From 0670d29457bee245bd86f3233e54c328e5ec9320 Mon Sep 17 00:00:00 2001
From: Vasili Karaev <kratos661@gmail.com>
Date: Thu, 5 Aug 2021 18:27:50 +0300
Subject: [PATCH] Add routing

---
 package.json       |  4 ++
 routing/Route.ts   | 15 ++++++++
 routing/Router.tsx | 94 ++++++++++++++++++++++++++++++++++++++++++++++
 routing/config.ts  | 33 ++++++++++++++++
 4 files changed, 146 insertions(+)
 create mode 100644 routing/Route.ts
 create mode 100644 routing/Router.tsx
 create mode 100644 routing/config.ts

diff --git a/package.json b/package.json
index 1078c84..acca6fe 100644
--- a/package.json
+++ b/package.json
@@ -3,12 +3,16 @@
   "version": "0.1.0",
   "dependencies": {
     "@types/qs": "^6.9.7",
+    "@types/react": "^17.0.15",
+    "@types/react-router-dom": "^5.1.8",
     "@types/sprintf-js": "^1.1.2",
     "axios": "^0.21.1",
     "loglevel": "^1.7.1",
     "modern-css-reset": "^1.4.0",
     "qs": "^6.10.1",
     "ramda": "^0.27.1",
+    "react": "^17.0.2",
+    "react-router-dom": "^5.2.0",
     "sass-rem": "^3.0.0",
     "sprintf-js": "^1.1.2"
   }
diff --git a/routing/Route.ts b/routing/Route.ts
new file mode 100644
index 0000000..9a1bdee
--- /dev/null
+++ b/routing/Route.ts
@@ -0,0 +1,15 @@
+import React from 'react'
+
+interface Route {
+  path: string
+  name?: string
+  redirect?: string
+  exact?: boolean
+  navbar?: boolean
+  isIndex?: boolean
+  icon?: React.ComponentType
+  childRoutes?: Route[]
+  component?: React.ComponentType
+}
+
+export default Route
diff --git a/routing/Router.tsx b/routing/Router.tsx
new file mode 100644
index 0000000..ca85189
--- /dev/null
+++ b/routing/Router.tsx
@@ -0,0 +1,94 @@
+import React from 'react'
+import { BrowserRouter, Redirect, Route, Switch } from 'react-router-dom'
+import { prepareRoutes } from './config'
+import RouteDefinition from './Route'
+
+const getComponentRoute = (contextPath: string, component: React.ComponentType) => (
+  <Route
+    exact
+    key={contextPath}
+    component={component}
+    path={contextPath}
+  />
+)
+
+const renderRouteConfig = (
+  Container: React.ComponentType,
+  routes: RouteDefinition[],
+  contextPath: string,
+): JSX.Element => {
+  // Resolve route config object in React Router v3.
+  const children: React.ReactNode[] = []
+
+  const renderRoute = (item: RouteDefinition, routeContextPath: string) => {
+    let newContextPath: string
+
+    if (/(^\/)|(^\*)/.test(item.path)) {
+      newContextPath = item.path
+    } else {
+      newContextPath = `${routeContextPath}/${item.path}`
+    }
+
+    newContextPath = newContextPath.replace(/\/+/g, '/')
+
+    if (item.redirect) {
+      const route = (
+        <Route
+          exact
+          key={newContextPath}
+          render={() => <Redirect to={item.redirect as string} />}
+          path={newContextPath}
+        />
+      )
+
+      children.push(route)
+    } else if (item.component && item.childRoutes) {
+      const routeConfig = renderRouteConfig(item.component, item.childRoutes, newContextPath)
+
+      children.push(routeConfig)
+    } else if (item.component) {
+      const route = getComponentRoute(newContextPath, item.component)
+
+      children.push(route)
+    } else if (item.childRoutes) {
+      item.childRoutes.forEach(r => renderRoute(r, newContextPath))
+    }
+  }
+
+  routes.forEach(item => renderRoute(item, contextPath))
+
+  // Use Switch as the default container by default
+  if (!Container) {
+    return (
+      <Switch>
+        {children as JSX.TChildren[]}
+      </Switch>
+    )
+  }
+
+  return (
+    <BrowserRouter>
+      <Container key={contextPath}>
+        <Switch>
+          {children as JSX.TChildren[]}
+        </Switch>
+      </Container>
+    </BrowserRouter>
+  )
+}
+
+interface Props {
+  routeConfig: RouteDefinition[]
+  component: React.ComponentType
+  baseUrlPath: string
+}
+
+const Router: React.FC<Props> = (props: Props) => {
+  const { routeConfig, component, baseUrlPath } = props
+
+  const preparedRoutes = prepareRoutes(routeConfig)
+
+  return renderRouteConfig(component, preparedRoutes, baseUrlPath)
+}
+
+export default Router
diff --git a/routing/config.ts b/routing/config.ts
new file mode 100644
index 0000000..434be7c
--- /dev/null
+++ b/routing/config.ts
@@ -0,0 +1,33 @@
+import * as R from 'ramda'
+import Route from './Route'
+
+// Handle isIndex property of route config:
+// Duplicate it and put it as the first route rule.
+const handleIndexRoute = (route: Route) => {
+  if (!route.childRoutes || !route.childRoutes.length) {
+    return
+  }
+
+  const indexRoute = route.childRoutes.find(R.prop('isIndex'))
+
+  if (indexRoute) {
+    const first = {
+      ...indexRoute,
+      path: route.path,
+      exact: true,
+    }
+
+    route.childRoutes.unshift(first)
+  }
+
+  route.childRoutes.forEach(handleIndexRoute)
+}
+
+export const prepareRoutes: (route: Route[]) => Route[] = R.pipe(
+  R.filter((r: Route): boolean => Boolean(
+    r.redirect
+      || r.component
+      || (r.childRoutes && r.childRoutes.length > 0),
+  )),
+  R.forEach(handleIndexRoute),
+)