From 77412cb6d1d2336e9330606635fe6cc66dce2919 Mon Sep 17 00:00:00 2001
From: "suguo.yao" <ysg@myschools.me>
Date: Thu, 14 Jul 2022 10:53:58 +0800
Subject: [PATCH] metamask sign

---
 src/App.vue                   |   2 +-
 src/components/HelloWorld.vue | 138 ----------------------------------
 src/components/metamask.vue   |  14 ++++
 src/router/index.js           |   6 +-
 src/views/AboutView.vue       |  23 ------
 src/views/HomeView.vue        |   2 +-
 src/views/LoginView.vue       |  63 ++++++++++++++++
 7 files changed, 82 insertions(+), 166 deletions(-)
 delete mode 100644 src/components/HelloWorld.vue
 create mode 100644 src/components/metamask.vue
 delete mode 100644 src/views/AboutView.vue
 create mode 100644 src/views/LoginView.vue

diff --git a/src/App.vue b/src/App.vue
index e0d60f4..def9faa 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,7 +1,7 @@
 <template>
   <nav>
     <router-link to="/">Home</router-link> |
-    <router-link to="/about">About</router-link>
+    <router-link to="/login">Login</router-link>
   </nav>
   <router-view />
 </template>
diff --git a/src/components/HelloWorld.vue b/src/components/HelloWorld.vue
deleted file mode 100644
index 885875d..0000000
--- a/src/components/HelloWorld.vue
+++ /dev/null
@@ -1,138 +0,0 @@
-<template>
-  <div class="hello">
-    <h1>{{ msg }}</h1>
-    <p>
-      For a guide and recipes on how to configure / customize this project,<br />
-      check out the
-      <a href="https://cli.vuejs.org" target="_blank" rel="noopener"
-        >vue-cli documentation</a
-      >.
-    </p>
-    <h3>Installed CLI Plugins</h3>
-    <ul>
-      <li>
-        <a
-          href="https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-babel"
-          target="_blank"
-          rel="noopener"
-          >babel</a
-        >
-      </li>
-      <li>
-        <a
-          href="https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-pwa"
-          target="_blank"
-          rel="noopener"
-          >pwa</a
-        >
-      </li>
-      <li>
-        <a
-          href="https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-router"
-          target="_blank"
-          rel="noopener"
-          >router</a
-        >
-      </li>
-      <li>
-        <a
-          href="https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-vuex"
-          target="_blank"
-          rel="noopener"
-          >vuex</a
-        >
-      </li>
-      <li>
-        <a
-          href="https://github.com/vuejs/vue-cli/tree/dev/packages/%40vue/cli-plugin-eslint"
-          target="_blank"
-          rel="noopener"
-          >eslint</a
-        >
-      </li>
-    </ul>
-    <h3>Essential Links</h3>
-    <ul>
-      <li>
-        <a href="https://vuejs.org" target="_blank" rel="noopener">Core Docs</a>
-      </li>
-      <li>
-        <a href="https://forum.vuejs.org" target="_blank" rel="noopener"
-          >Forum</a
-        >
-      </li>
-      <li>
-        <a href="https://chat.vuejs.org" target="_blank" rel="noopener"
-          >Community Chat</a
-        >
-      </li>
-      <li>
-        <a href="https://twitter.com/vuejs" target="_blank" rel="noopener"
-          >Twitter</a
-        >
-      </li>
-      <li>
-        <a href="https://news.vuejs.org" target="_blank" rel="noopener">News</a>
-      </li>
-    </ul>
-    <h3>Ecosystem</h3>
-    <ul>
-      <li>
-        <a href="https://router.vuejs.org" target="_blank" rel="noopener"
-          >vue-router</a
-        >
-      </li>
-      <li>
-        <a href="https://vuex.vuejs.org" target="_blank" rel="noopener">vuex</a>
-      </li>
-      <li>
-        <a
-          href="https://github.com/vuejs/vue-devtools#vue-devtools"
-          target="_blank"
-          rel="noopener"
-          >vue-devtools</a
-        >
-      </li>
-      <li>
-        <a href="https://vue-loader.vuejs.org" target="_blank" rel="noopener"
-          >vue-loader</a
-        >
-      </li>
-      <li>
-        <a
-          href="https://github.com/vuejs/awesome-vue"
-          target="_blank"
-          rel="noopener"
-          >awesome-vue</a
-        >
-      </li>
-    </ul>
-  </div>
-</template>
-
-<script>
-export default {
-  name: "HelloWorld",
-  props: {
-    msg: String,
-  },
-};
-</script>
-
-<!-- Add "scoped" attribute to limit CSS to this component only -->
-<style scoped>
-h3 {
-  margin: 40px 0 0;
-}
-ul {
-  list-style-type: none;
-  padding: 0;
-}
-li {
-  display: inline-block;
-  margin: 0 10px;
-}
-a {
-  color: #42b983;
-}
-</style>
diff --git a/src/components/metamask.vue b/src/components/metamask.vue
new file mode 100644
index 0000000..46c7954
--- /dev/null
+++ b/src/components/metamask.vue
@@ -0,0 +1,14 @@
+<template>
+  <div class="hello">
+    <h1>{{ msg }}</h1>
+  </div>
+</template>
+
+<script>
+export default {
+  name: "HelloWorld",
+  props: {
+    msg: String,
+  },
+};
+</script>
diff --git a/src/router/index.js b/src/router/index.js
index 9dbb864..bc8d4d1 100644
--- a/src/router/index.js
+++ b/src/router/index.js
@@ -7,9 +7,9 @@ const routes = [
     component: () => import("../views/HomeView.vue"),
   },
   {
-    path: "/about",
-    name: "about",
-    component: () => import("../views/AboutView.vue"),
+    path: "/login",
+    name: "login",
+    component: () => import("../views/LoginView.vue"),
   },
 ];
 
