Merge pull request #14 from hopeness/patch-1

Support koa2

lib/koa2.js

@@ -0,0 +1,62 @@
+/**
+ * xtpl adapter for koa
+ * @author yiminghe@gmail.com
+ */
+var xtpl = require('./xtpl');
+var Path = require('path');
+
+function xtplRender(path, data, option) {
+    return function (done) {
+        xtpl.render(path, data, option, done);
+    };
+}
+
+/**
+ * merge source to target
+ *
+ * @param {Object} target
+ * @param {Object} source
+ * @return {Object}
+ * @api private
+ */
+function merge(target, source) {
+  for (var key in source) {
+    target[key] = source[key];
+  }
+}
+
+
+// option.views
+// option.extname
+// option.
+module.exports = (app, option) => {
+    option = option || {};
+    var views = option.views;
+    var extname = option.extname || 'xtpl';
+
+    var render = (path, data, opt) => {
+
+        var context = {};
+
+        // merge koa ctx.state, notice: koa < 0.14.0 have no ctx.state
+        merge(context, this.state || {});
+        merge(context, data);
+
+        var filePath;
+
+        if(path.charAt(0) === '/') {
+            filePath = path;
+        } else {
+            filePath = Path.resolve(views, path + '.' + extname);
+        }
+
+        let content = '';
+        xtplRender(filePath, context, option)((e, data) => {
+            content = data;
+        });
+        return content;
+    }
+
+    app.context.render = render;
+    return app;
+};