@rr0/cms/dist/CSVFileReader.js

RR0 Content Management System (CMS)

import csv from "csv-parser";
export class CSVFileReader {
    constructor(stream, logger, columnNames, separator = ";", create = (data) => {
        const obj = {};
        for (const column of columnNames) {
            obj[column] = data[column];
        }
        return obj;
    }) {
        this.stream = stream;
        this.logger = logger;
        this.columnNames = columnNames;
        this.separator = separator;
        this.create = create;
        this.values = [];
    }
    async read() {
        if (this.values.length > 0) {
            this.logger.warn("Overwriting previously read values", this.values);
        }
        this.values = [];
        const columnNames = this.columnNames;
        // eslint-disable-next-line @typescript-eslint/no-this-alias
        const self = this;
        return new Promise((resolve, reject) => {
            const readValues = this.values;
            self.stream
                .pipe(csv({ separator: this.separator }))
                .on("headers", (headers) => {
                if (!columnNames.every((column) => headers.includes(column))) {
                    reject(`Could not find column "${columnNames}" in header`);
                    return;
                }
            })
                .on("data", (data) => {
                const columnValue = this.create(data);
                readValues.push(columnValue);
            })
                .on("end", () => {
                this.logger.debug("Read", readValues);
                this.logger.debug("Read", readValues.length, "values");
                resolve(readValues);
            });
        });
    }
}