Merge pull request #264 from sasjs/mocker

Mocker

api/src/controllers/mock-sas9.ts

@@ -0,0 +1,143 @@
+import { readFile } from '@sasjs/utils'
+import express from 'express'
+import path from 'path'
+import { Request, Post, Get } from 'tsoa'
+
+export interface Sas9Response {
+  content: string
+  redirect?: string
+  error?: boolean
+}
+
+export interface MockFileRead {
+  content: string
+  error?: boolean
+}
+
+export class MockSas9Controller {
+  private loggedIn: boolean = false
+
+  @Get('/SASStoredProcess')
+  public async sasStoredProcess(): Promise<Sas9Response> {
+    if (!this.loggedIn) {
+      return {
+        content: '',
+        redirect: '/SASLogon/login'
+      }
+    }
+
+    return await getMockResponseFromFile([
+      process.cwd(),
+      'mocks',
+      'generic',
+      'sas9',
+      'sas-stored-process'
+    ])
+  }
+
+  @Post('/SASStoredProcess/do/')
+  public async sasStoredProcessDo(
+    @Request() req: express.Request
+  ): Promise<Sas9Response> {
+    if (!this.loggedIn) {
+      return {
+        content: '',
+        redirect: '/SASLogon/login'
+      }
+    }
+
+    let program = req.query._program?.toString() || ''
+    program = program.replace('/', '')
+
+    const content = await getMockResponseFromFile([
+      process.cwd(),
+      'mocks',
+      ...program.split('/')
+    ])
+
+    if (content.error) {
+      return content
+    }
+
+    const parsedContent = parseJsonIfValid(content.content)
+
+    return {
+      content: parsedContent
+    }
+  }
+
+  @Get('/SASLogon/login')
+  public async loginGet(): Promise<Sas9Response> {
+    return await getMockResponseFromFile([
+      process.cwd(),
+      'mocks',
+      'generic',
+      'sas9',
+      'login'
+    ])
+  }
+
+  @Post('/SASLogon/login')
+  public async loginPost(): Promise<Sas9Response> {
+    this.loggedIn = true
+
+    return await getMockResponseFromFile([
+      process.cwd(),
+      'mocks',
+      'generic',
+      'sas9',
+      'logged-in'
+    ])
+  }
+
+  @Get('/SASLogon/logout')
+  public async logout(): Promise<Sas9Response> {
+    this.loggedIn = false
+
+    return await getMockResponseFromFile([
+      process.cwd(),
+      'mocks',
+      'generic',
+      'sas9',
+      'logged-out'
+    ])
+  }
+}
+
+/**
+ * If JSON is valid it will be parsed otherwise will return text unaltered
+ * @param content string to be parsed
+ * @returns JSON or string
+ */
+const parseJsonIfValid = (content: string) => {
+  let fileContent = ''
+
+  try {
+    fileContent = JSON.parse(content)
+  } catch (err: any) {
+    fileContent = content
+  }
+
+  return fileContent
+}
+
+const getMockResponseFromFile = async (
+  filePath: string[]
+): Promise<MockFileRead> => {
+  const filePathParsed = path.join(...filePath)
+  let error: boolean = false
+
+  let file = await readFile(filePathParsed).catch((err: any) => {
+    const errMsg = `Error reading mocked file on path: ${filePathParsed}\nError: ${err}`
+    console.error(errMsg)
+
+    error = true
+
+    return errMsg
+  })
+
+  return {
+    content: file,
+    error: error
+  }
+}