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// Copyright © 2019 The Things Network Foundation, The Things Industries B.V.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
const icu = require('messageformat-parser')
const stringify = function (token) {
if (typeof token === 'string') {
return token.replace(/[A-Z]/g, 'X').replace(/[^X,.~`?:\-_=+!@#$%*(){}[\]"';/ \s]/g, 'x')
}
if (token.type === 'argument') {
return `{${token.arg}}`
}
if (token.type === 'octothorpe') {
return '#'
}
let res = `{${token.arg}, ${token.type},`
for (const c of token.cases) {
const k = c.key === 'other' ? c.key : `=${c.key}`
const s = c.tokens.map(stringify).join('')
res += ` ${k} {${s}}`
}
res += '}'
return res
}
/**
* Replace all the non-ICU text in a format string with x'es.
*
* For example
* "The {name} should contain at least {min, plural, =1 {one character} other {# characters}}"
* "Xxx {name} xxxxxx xxxxxxx xx xxxxx {min, plural, =1 {xxx xxxxxxxxx} other {# xxxxxxxxxx}}"
*
* @param {string} format - The format string.
* @returns {string} - The updated format.
*/
module.exports = function (format) {
return icu.parse(format).map(stringify).join('')
}