From 10bf787e3a271ccfb2f1ae7923f4553bf03bab1d Mon Sep 17 00:00:00 2001
From: Mosher <moseternal@gmail.com>
Date: Wed, 12 Oct 2022 11:40:14 +0800
Subject: [PATCH] =?UTF-8?q?add=EF=BC=9A=E6=96=B0=E5=A2=9Ehandlebars?=
 =?UTF-8?q?=E5=8A=A9=E6=89=8B=E7=B1=BBconcat?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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拼接字符串
---
 .../handlebars/src/helpers/concat/concat.ts   | 26 +++++++++++++++++++
 packages/handlebars/src/helpers/index.ts      |  2 ++
 .../handlebars/src/utils/helper/helper.ts     |  1 +
 .../handlebars/test/helpers/helper.test.ts    |  8 ++++++
 4 files changed, 37 insertions(+)
 create mode 100644 packages/handlebars/src/helpers/concat/concat.ts

diff --git a/packages/handlebars/src/helpers/concat/concat.ts b/packages/handlebars/src/helpers/concat/concat.ts
new file mode 100644
index 0000000..6678fec
--- /dev/null
+++ b/packages/handlebars/src/helpers/concat/concat.ts
@@ -0,0 +1,26 @@
+import { HelperBase } from '../helper-base';
+
+/**
+ * 字符串拼接
+ *
+ * @description 用法：{{concat string1 string2 string3}} 返回值为 string 类型
+ * @author mosher
+ * @date 2022-10-12 10:59:10
+ * @export
+ * @class HelperConcat
+ * @extends {HelperBase}
+ */
+export class HelperConcat extends HelperBase {
+  constructor() {
+    super('concat');
+  }
+
+  onExecute(...args: string[]): string {
+    args.pop();
+    let result: string = '';
+    args.forEach((s: string) => {
+      result += s;
+    });
+    return result;
+  }
+}
diff --git a/packages/handlebars/src/helpers/index.ts b/packages/handlebars/src/helpers/index.ts
index 31a1ba0..3c59d25 100644
--- a/packages/handlebars/src/helpers/index.ts
+++ b/packages/handlebars/src/helpers/index.ts
@@ -1,5 +1,6 @@
 import { HelperAnd } from './and/and';
 import { HelperCamelCase } from './camel-case/camel-case';
+import { HelperConcat } from './concat/concat';
 import { HelperEq } from './eq/eq';
 import { HelperGt } from './gt/gt';
 import { HelperGte } from './gte/gte';
@@ -26,6 +27,7 @@ import { HelperUpperCase } from './upper-case/upper-case';
 export function installHelpers(): void {
   new HelperAnd();
   new HelperCamelCase();
+  new HelperConcat();
   new HelperEq();
   new HelperGt();
   new HelperGte();
diff --git a/packages/handlebars/src/utils/helper/helper.ts b/packages/handlebars/src/utils/helper/helper.ts
index e1a159c..2c26fc6 100644
--- a/packages/handlebars/src/utils/helper/helper.ts
+++ b/packages/handlebars/src/utils/helper/helper.ts
@@ -20,6 +20,7 @@ export class HelperUtil {
     'log',
     'and',
     'camelCase',
+    'concat',
     'eq',
     'gt',
     'get',
diff --git a/packages/handlebars/test/helpers/helper.test.ts b/packages/handlebars/test/helpers/helper.test.ts
index 097cc26..7660d15 100644
--- a/packages/handlebars/test/helpers/helper.test.ts
+++ b/packages/handlebars/test/helpers/helper.test.ts
@@ -36,6 +36,14 @@ describe('模板助手测试', () => {
     expect(str).toBe('globalModel');
   });
 
+  it('字符串拼接: concat', () => {
+    {
+      const template = `{{concat "string1" "string2"}}`;
+      const str = engine.render(template, {});
+      expect(str).toBe('string1string2');
+    }
+  });
+
   it('等于: eq', () => {
     {
       const template = `{{#eq name '张三'}}真的{{else}}假的{{/eq}}`;
-- 
Gitee