dynamodb-toolbox/dist/esm/transformers/prefix.js

Lightweight and type-safe query builder for DynamoDB and TypeScript.

import { pipe } from './pipe.js';
export class Prefixer {
    constructor(prefix, { delimiter = '#' } = {}) {
        this.transformerId = 'prefix';
        this.prefix = prefix;
        this.delimiter = delimiter;
    }
    encode(decoded) {
        return [this.prefix, decoded].join(this.delimiter);
    }
    decode(encoded) {
        return encoded.startsWith(`${this.prefix}${this.delimiter}`)
            ? encoded.slice(this.prefix.length + this.delimiter.length)
            : encoded;
    }
    toJSON() {
        return {
            transformerId: this.transformerId,
            prefix: this.prefix,
            delimiter: this.delimiter
        };
    }
    pipe(transformer) {
        return pipe(this, transformer);
    }
}
export const prefix = (prefix, { delimiter = '#' } = {}) => new Prefixer(prefix, { delimiter });