Current File : /var/www/projetos/stb.ind.br/wp-content/themes/stb/node_modules/gettext-parser/lib/shared.js
module.exports.parseHeader = parseHeader;
module.exports.generateHeader = generateHeader;
module.exports.formatCharset = formatCharset;
module.exports.foldLine = foldLine;
/**
* Parses a header string into an object of key-value pairs
*
* @param {String} str Header string
* @return {Object} An object of key-value pairs
*/
function parseHeader (str = '') {
const lines = str.split('\n');
const headers = {};
lines.forEach(line => {
const parts = line.trim().split(':');
const key = (parts.shift() || '').trim().toLowerCase();
const value = parts.join(':').trim();
if (!key) {
return;
}
headers[key] = value;
});
return headers;
}
/**
* Convert first letters after - to uppercase, other lowercase
*
* @param {String} str String to be updated
* @return {String} A string with uppercase words
*/
function upperCaseWords (str = '') {
return str.toLowerCase()
.trim()
.replace(
/^(MIME|POT?(?=-)|[a-z])|-[a-z]/gi,
str => str.toUpperCase()
);
}
/**
* Joins a header object of key value pairs into a header string
*
* @param {Object} header Object of key value pairs
* @return {String} Header string
*/
function generateHeader (header = {}) {
const keys = Object.keys(header)
.filter(key => !!key);
if (!keys.length) {
return '';
}
return keys.map(key =>
`${upperCaseWords(key)}: ${(header[key] || '').trim()}`
)
.join('\n') + '\n';
}
/**
* Normalizes charset name. Converts utf8 to utf-8, WIN1257 to windows-1257 etc.
*
* @param {String} charset Charset name
* @return {String} Normalized charset name
*/
function formatCharset (charset = 'iso-8859-1', defaultCharset = 'iso-8859-1') {
return charset.toString()
.toLowerCase()
.replace(/^utf[-_]?(\d+)$/, 'utf-$1')
.replace(/^win(?:dows)?[-_]?(\d+)$/, 'windows-$1')
.replace(/^latin[-_]?(\d+)$/, 'iso-8859-$1')
.replace(/^(us[-_]?)?ascii$/, 'ascii')
.replace(/^charset$/, defaultCharset)
.trim();
}
/**
* Folds long lines according to PO format
*
* @param {String} str PO formatted string to be folded
* @param {Number} [maxLen=76] Maximum allowed length for folded lines
* @return {Array} An array of lines
*/
function foldLine (str, maxLen = 76) {
const lines = [];
const len = str.length;
let curLine = '';
let pos = 0;
let match;
while (pos < len) {
curLine = str.substr(pos, maxLen);
// ensure that the line never ends with a partial escaping
// make longer lines if needed
while (curLine.substr(-1) === '\\' && pos + curLine.length < len) {
curLine += str.charAt(pos + curLine.length);
}
// ensure that if possible, line breaks are done at reasonable places
if ((match = /.*?\\n/.exec(curLine))) {
// use everything before and including the first line break
curLine = match[0];
} else if (pos + curLine.length < len) {
// if we're not at the end
if ((match = /.*\s+/.exec(curLine)) && /[^\s]/.test(match[0])) {
// use everything before and including the last white space character (if anything)
curLine = match[0];
} else if ((match = /.*[\x21-\x2f0-9\x5b-\x60\x7b-\x7e]+/.exec(curLine)) && /[^\x21-\x2f0-9\x5b-\x60\x7b-\x7e]/.test(match[0])) {
// use everything before and including the last "special" character (if anything)
curLine = match[0];
}
}
lines.push(curLine);
pos += curLine.length;
}
return lines;
}
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