1import { F7Exception } from "../errors/F7Exception";
 2import { Complex } from "../models/common/Types";
 3import { Numbers } from "./Numbers";
 4
 5export class Predicates {
 6  /**
 7   * Used to filter lists to values that are numeric: they are a Boolean, or a Double.
 8   *
 9   * @param value - to check
10   * @return - true if value is instance of Double, or Boolean. Otherwise false.
11   */
12  static isNumeric(value: any): boolean {
13    return typeof value === "number" || typeof value === "boolean";
14  }
15
16  /**
17   * Is the value a numeric value (Double or Boolean) or a coercable string?
18   *
19   * @param value - to check
20   * @return - true if value is instance of Double, or Boolean, or is a String that can be converted to Double.
21   */
22  static isCoercableToNumeric(value: any): boolean {
23    return Predicates.isNumeric(value) || Predicates.isCoercableString(value);
24  }
25
26  /**
27   * Is it straight-up a number?
28   * @param value - to check.
29   */
30  static isLiteralNumber(value: any): boolean {
31    return typeof value === "number";
32  }
33
34  /**
35   * Can we coerce this string to a number value?
36   *
37   * @param value - to test.
38   * @return true if we can get a Double from this value.
39   */
40  static isCoercableString(value: any): boolean {
41    if (typeof value === "string") {
42      if (Numbers.toNumberOrNull(value) !== null) {
43        return true;
44      }
45    }
46    return false;
47  }
48
49  /**
50   * Is the value NOT an error.
51   * @param value - value to check
52   */
53  static isNonError(value: Complex) {
54    return !(value instanceof F7Exception);
55  }
56}