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Mini Shell
Mini Shell
import * as utils from './utils.js';
import baseLogger from './logger.js';
class Interpolator {
constructor(options = {}) {
this.logger = baseLogger.create('interpolator');
this.options = options;
this.format = (options.interpolation && options.interpolation.format) || (value => value);
this.init(options);
}
/* eslint no-param-reassign: 0 */
init(options = {}) {
if (!options.interpolation) options.interpolation = { escapeValue: true };
const iOpts = options.interpolation;
this.escape = iOpts.escape !== undefined ? iOpts.escape : utils.escape;
this.escapeValue = iOpts.escapeValue !== undefined ? iOpts.escapeValue : true;
this.useRawValueToEscape =
iOpts.useRawValueToEscape !== undefined ? iOpts.useRawValueToEscape : false;
this.prefix = iOpts.prefix ? utils.regexEscape(iOpts.prefix) : iOpts.prefixEscaped || '{{';
this.suffix = iOpts.suffix ? utils.regexEscape(iOpts.suffix) : iOpts.suffixEscaped || '}}';
this.formatSeparator = iOpts.formatSeparator
? iOpts.formatSeparator
: iOpts.formatSeparator || ',';
this.unescapePrefix = iOpts.unescapeSuffix ? '' : iOpts.unescapePrefix || '-';
this.unescapeSuffix = this.unescapePrefix ? '' : iOpts.unescapeSuffix || '';
this.nestingPrefix = iOpts.nestingPrefix
? utils.regexEscape(iOpts.nestingPrefix)
: iOpts.nestingPrefixEscaped || utils.regexEscape('$t(');
this.nestingSuffix = iOpts.nestingSuffix
? utils.regexEscape(iOpts.nestingSuffix)
: iOpts.nestingSuffixEscaped || utils.regexEscape(')');
this.nestingOptionsSeparator = iOpts.nestingOptionsSeparator
? iOpts.nestingOptionsSeparator
: iOpts.nestingOptionsSeparator || ',';
this.maxReplaces = iOpts.maxReplaces ? iOpts.maxReplaces : 1000;
this.alwaysFormat = iOpts.alwaysFormat !== undefined ? iOpts.alwaysFormat : false;
// the regexp
this.resetRegExp();
}
reset() {
if (this.options) this.init(this.options);
}
resetRegExp() {
// the regexp
const regexpStr = `${this.prefix}(.+?)${this.suffix}`;
this.regexp = new RegExp(regexpStr, 'g');
const regexpUnescapeStr = `${this.prefix}${this.unescapePrefix}(.+?)${this.unescapeSuffix}${
this.suffix
}`;
this.regexpUnescape = new RegExp(regexpUnescapeStr, 'g');
const nestingRegexpStr = `${this.nestingPrefix}(.+?)${this.nestingSuffix}`;
this.nestingRegexp = new RegExp(nestingRegexpStr, 'g');
}
interpolate(str, data, lng, options) {
let match;
let value;
let replaces;
const defaultData =
(this.options && this.options.interpolation && this.options.interpolation.defaultVariables) ||
{};
function regexSafe(val) {
return val.replace(/\$/g, '$$$$');
}
const handleFormat = key => {
if (key.indexOf(this.formatSeparator) < 0) {
const path = utils.getPathWithDefaults(data, defaultData, key);
return this.alwaysFormat ? this.format(path, undefined, lng) : path;
}
const p = key.split(this.formatSeparator);
const k = p.shift().trim();
const f = p.join(this.formatSeparator).trim();
return this.format(utils.getPathWithDefaults(data, defaultData, k), f, lng, options);
};
this.resetRegExp();
const missingInterpolationHandler =
(options && options.missingInterpolationHandler) || this.options.missingInterpolationHandler;
replaces = 0;
// unescape if has unescapePrefix/Suffix
/* eslint no-cond-assign: 0 */
while ((match = this.regexpUnescape.exec(str))) {
value = handleFormat(match[1].trim());
if (value === undefined) {
if (typeof missingInterpolationHandler === 'function') {
const temp = missingInterpolationHandler(str, match, options);
value = typeof temp === 'string' ? temp : '';
} else {
this.logger.warn(`missed to pass in variable ${match[1]} for interpolating ${str}`);
