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May 25, 2021 10:25 am GMT

Simple Chat with Translator by AWS Amplify

AWS Amplify has many functions related to other AWS services.
This article uses "Predictions," which is the category of "AI/ML."
Among them, let's use "Translate language."
https://docs.amplify.aws/lib/predictions/translate/q/platform/js

1. Setup

Install above items.

2. Create Project

Let's create a Vue project.

$ vue create sample-amplify-translator-chatVue CLI v4.5.13? Please pick a preset: Manually select features? Check the features needed for your project: Choose Vue version, Babel, Router, Vuex, Linter? Choose a version of Vue.js that you want to start the project with 2.x? Use history mode for router? (Requires proper server setup for index fallback in production) Yes? Pick a linter / formatter config: Prettier? Pick additional lint features: Lint on save? Where do you prefer placing config for Babel, ESLint, etc.? In dedicated config files? Save this as a preset for future projects? No(snip)$ cd sample-amplify-translator-chat$ vue add vuetify(snip)? Choose a preset: Default (recommended)(snip)$

And set Amplify project.

$ amplify initNote: It is recommended to run this command from the root of your app directory? Enter a name for the project sampleamplifytranslaThe following configuration will be applied:Project information| Name: sampleamplifytransla| Environment: dev| Default editor: Visual Studio Code| App type: javascript| Javascript framework: vue| Source Directory Path: src| Distribution Directory Path: dist| Build Command: npm run-script build| Start Command: npm run-script serve? Initialize the project with the above configuration? No? Enter a name for the environment dev? Choose your default editor: Visual Studio Code? Choose the type of app that you're building javascriptPlease tell us about your project? What javascript framework are you using vue? Source Directory Path:  src? Distribution Directory Path: dist? Build Command:  yarn build? Start Command: yarn serveUsing default provider  awscloudformation? Select the authentication method you want to use: AWS profileFor more information on AWS Profiles, see:https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-profiles.html? Please choose the profile you want to use defaultAdding backend environment dev to AWS Amplify Console app: XXXXXXXXXXXXXX Initializing project in the cloud...(snip)Your project has been successfully initialized and connected to the cloud!Some next steps:"amplify status" will show you what you've added already and if it's locally configured or deployed"amplify add <category>" will allow you to add features like user login or a backend API"amplify push" will build all your local backend resources and provision it in the cloud"amplify console" to open the Amplify Console and view your project status"amplify publish" will build all your local backend and frontend resources (if you have hosting category added) and provision it in the cloudPro tip:Try "amplify add api" to create a backend API and then "amplify publish" to deploy everything$

3. Add Auth

"Translate language" function has to need Auth.
So, add Auth function.

$ amplify add authUsing service: Cognito, provided by: awscloudformation The current configured provider is Amazon Cognito.  Do you want to use the default authentication and security configuration? Default configuration Warning: you will not be able to edit these selections.  How do you want users to be able to sign in? Username Do you want to configure advanced settings? No, I am done.Successfully added auth resource sampleamplifytransla4290ed5c locallySome next steps:"amplify push" will build all your local backend resources and provision it in the cloud"amplify publish" will build all your local backend and frontend resources (if you have hosting category added) and provision it in the cloud$

Then push the project.

$ amplify push Successfully pulled backend environment dev from the cloud.Current Environment: dev| Category | Resource name                | Operation | Provider plugin   || -------- | ---------------------------- | --------- | ----------------- || Auth     | sampleamplifytransla4290ed5c | Create    | awscloudformation |? Are you sure you want to continue? Yes Updating resources in the cloud. This may take a few minutes...(snip)UPDATE_COMPLETE_CLEANUP_IN_PROGRESS amplify-sampleamplifytransla-dev-221649 AWS::CloudFormation::Stack Mon May 24 2021 22:42:33 GMT+0900 () UPDATE_COMPLETE                     amplify-sampleamplifytransla-dev-221649 AWS::CloudFormation::Stack Mon May 24 2021 22:42:34 GMT+0900 ()  All resources are updated in the cloud$

4. Add Predictions

Now, the primary function.
Add Predictions to use the "Translate language" function.

$ amplify add predictions? Please select from one of the categories below Convert? What would you like to convert? Translate text into a different language? Provide a friendly name for your resource translateText20591e92? What is the source language? English? What is the target language? Japanese? Who should have access? Auth and Guest usersAuth configuration is required to allow unauthenticated users, but it is not configured properly.Successfully updated auth resource locally.Successfully added resource translateText20591e92 locallySome next steps:"amplify push" builds all of your local backend resources and provisions them in the cloud"amplify publish" builds all of your local backend and front-end resources (if you added hosting category) and provisions them in the cloud$

Push the project.

