Utilities TypeScript

Utilities.ts

class Utilities {

  public static isValidStringHeaders(headers: string): boolean {
    const regex = /^[a-zA-Z0-9,_]+$/;
    return regex.test(headers);
  }

  public static isValidStringHeaders(headers: string): boolean {
    const allowedCharacters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_,';
    for (let i = 0; i < headers.length; i++) {
        if (!allowedCharacters.includes(headers[i])) {
            return false;
        }
    }
    return true;
  }

  public static getCaseInsensitiveValue(obj: { [key: string]: unknown }, key: string): any {
    const foundKey = Object.keys(obj)
        .find(currentKey => currentKey.toLowerCase() === key.toLowerCase());

    return foundKey ? obj[foundKey] : null;
  }

  public static replacePlaceholders(text: string, object: { [key: string]: string }): string {
    Object.keys(object).forEach(key => {
        const regex = new RegExp(`\\[\\[${key}\\]\\]`, 'gi');
        text = text.replace(regex, object[key]);
    });
    return text;
  }

  public static replacePlaceholders(text: string, object: { [key: string]: string }): string {
    Object.keys(object).forEach(key => {
        const placeholder = `[[${key}]]`;
        let index = text.toLowerCase().indexOf(placeholder.toLowerCase());
        console.log('key', {key, placeholder});
        while (index !== -1) {
            text = text.substring(0, index) + object[key] + text.substring(index + placeholder.length);
            index = text.toLowerCase().indexOf(placeholder.toLowerCase(), index + object[key].length);
        }
    });
    return text;
  }

  public static ObjToDictionary(obj: object) : { [key: string]: string } {
    let entries = Object.entries(obj);
    let swappedEntries = entries.map(([key, value]) => [String(value), key]);

    let dic = swappedEntries.reduce((obj : { [key: string]: string }, [value, key]) => {
        obj[key] = value;
        return obj;
    }, {} as { [key: string]: string });

    return dic;
  }

  public static getListWithCSVHeaders(csvString: string): Array<string> {
    const lines = csvString.split('\n');
    const headers = lines[0].trim();
    if(!headers)
      return new Array<string>();

    return headers.split(',');
  }

  public static getStringWithCSVHeaders(csvString: string): string {
    const lines = csvString.split('\n');
    const headers = lines[0].trim();
    if(!headers)
      return '';

    return headers;
  }
}

export default Util;