/
main.ts
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/
main.ts
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import createQuestion from "./questions/createQuestion";
import deleteQuestion from "./questions/deleteQuestion";
import getQuestionById from "./questions/getQuestionById";
import getAllQuestions from "./questions/getAllQuestions";
import updateQuestion from "./questions/updateQuestion";
import getAllQuestionsFromAllUsers from "./questions/getAllQuestionsFromAllUsers";
import createAnswer from "./answers/createAnswer";
import deleteAnswer from "./answers/deleteAnswer";
import getAnswerById from "./answers/getAnswerById";
import getAllAnswers from "./answers/getAllAnswers";
import updateAnswer from "./answers/updateAnswer";
import createComment from "./comments/createComment";
import deleteComment from "./comments/deleteComment";
import getCommentById from "./comments/getCommentById";
import getAllComments from "./comments/getAllComment";
import updateComment from "./comments/updateComment";
import { QuestionAppSyncEvent, AnswerAppSyncEvent, CommentAppSyncEvent, QuestionInput, TagAppSyncEvent, AuthorAppSyncEvent } from "./types";
// import appendAnswer from "./answers/appendAnswer";
import getTagById from "./tags/getTagById";
import getAllTags from "./tags/getAllTags";
import getAllQuestionsByTag from "./tags/getAllQuestionsByTag";
import getAllAuthors from "./authors/getAllAuthors";
export async function handler(event: any): Promise<any> {
console.log(`EVENT --- ${JSON.stringify(event)}`);
const eventType = getEventType(event);
if (eventType === "Question") {
return handleQuestionEvent(event);
} else if (eventType === "Answer") {
return handleAnswerEvent(event);
} else if (eventType === "Comment") {
return handleCommentEvent(event);
} else if(eventType === "Tag") {
return handleTagEvent(event);
} else if (eventType === "Author") {
return handleAuthorEvent(event)
} else {
throw new Error(`Unknown event type.`);
}
}
// Function to determine the event type based on the field name
function getEventType(event: any): "Question" | "Answer" | "Comment" | "Tag" | "Author" {
switch (event.info.fieldName) {
case "getQuestionById":
case "getAnswersOfAQuestion":
case "getAllQuestions":
case "getAllQuestionsFromAllUsers":
case "createQuestion":
case "updateQuestion":
case "deleteQuestion":
return "Question";
case "getAnswerById":
case "getAllAnswers":
case "createAnswer":
case "updateAnswer":
case "deleteAnswer":
return "Answer";
case "getCommentById":
case "getAllComments":
case "createComment":
case "updateComment":
case "deleteComment":
return "Comment";
case "getAllTags":
case "getTagById":
case "getAllQuestionsByTag":
return "Tag";
case "getAllAuthors":
return "Author";
default:
throw new Error(`Unknown field name: ${event.info.fieldName}`);
}
}
// Handler function for question events
function handleQuestionEvent(event: QuestionAppSyncEvent) {
switch (event.info.fieldName) {
case "getQuestionById":
// console.log(`QUESTION ---${JSON.stringify(event)}`);
return getQuestionById(event.arguments.author!, event.arguments.quesId!);
case "getAllQuestions":
// console.log(`QUESTION ---${JSON.stringify(event)}`);
return getAllQuestions(event.arguments.author!);
case "getAllQuestionsFromAllUsers":
return getAllQuestionsFromAllUsers();
case "createQuestion":
const questionInput: QuestionInput = {
title: event.arguments.question!.title,
body: event.arguments.question!.body,
author: event.arguments.question!.author,
tags: event.arguments.question!.tags
};
return createQuestion(questionInput);
case "updateQuestion":
return updateQuestion(
event.arguments.author!,
event.arguments.quesId!,
event.arguments.question!
);
case "deleteQuestion":
return deleteQuestion(event.arguments.author!, event.arguments.quesId!);
default:
throw new Error(`Unknown field name: ${event.info.fieldName}`);
}
}
// Handler function for answer events
async function handleAnswerEvent(event: AnswerAppSyncEvent) {
switch (event.info.fieldName) {
case "getAnswerById":
return getAnswerById(event.arguments.answer!.answerAuthor!, event.arguments.ansId!);
case "getAllAnswers":
return getAllAnswers(event.arguments.quesId!);
case "createAnswer":
// const createdAnswer = await createAnswer(event.arguments.quesAuthor!, event.arguments.quesId!, event.arguments.answer!);
// if (createdAnswer) {
// await appendAnswer(createdAnswer.quesAuthor!, createdAnswer.quesId!, createdAnswer);
// }
return createAnswer(event.arguments.answer!);
case "updateAnswer":
return updateAnswer(
event.arguments.answer!.answerAuthor!,
event.arguments.ansId!,
event.arguments.answer!
);
case "deleteAnswer":
return deleteAnswer(event.arguments.answer!.answerAuthor!, event.arguments.ansId!);
default:
throw new Error(`Unknown field name: ${event.info.fieldName}`);
}
}
// Handler function for comment events
function handleCommentEvent(event: CommentAppSyncEvent) {
switch (event.info.fieldName) {
case "getCommentById":
return getCommentById(event.arguments.author!, event.arguments.commId!);
case "getAllComments":
return getAllComments(event.arguments.author!);
case "createComment":
return createComment(event.arguments.parentId!, event.arguments.comment!);
case "updateComment":
return updateComment(
event.arguments.author!,
event.arguments.commId!,
event.arguments.comment!
);
case "deleteComment":
return deleteComment(event.arguments.author!, event.arguments.commId!);
default:
throw new Error(`Unknown field name: ${event.info.fieldName}`);
}
}
// Handler function for tag events
function handleTagEvent(event: TagAppSyncEvent) {
switch (event.info.fieldName) {
case "getTagById":
return getTagById(event.arguments.tagName!);
case "getAllTags":
return getAllTags();
case "getAllQuestionsByTag":
return getAllQuestionsByTag(event.arguments.tagName!);
default:
throw new Error(`Unknown field name: ${event.info.fieldName}`);
}
}
function handleAuthorEvent(event: AuthorAppSyncEvent) {
switch (event.info.fieldName) {
case "getAllAuthors":
return getAllAuthors();
default:
throw new Error(`Unknown field name: ${event.info.fieldName}`);
}
}