if (this._initialized) return;
         this.init_config();
-        this.init_errors();
         this.init_globals();
         this._initialized = true;
     },
@@ -14,12 +13,30 @@ module.exports = {
         };
     },
 
-    init_errors() {
-        this.ValueError = class extends Error { };
-    },
-
     init_globals() {
         this.meta_cache = {};
+        this.docs = {};
+        this.flags = {
+            cache_docs: false
+        }
+    },
+
+    add_to_cache(doc) {
+        if (!this.flags.cache_docs) return;
+
+        // add to `docs` cache
+        if (doc.doctype && doc.name) {
+            if (!this.docs[doc.doctype]) {
+                this.docs[doc.doctype] = {};
+            }
+            this.docs[doc.doctype][doc.name] = doc;
+        }
+    },
+
+    get_doc_from_cache(doctype, name) {
+        if (this.docs[doctype] && this.docs[doctype][name]) {
+            return this.docs[doctype][name];
+        }
     },
 
     get_meta(doctype) {
@@ -37,9 +54,14 @@ module.exports = {
 
     async get_doc(data, name) {
         if (typeof data==='string' && typeof name==='string') {
+            let doc = this.get_doc_from_cache(data, name);
+            if (!doc) {
                 let controller_class = this.models.get_controller(data);
-            var doc = new controller_class({doctype:data, name: name});
+                doc = new controller_class({doctype:data, name: name});
                 await doc.load();
+                this.add_to_cache(doc);
+            }
+            return doc;
         } else {
             let controller_class = this.models.get_controller(data.doctype);
             var doc = new controller_class(data);
@@ -47,6 +69,14 @@ module.exports = {
         return doc;
     },
 
+    async get_new_doc(doctype) {
+        let doc = await frappe.get_doc({doctype: doctype});
+        doc.set_name();
+        doc.__not_inserted = true;
+        this.add_to_cache(doc);
+        return doc;
+    },
+
     async insert(data) {
         const doc = await this.get_doc(data);
         return await doc.insert();

model/document.js

@@ -98,7 +98,12 @@ class Document {
     }
 
     async load() {
-        Object.assign(this, await frappe.db.get(this.doctype, this.name));
+        let data = await frappe.db.get(this.doctype, this.name);
+        if (data.name) {
+            Object.assign(this, data);
+        } else {
+            throw new frappe.errors.NotFound(`Not Found: ${this.doctype} ${this.name}`);
+        }
     }
 
     async insert() {

model/meta.js

@@ -77,7 +77,7 @@ class Meta extends Document {
             options = df.options.split('\n');
         }
         if (!options.includes(value)) {
-            throw new frappe.ValueError(`${value} must be one of ${options.join(", ")}`);
+            throw new frappe.errors.ValueError(`${value} must be one of ${options.join(", ")}`);
         }
     }
 

models/doctype/todo/todo.js

@@ -4,11 +4,12 @@ class todo_meta extends frappe.meta.Meta {
     setup_meta() {
         Object.assign(this, require('./todo.json'));
         this.name = 'ToDo';
-        this.list_options.fields = ['name', 'subject', 'status', 'description'];
+        this.list_options.fields = ['name', 'subject', 'status'];
     }
 
     get_row_html(data) {
-        return `<a href="#edit/todo/${data.name}">${data.subject}</a>`;
+        const sign = data.status === 'Open' ? '' : '✔';
+        return `<p><a href="#edit/todo/${data.name}">${sign} ${data.subject}</a></p>`;
     }
 
 }

server/index.js

@@ -36,10 +36,6 @@ module.exports = {
         app.use(bodyParser.urlencoded({ extended: true }));
         app.use(express.static('./'));
 
-        app.use(function (err, req, res, next) {
-            console.error(err.stack);
-            res.status(500).send('Something broke!');
-        })
         // routes
         rest_api.setup(app);
 

tests/test_document.js

@@ -48,7 +48,7 @@ describe('Document', () => {
             () => {
                 doc.set('status', 'Illegal');
             },
-            frappe.ValueError
+            frappe.errors.ValueError
         );
     });
 

tests/test_rest_api.js

@@ -4,7 +4,7 @@ const fetch = require('node-fetch');
 const helpers = require('./helpers');
 const { spawn } = require('child_process');
 const process = require('process');
-const Database = require('frappe-core/backends/rest_client').Database
+const RESTClient = require('frappe-core/backends/rest_client')
 
 // create a copy of frappe
 
@@ -19,7 +19,7 @@ describe('REST', () => {
         await frappe.init();
         await frappe.login();
 
-        frappe.db = await new Database({server: 'localhost:8000'});
+        frappe.db = await new RESTClient({server: 'localhost:8000'});
         frappe.fetch = fetch;
 
         // wait for server to start

tests/test_router.js

@@ -0,0 +1,28 @@
+const Router = require('frappe-core/common/router');
+const assert = require('assert');
+
+describe('Router', () => {
+	it('router should sort static routes', () => {
+		let router = new Router();
+		router.add('/a', 'x');
+		router.add('/a/b', 'y');
+		router.add('/a/b/clong/', 'z');
+
+		assert.equal(router.match('/a/b').handler, 'y');
+		assert.equal(router.match('/a').handler, 'x');
+		assert.equal(router.match('/a/b/clong/').handler, 'z');
+	});
+
+	it('router should sort dynamic routes', () => {
+		let router = new Router();
+		router.add('/edit/todo/mytest', 'static');
+		router.add('/edit/:doctype/:name', 'all');
+		router.add('/edit/todo/:name', 'todo');
+
+		assert.equal(router.match('/edit/todo/test').handler, 'todo');
+		assert.equal(router.match('/edit/user/test').handler, 'all');
+		assert.equal(router.match('/edit/todo/mytest').handler, 'static');
+	});
+
+
+});

utils/index.js

@@ -5,7 +5,10 @@ module.exports = {
 
     async_handler(fn) {
         return (req, res, next) => Promise.resolve(fn(req, res, next))
-            .catch(next);
+            .catch((err) => {
+                // handle error
+                res.status(err.status_code).send({ error: err.message });
+            });
     },
 
     async sleep(seconds) {