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August 21, 2019 09:00
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| /** @format */ | |
| //@ts-check | |
| /** | |
| Vodafone coding challenge | |
| You have been tasked with creating a helper function that will be used to determine the output | |
| of an array of data. | |
| Each element of the array has the following structure: | |
| { | |
| state: <String> - a state to go to | |
| errorCode: <String> - optional error code | |
| } | |
| The states have different functionalities: | |
| 'processing' = delay by 2 seconds, then fetch the next state | |
| 'error' = handle the error code provided (see below) | |
| 'success' = return from the helper with the object: { title: 'Order complete' message: null } | |
| Handling error codes: | |
| 'NO_STOCK' = return from the helper with an object: { title: 'Error page', message: 'No stock has been found' } | |
| 'INCORRECT_DETAILS' = return from the helper with an object: { title: 'Error page', message: 'Incorrect details have been entered' } | |
| null = return from the helper with an object: { title: 'Error page', message: null } | |
| undefined = return from the helper with an object: { title: 'Error page', message: null } | |
| Example usage: | |
| ------- | |
| getProcessingPage([{ state: 'processing' }, { state: 'error' }]) | |
| => should return after 2 seconds with the object: { title: 'Error page', message: null } | |
| Notes: | |
| - Provide the code and a description of how to run it | |
| **/ | |
| /** | |
| * Gets the processing page | |
| * @param {array} data | |
| */ | |
| const getProcessingPage = async (data = []) => { | |
| const error_code = { | |
| NO_STOCK: { | |
| title: 'Error page', | |
| message: 'No stock has been found' | |
| }, | |
| INCORRECT_DETAILS: { | |
| title: 'Error page', | |
| message: 'Incorrect details have been entered' | |
| }, | |
| null: {title: 'Error page', message: null}, | |
| undefined: {title: 'Error page', message: null} | |
| } | |
| const state = { | |
| processing: code => { | |
| return new Promise(function(resolve, reject) { | |
| setTimeout(function() { | |
| resolve(state[code.state](code.errorCode || null)) | |
| }, 2000) | |
| }) | |
| }, | |
| error: code => error_code[code], | |
| success: code => { | |
| return {title: 'Order complete', message: null} | |
| } | |
| } | |
| return await state[data[0].state](data[1]) | |
| } | |
| /** | |
| * | |
| */ | |
| const result = getProcessingPage([{state: 'success'}, {state: 'error'}]) | |
| result.then(data => console.log('log result: ', data)) |
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