$ amplify push Successfully pulled backend environment dev from the cloud.Current Environment: dev| Category    | Resource name                | Operation | Provider plugin   || ----------- | ---------------------------- | --------- | ----------------- || Predictions | translateText39476081        | Create    | awscloudformation || Auth        | sampleamplifytransla0530875a | Update    | awscloudformation |? Are you sure you want to continue? Yes Updating resources in the cloud. This may take a few minutes...(snip)UPDATE_COMPLETE authsampleamplifytransla4290ed5c        AWS::CloudFormation::Stack Mon May 24 2021 22:51:01 GMT+0900 () UPDATE_COMPLETE amplify-sampleamplifytransla-dev-221649 AWS::CloudFormation::Stack Mon May 24 2021 22:51:01 GMT+0900 ()  All resources are updated in the cloud$

Your src/main.js is below.

import Vue from 'vue'import App from './App.vue'import router from './router'import store from './store'import vuetify from './plugins/vuetify'import '@aws-amplify/ui-vue'import Amplify from 'aws-amplify'import awsconfig from './aws-exports'Amplify.configure(awsconfig)import { AmazonAIPredictionsProvider } from '@aws-amplify/predictions'Amplify.addPluggable(new AmazonAIPredictionsProvider())Vue.config.productionTip = falsenew Vue({  router,  store,  vuetify,  render: (h) => h(App),}).$mount('#app')

If you forget to write Amplify.addPluggable(new AmazonAIPredictionsProvider()) (like me), this system is not work.
Let's check this document.
https://docs.amplify.aws/lib/predictions/getting-started/q/platform/js

5. Add API

Add API(GraphQL) for saving messages.

$ amplify add api? Please select from one of the below mentioned services: GraphQL? Provide API name: sampleamplifytransla? Choose the default authorization type for the API API key? Enter a description for the API key: ? After how many days from now the API key should expire (1-365): 7? Do you want to configure advanced settings for the GraphQL API No, I am done.? Do you have an annotated GraphQL schema? No? Choose a schema template: Single object with fields (e.g., Todo with ID, name, description)The following types do not have '@auth' enabled. Consider using @auth with @model         - TodoLearn more about @auth here: https://docs.amplify.aws/cli/graphql-transformer/authGraphQL schema compiled successfully.Edit your schema at /[YOUR_DIRECTORY]/sample-amplify-translator-chat/amplify/backend/api/sampleamplifytransla/schema.graphql or place .graphql files in a directory at /[YOUR_DIRECTORY]/sample-amplify-translator-chat/amplify/backend/api/sampleamplifytransla/schema? Do you want to edit the schema now? NoSuccessfully added resource sampleamplifytransla locallySome next steps:"amplify push" will build all your local backend resources and provision it in the cloud"amplify publish" will build all your local backend and frontend resources (if you have hosting category added) and provision it in the cloud$

Change amplify/backend/api/sampleamplifytransla/schema.graphql below.

type Message @model {  id: ID!  userName: String!  originalMessage: String!  translatedMessage: String!  createdAt: AWSDateTime}

Push the project.

$ amplify push Successfully pulled backend environment dev from the cloud.Current Environment: dev| Category    | Resource name                | Operation | Provider plugin   || ----------- | ---------------------------- | --------- | ----------------- || Api         | sampleamplifytransla         | Create    | awscloudformation || Auth        | sampleamplifytransla4290ed5c | No Change | awscloudformation || Predictions | translateText20591e92        | No Change | awscloudformation |? Are you sure you want to continue? YesThe following types do not have '@auth' enabled. Consider using @auth with @model         - MessageLearn more about @auth here: https://docs.amplify.aws/cli/graphql-transformer/authGraphQL schema compiled successfully.Edit your schema at /[YOUR_DIRECTORY]/sample-amplify-translator-chat/amplify/backend/api/sampleamplifytransla/schema.graphql or place .graphql files in a directory at /[YOUR_DIRECTORY]/sample-amplify-translator-chat/amplify/backend/api/sampleamplifytransla/schema? Do you want to generate code for your newly created GraphQL API Yes? Choose the code generation language target javascript? Enter the file name pattern of graphql queries, mutations and subscriptions src/graphql/**/*.js? Do you want to generate/update all possible GraphQL operations - queries, mutations and subscriptions Yes? Enter maximum statement depth [increase from default if your schema is deeply nested] 2 Updating resources in the cloud. This may take a few minutes...(snip) Generated GraphQL operations successfully and saved at src/graphql All resources are updated in the cloudGraphQL endpoint: https://XXXXXXXXXXXXXXXXXXXXXXXXXX.appsync-api.ap-northeast-1.amazonaws.com/graphqlGraphQL API KEY: XXX-XXXXXXXXXXXXXXXXXXXXXXXXXX$

6. Implementation

OK, we can implement the chat to include the translate function.

