From 816dc8f1cc483d356b826b9b7539ebfe5779697f Mon Sep 17 00:00:00 2001
From: hubcarl <hubcarl@126.com>
Date: Wed, 12 Dec 2018 20:52:21 +0800
Subject: [PATCH] feat: support asset

---
 app/extend/context.js | 17 +++++++++++++----
 lib/engine.js         | 23 +++++++++++++++++++++++
 package.json          |  1 +
 3 files changed, 37 insertions(+), 4 deletions(-)

diff --git a/app/extend/context.js b/app/extend/context.js
index 49798dd..3ed25ef 100644
--- a/app/extend/context.js
+++ b/app/extend/context.js
@@ -1,12 +1,21 @@
 'use strict';
 module.exports = {
   renderClient(name, locals, options) {
-    return this.renderVueClient(name, locals, options);
+    return this.renderVueClient(name, locals, options).then(html => {
+      this.body = html;
+    });
   },
-  renderVueClient(name, locals, options = {}) {
-    locals = this.app.vue.normalizeLocals(this, locals, options, false);
-    return this.app.vue.renderClient(name, locals, options).then(html => {
+  renderAsset(name, locals, options) {
+    return this.renderVueAsset(name, locals, options).then(html => {
       this.body = html;
     });
   },
+  renderVueAsset(name, locals, options) {
+    return this.app.vue.renderAsset(this, name, locals, options);
+  },
+  renderVueClient(name, locals, options = {}) {
+    locals = this.app.vue.normalizeLocals(this, locals, options, false);
+    return this.app.vue.renderClient(name, locals, options);
+  },
 };
+
diff --git a/lib/engine.js b/lib/engine.js
index 659ed82..534a55a 100644
--- a/lib/engine.js
+++ b/lib/engine.js
@@ -2,6 +2,7 @@
 const fs = require('fs');
 const Vue = require('vue');
 const LRU = require('lru-cache');
+const serialize = require('serialize-javascript');
 const vueServerRenderer = require('vue-server-renderer');
 const Resource = require('server-side-render-resource');
 const VUE_RESOURCE = Symbol('Application#VueResource');
@@ -56,6 +57,17 @@ class Engine {
     return options.renderOptions && options.renderOptions.template || this.template;
   }
 
+  getAsset(name, state) {
+    const manifest = this.resource && this.resource.manifest || {};
+    const deps = manifest.deps || {};
+    const res = deps[name] || {};
+    return {
+      js: res.js || [],
+      css: res.css || [],
+      state: serialize(state || {}, { isJSON: true })
+    };
+  }
+
   normalizeLocals(ctx, locals = {}, options = {}, engine = true) {
     // egg-view engine mode, the locals had merged
     if (engine) {
@@ -142,6 +154,17 @@ class Engine {
       return this.resource ? this.resource.inject(html, name, locals, options) : html;
     });
   }
+
+  renderAsset(ctx, name, locals, options = {}) {
+    const viewEngine = options.viewEngine || this.config.viewEngine || 'nunjucks';
+    // 输出到页面的 state 数据
+    const state = Object.assign({}, ctx.locals, locals);
+    const asset = this.getAsset(name, state);
+    const template = this.getTemplate(options);
+    const context = Object.assign({}, locals, { asset });
+    // egg-view 自动合并 ctx, request, response, helper
+    return ctx.renderString(template, context, { viewEngine });
+  }
 }
 
 module.exports = Engine;
diff --git a/package.json b/package.json
index bf09a1a..b08c2f8 100644
--- a/package.json
+++ b/package.json
@@ -14,6 +14,7 @@
   ],
   "dependencies": {
     "lru-cache": "^4.0.1",
+    "serialize-javascript": "^1.5.0",
     "server-side-render-resource": "^1.0.3",
     "vue-server-renderer": "^2.5.13"
   },