import StringUtils from '../common/StringUtils';
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export default class StringBuilder {
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constructor(value = '') {
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this.value = value;
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}
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enableDecoding(encoding) {
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this.encoding = encoding;
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return this;
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}
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append(s) {
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if (typeof s === 'string') {
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this.value += s.toString();
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}
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else if (this.encoding) {
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// use passed format (fromCharCode will return UTF8 encoding)
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this.value += StringUtils.castAsNonUtf8Char(s, this.encoding);
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}
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else {
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// correctly converts from UTF-8, but not other encodings
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this.value += String.fromCharCode(s);
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}
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return this;
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}
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appendChars(str, offset, len) {
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for (let i = offset; offset < offset + len; i++) {
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this.append(str[i]);
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}
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return this;
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}
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length() {
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return this.value.length;
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}
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charAt(n) {
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return this.value.charAt(n);
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}
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deleteCharAt(n) {
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this.value = this.value.substr(0, n) + this.value.substring(n + 1);
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}
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setCharAt(n, c) {
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this.value = this.value.substr(0, n) + c + this.value.substr(n + 1);
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}
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substring(start, end) {
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return this.value.substring(start, end);
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}
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/**
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* @note helper method for RSS Expanded
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*/
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setLengthToZero() {
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this.value = '';
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}
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toString() {
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return this.value;
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}
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insert(n, c) {
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this.value = this.value.substring(0, n) + c + this.value.substring(n);
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}
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}
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