If you want to know about code detail, please see this repository.

src/views/Chat.vue

<template>  <v-container>    <v-row>      <v-col class="pb-0" cols="12" sm="8">        <v-text-field          v-model="userName"          label="User Name"          outlined        ></v-text-field      ></v-col>      <v-col class="pb-0" cols="6" sm="2">        <v-select          :items="languages"          label="Original Language"          outlined          v-model="fromLang"        ></v-select>      </v-col>      <v-col class="pb-0" cols="6" sm="2">        <v-select          :items="languages"          label="Translate to"          outlined          v-model="toLang"        ></v-select>      </v-col>      <v-col class="pt-0" cols="12">        <v-text-field          v-model="message"          label="Message"          outlined          append-outer-icon="mdi-send"          @click:append-outer="sendMessage"        ></v-text-field></v-col    ></v-row>    <Timeline :messages="computedSortedMessages"></Timeline>  </v-container></template><script>import { API, graphqlOperation, Predictions } from 'aws-amplify'import { listMessages } from '@/graphql/queries'import { createMessage } from '@/graphql/mutations'import { onCreateMessage } from '@/graphql/subscriptions'import Timeline from '../components/Timeline'export default {  components: { Timeline },  computed: {    computedSortedMessages: function () {      return this.messages        .slice()        .sort((a, b) => (a.createdAt < b.createdAt ? 1 : -1))    },  },  data: function () {    return {      userName: '',      message: '',      fromLang: '',      toLang: '',      messages: [],      languages: ['en', 'ja'],      onCreateMessageSubscription: null,    }  },  created: async function () {    const result = await API.graphql(graphqlOperation(listMessages))    console.log(result)    this.messages = result.data.listMessages.items    this.unsubscribe = API.graphql(graphqlOperation(onCreateMessage)).subscribe(      {        next: ({ provider, value }) => {          console.log({ provider, value })          this.messages.push(value.data.onCreateMessage)        },      },    )  },  beforeDestroy: function () {    if (this.onCreateMessageSubscription) {      this.onCreateMessageSubscription.unsubscribe()      this.onCreateMessageSubscription = null    }  },  methods: {    sendMessage: async function () {      console.log('sendMessage', this.message)      const result = await Predictions.convert({        translateText: {          source: {            text: this.message,            language: this.fromLang,            // supported languages https://docs.aws.amazon.com/translate/latest/dg/how-it-works.html#how-it-works-language-codes          },          targetLanguage: this.toLang,        },      })      console.log(result)      const message = await API.graphql(        graphqlOperation(createMessage, {          input: {            userName: this.userName,            originalMessage: this.message,            translatedMessage: result.text,          },        }),      )      console.log(message)      this.userName = ''      this.message = ''      this.fromLang = ''      this.toLang = ''    },  },}</script><style></style>

src/components/Timeline.vue

<template>  <v-row>    <v-col class="pb-0" cols="12" v-for="message in messages" :key="message.id">      <v-card class="ma-4">        <v-row>          <v-col cols="12" class="px-5 text-h5 font-weight-light">            {{ message.userName }}</v-col          >        </v-row>        <v-row>          <v-col class="py-0" cols="6">            <v-card outlined color="grey lighten-3">              <v-card-subtitle class="caption">Original</v-card-subtitle>              <v-card-text class="body-1">                {{ message.originalMessage }}</v-card-text              >            </v-card></v-col          >          <v-col class="px-8" cols="6">{{ message.translatedMessage }}</v-col>        </v-row>      </v-card>    </v-col>  </v-row></template><script>export default {  props: {    messages: {      type: Array,    },  },}</script><style></style>

7. Checking

You can see the chat like the below movie.

AWS Amplify is one of the easy ways to use Amazon Translate.


Original Link: https://dev.to/aws-builders/simple-chat-with-translator-by-aws-amplify-o18

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