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let fs = require('fs');
let { logger } = require('./logging');
function getShortestPrefix(radixTree, key, sliceSize) {
let shortKey = key.substring(0, sliceSize);
let keyCount = radixTree.countPrefix(shortKey);
if (keyCount < 1) {
return null;
}
if (key.length === sliceSize && radixTree.getPrefix(shortKey).includes(key)) {
return null;
}
if (keyCount === 1) {
return shortKey;
}
return getShortestPrefix(radixTree, key, sliceSize + 1);
}
function toISODateString(d) {
function pad(n) { return n < 10 ? '0' + n : n }
return d.getUTCFullYear() + '-'
+ pad(d.getUTCMonth() + 1) + '-'
+ pad(d.getUTCDate()) + 'T'
+ pad(d.getUTCHours()) + ':'
+ pad(d.getUTCMinutes()) + ':'
+ pad(d.getUTCSeconds()) + 'Z'
}
function getBuildInfo(buildInfoPath) {
try {
return fs.readFileSync(buildInfoPath, "utf8");
} catch (err) {
if (err.code === 'ENOENT') {
return "UNKNOWN_" + toISODateString(new Date());
} else {
logger.error("Unexpected Error!", err);
}
}
}
function sleep(ms) {
return new Promise(resolve => {
setTimeout(resolve, ms)
})
}
function isString(s) {
return typeof (s) === 'string' || s instanceof String;
}
function isFunction(f) {
return f && {}.toString.call(f) === '[object Function]';
}
/**
* Parse the prototype tree to return all accessible properties till
* reaching a sentinelPrototype.
*
* Optionally provide a filtering function to return only the names that match.
*
* @param {*} initialObj The starting object to derive the from
* @param {*} sentinelPrototype The prototype that represents the end of the line
* @param {*} filterFunc A fioltering function for the return names
*/
function getObjectKeysToPrototype(initialObj, sentinelPrototype, filterFunc = (e) => true) {
let prototypeChain = []
var targetPrototype = initialObj;
while (Object.getPrototypeOf(targetPrototype) && targetPrototype !== sentinelPrototype) {
targetPrototype = Object.getPrototypeOf(targetPrototype);
prototypeChain.push(targetPrototype);
}
// console.log("Prototype chain: %s", prototypeChain);
let completePropertyNames = prototypeChain.map((obj) => {
return Object.getOwnPropertyNames(obj);
})
return [Object.getOwnPropertyNames(initialObj)].concat.apply([], completePropertyNames).filter(filterFunc);
}
exports.getShortestPrefix = getShortestPrefix;
exports.toISODateString = toISODateString;
exports.getBuildInfo = getBuildInfo;
exports.sleep = sleep;
exports.isString = isString;
exports.isFunction = isFunction;
exports.getObjectKeysToPrototype = getObjectKeysToPrototype;