univ-conv/commonjs/converters/TextConverter.js

The universal binary and text converter

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.TextConverter = void 0;
const AbstractConverter_1 = require("./AbstractConverter");
const core_1 = require("./core");
const StringUtil_1 = require("./StringUtil");
class TextConverter extends AbstractConverter_1.AbstractConverter {
    constructor() {
        super(...arguments);
        this.type = "text";
    }
    empty() {
        return "";
    }
    is(input, options) {
        return typeof input === "string" && options.inputStringType === "text";
    }
    async _from(input, options) {
        const converter = (0, AbstractConverter_1._)()._find(input, options);
        return await converter.toText(input, options);
    }
    async _getStartEnd(input, options) {
        const size = await this.size(input, options);
        return (0, core_1.getStartEnd)(options, size);
    }
    _isEmpty(input) {
        return !input;
    }
    _merge(chunks) {
        return Promise.resolve(chunks.join(""));
    }
    async _size(input, options) {
        const u8 = await this._toUint8Array(input, (0, core_1.deleteStartLength)(options));
        return u8.byteLength;
    }
    async _toArrayBuffer(input, options) {
        const u8 = await this._toUint8Array(input, options);
        return u8.buffer.slice(u8.byteOffset, u8.byteOffset + u8.byteLength);
    }
    async _toBase64(input, options) {
        const u8 = await this._toUint8Array(input, options);
        return await (0, AbstractConverter_1._)()._of("uint8array").toBase64(u8, (0, core_1.deleteStartLength)(options));
    }
    async _toText(input, options) {
        if (options.bufferToTextCharset === options.textToBufferCharset &&
            (0, core_1.hasNoStartLength)(options)) {
            return input;
        }
        const u8 = await this._toUint8Array(input, options);
        const textHelper = await (0, StringUtil_1.getTextHelper)();
        return await textHelper.bufferToText(u8, options);
    }
    async _toUint8Array(input, options) {
        const textHelper = await (0, StringUtil_1.getTextHelper)();
        return await textHelper.textToBuffer(input, options);
    }
}
exports.TextConverter = TextConverter;
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