102 lines
2.5 KiB
TypeScript
102 lines
2.5 KiB
TypeScript
import * as plugins from './smartcsv.plugins';
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export interface ICsvConstructorOptions {
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headers: boolean;
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}
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export class Csv {
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public static async createCsvFromString(
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csvStringArg: string,
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optionsArg: ICsvConstructorOptions
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): Promise<Csv> {
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const csvInstance = new Csv(csvStringArg, optionsArg);
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return csvInstance;
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}
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public csvString: string;
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public headers: string[];
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public keyFrame: string = null;
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public options: ICsvConstructorOptions = {
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headers: true
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};
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constructor(csvStringArg: string, optionsArg: ICsvConstructorOptions) {
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this.csvString = csvStringArg;
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this.options = optionsArg;
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this.determineKeyframe();
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}
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/**
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* determines the keyframe of the csv string
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*/
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public determineKeyframe() {
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let commaLength = 0;
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let semicolonLength = 0;
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const commaRegexResult = this.csvString.match(/,/g);
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const semicolonRegexResult = this.csvString.match(/;/g);
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if (commaRegexResult) {
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commaLength = commaRegexResult.length;
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}
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if (semicolonRegexResult) {
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semicolonLength = semicolonRegexResult.length;
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}
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// tslint:disable-next-line:prefer-conditional-expression
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if (commaLength < semicolonLength) {
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this.keyFrame = ';';
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} else {
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this.keyFrame = ',';
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}
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}
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/**
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* serializes the csv string
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*/
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public serializeCsvString() {
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const rowArray = this.getRows();
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const resultArray = [];
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if (this.options.headers) {
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this.getHeaders();
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rowArray.shift();
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}
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for (const row of rowArray) {
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resultArray.push(row.split(this.keyFrame));
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}
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return resultArray;
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}
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public getRows(): string[] {
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const rowsArray = this.csvString.split('\n');
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if (rowsArray[rowsArray.length - 1] === '') {
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rowsArray.pop();
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}
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return rowsArray;
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}
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public getHeaders() {
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const rowArray = this.getRows();
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if (this.options.headers) {
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let headerRow = rowArray[0];
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this.headers = headerRow.split(this.keyFrame);
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}
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return this.headers;
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}
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public createDataObject(dataArray: string[]) {
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const neededIterations = dataArray.length;
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let resultJson: any = {};
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for (let i = 0; i < neededIterations; i++) {
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resultJson[this.headers[i]] = dataArray[i];
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}
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return resultJson;
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}
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public async exportAsObject(): Promise<any> {
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const serializedData = this.serializeCsvString();
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const dataObjects = [];
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for (const dataArray of serializedData) {
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dataObjects.push(this.createDataObject(dataArray));
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}
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return dataObjects;
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}
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}
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