1import {
 2  NAError
 3} from "../Errors";
 4
 5/**
 6 * Static class to check argument length within expected ranges when calling functions.
 7 */
 8class ArgsChecker {
 9  /**
10   * Checks to see if the arguments are of the correct length.
11   * @param args to check length of
12   * @param length expected length
13   * @param caller name of the function calling this function, for use in error message formatting
14   */
15  static checkLength(args: Array<any> | IArguments, length: number, caller?: string) {
16    if (args.length !== length) {
17      let functionName = caller !== undefined ? " to " + caller : "";
18      throw new NAError("Wrong number of arguments" + functionName + ". Expected " + length
19          + " arguments, but got " + args.length + " arguments.");
20    }
21  }
22
23  /**
24   * Checks to see if the arguments are at least a certain length.
25   * @param args to check length of
26   * @param length expected length
27   * @param caller name of the function calling this function, for use in error message formatting
28   */
29  static checkAtLeastLength(args: any, length: number, caller?: string) {
30    if (args.length < length) {
31      let functionName = caller !== undefined ? " to " + caller : "";
32      throw new NAError("Wrong number of arguments" + functionName + ". Expected " + length
33        + " arguments, but got " + args.length + " arguments.");
34    }
35  }
36
37  /**
38   * Checks to see if the arguments are within a max and min, inclusively
39   * @param args to check length of
40   * @param low least number of arguments
41   * @param high max number of arguments
42   * @param caller name of the function calling this function, for use in error message formatting
43   */
44  static checkLengthWithin(args: any, low: number, high: number, caller?: string) {
45    if (args.length > high || args.length < low) {
46      let functionName = caller !== undefined ? " to " + caller : "";
47      throw new NAError("Wrong number of arguments" + functionName + ". Expected between " + low
48        + " and " + high + " arguments, but got " + args.length + " arguments.");
49    }
50  }
51}
52
53export {
54  ArgsChecker
55}