value = '';
}
} else if (typeof value !== 'string' && !this.useRawValueToEscape) {
value = utils.makeString(value);
}
str = str.replace(match[0], regexSafe(value));
this.regexpUnescape.lastIndex = 0;
replaces++;
if (replaces >= this.maxReplaces) {
break;
}
}
replaces = 0;
// regular escape on demand
while ((match = this.regexp.exec(str))) {
value = handleFormat(match[1].trim());
if (value === undefined) {
if (typeof missingInterpolationHandler === 'function') {
const temp = missingInterpolationHandler(str, match, options);
value = typeof temp === 'string' ? temp : '';
} else {
this.logger.warn(`missed to pass in variable ${match[1]} for interpolating ${str}`);
value = '';
}
} else if (typeof value !== 'string' && !this.useRawValueToEscape) {
value = utils.makeString(value);
}
value = this.escapeValue ? regexSafe(this.escape(value)) : regexSafe(value);
str = str.replace(match[0], value);
this.regexp.lastIndex = 0;
replaces++;
if (replaces >= this.maxReplaces) {
break;
}
}
return str;
}
nest(str, fc, options = {}) {
let match;
let value;
let clonedOptions = { ...options };
clonedOptions.applyPostProcessor = false; // avoid post processing on nested lookup
delete clonedOptions.defaultValue; // assert we do not get a endless loop on interpolating defaultValue again and again
// if value is something like "myKey": "lorem $(anotherKey, { "count": {{aValueInOptions}} })"
function handleHasOptions(key, inheritedOptions) {
const sep = this.nestingOptionsSeparator;
if (key.indexOf(sep) < 0) return key;
const c = key.split(new RegExp(`${sep}[ ]*{`));
let optionsString = `{${c[1]}`;
key = c[0];
optionsString = this.interpolate(optionsString, clonedOptions);
optionsString = optionsString.replace(/'/g, '"');
try {
clonedOptions = JSON.parse(optionsString);
if (inheritedOptions) clonedOptions = { ...inheritedOptions, ...clonedOptions };
} catch (e) {
this.logger.warn(`failed parsing options string in nesting for key ${key}`, e);
return `${key}${sep}${optionsString}`;
}
// assert we do not get a endless loop on interpolating defaultValue again and again
delete clonedOptions.defaultValue;
return key;
}
// regular escape on demand
while ((match = this.nestingRegexp.exec(str))) {
let formatters = [];
/**
* If there is more than one parameter (contains the format separator). E.g.:
* - t(a, b)
* - t(a, b, c)
*
* And those parameters are not dynamic values (parameters do not include curly braces). E.g.:
* - Not t(a, { "key": "{{variable}}" })
* - Not t(a, b, {"keyA": "valueA", "keyB": "valueB"})
*/
let doReduce = false;
if (match[0].includes(this.formatSeparator) && !/{.*}/.test(match[1])) {
const r = match[1].split(this.formatSeparator).map(elem => elem.trim());
match[1] = r.shift();
formatters = r;
doReduce = true;
}
value = fc(handleHasOptions.call(this, match[1].trim(), clonedOptions), clonedOptions);
// is only the nesting key (key1 = '$(key2)') return the value without stringify
if (value && match[0] === str && typeof value !== 'string') return value;
// no string to include or empty
if (typeof value !== 'string') value = utils.makeString(value);
if (!value) {
this.logger.warn(`missed to resolve ${match[1]} for nesting ${str}`);
value = '';
}
if (doReduce) {
value = formatters.reduce((v, f) => this.format(v, f, options.lng, options), value.trim());
}
// Nested keys should not be escaped by default #854
// value = this.escapeValue ? regexSafe(utils.escape(value)) : regexSafe(value);
str = str.replace(match[0], value);
this.regexp.lastIndex = 0;
}
return str;
}
}
export default Interpolator;
Zerion Mini Shell 1.0