diff --git a/src/views/AboutView.vue b/src/views/AboutView.vue
deleted file mode 100644
index 745583f..0000000
--- a/src/views/AboutView.vue
+++ /dev/null
@@ -1,23 +0,0 @@
-<template>
-  <div class="about">
-    <h1>This is an about page</h1>
-    <HelloWorld :msg="message" />
-  </div>
-</template>
-
-<script>
-// @ is an alias to /src
-import HelloWorld from "@/components/HelloWorld.vue";
-
-export default {
-  name: "AboutView",
-  data() {
-    return {
-      message: "about app",
-    };
-  },
-  components: {
-    HelloWorld,
-  },
-};
-</script>
diff --git a/src/views/HomeView.vue b/src/views/HomeView.vue
index 318e397..a8e5297 100644
--- a/src/views/HomeView.vue
+++ b/src/views/HomeView.vue
@@ -7,7 +7,7 @@
 
 <script>
 // @ is an alias to /src
-import HelloWorld from "@/components/HelloWorld.vue";
+import HelloWorld from "@/components/metamask.vue";
 
 export default {
   name: "HomeView",
diff --git a/src/views/LoginView.vue b/src/views/LoginView.vue
new file mode 100644
index 0000000..0c92de9
--- /dev/null
+++ b/src/views/LoginView.vue
@@ -0,0 +1,63 @@
+<template>
+  <div class="about">
+    <h1>sign in with MetaMask</h1>
+    <h3 v-text="wallet"></h3>
+    <button @click="toggleButton">{{ btnName }}</button>
+  </div>
+</template>
+
+<script>
+export default {
+  name: "LoginView",
+  data() {
+    return {
+      wallet: "-",
+      btnName: "Sign in with MetaMask",
+    };
+  },
+  methods: {
+    toggleButton() {
+      if (this.$data.btnName == "MetaMask is not installed") {
+        return;
+      }
+      if (this.$data.btnName == "Sign in with MetaMask") {
+        this.signinWithMetaMask();
+      }
+      if (this.$data.btnName == "Sign out of MetaMask") {
+        this.signOutOfMetaMask();
+      }
+    },
+    async signinWithMetaMask() {
+      const accounts = await window.ethereum
+        .request({ method: "eth_requestAccounts" })
+        .catch((e) => {
+          console.error(e.message);
+          //debugger //代码运行至此暂停
+          return;
+        });
+
+      if (!accounts) {
+        return;
+      }
+
+      //正常登录，赋钱包地址
+      this.$data.wallet = accounts[0];
+      this.$data.btnName = "Sign out of MetaMask";
+    },
+    signOutOfMetaMask() {
+      this.$data.wallet = "-";
+      this.$data.btnName = "Sign in with MetaMask";
+    },
+  },
+  created() {
+    //测试metamask是否安装，仅测试使用
+    if (typeof window.ethereum !== "undefined") {
+      console.log("MetaMask is installed!");
+    }
+    //没有安装metamask时按钮不启用
+    if (!window.ethereum) {
+      this.$data.btnName = "MetaMask is not installed";
+    }
+  },
+};
+</script>