45 lines
1.2 KiB
TypeScript
45 lines
1.2 KiB
TypeScript
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export class TypeValidation {
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private readonly _general_type: string;
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public get general_type (): string {
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return this._general_type;
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}
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public get string_type (): 'string'|'number'|'boolean'|'array' {
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return this._general_type as 'string'|'number'|'boolean'|'array';
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}
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public constructor (type: string) {
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this._general_type = type;
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}
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public validate_type (value: unknown): boolean {
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return typeof value === this.general_type;
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}
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public to_type (value: unknown): Promise<unknown> {
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if (this.general_type === 'string')
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return Promise.resolve (String (value));
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if (this.general_type === 'number') {
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const as_num = parseInt (String (value));
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if (isNaN (as_num))
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throw new Error ('value is not a number');
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return Promise.resolve (as_num);
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}
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if (this.general_type === 'boolean') {
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const as_num = parseInt (String (value));
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if (
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as_num !== 1 && as_num !== 0
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&& !(/^(?:true|false)$/iu).test (String (value))
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)
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throw new Error ('value is not a boolean');
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return Promise.resolve (
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as_num === 1 || (/true/iu).test (String (value))
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);
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}
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throw new Error ('unknown type');
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}
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}
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