cdk-monitoring-constructs
Version:
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89 lines • 9.71 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.getShortHash = exports.getHashForMetricExpressionId = exports.removeBracketsWithDynamicLabels = exports.capitalizeFirstLetterOnly = exports.capitalizeFirstLetter = void 0;
/**
* matches all strings enclosed in brackets
*/
const STRINGS_IN_BRACKETS_REGEXP = /(\(.+?\))/g;
/**
* matches one or more whitespace characters
*/
const ONE_OR_MORE_WHITESPACE_REGEXP = /\s+/g;
/**
* something we can use to identify brackets with dynamic labels
*/
const DYNAMIC_LABEL_MARKER = "${";
/**
* Capitalize first letter, leave the rest as-is.
* @param str string to process
*/
function capitalizeFirstLetter(str) {
return str.charAt(0).toUpperCase() + str.slice(1);
}
exports.capitalizeFirstLetter = capitalizeFirstLetter;
/**
* Capitalize first letter, make the rest lower-case.
* @param str string to process
*/
function capitalizeFirstLetterOnly(str) {
return capitalizeFirstLetter(str.toLowerCase());
}
exports.capitalizeFirstLetterOnly = capitalizeFirstLetterOnly;
/**
* Removes pieces of string that are enclosed in brackets and contain placeholders.
* For example, for "label (avg: ${AVG})" it returns "label".
* This is useful for annotations, because they do not replace the placeholders properly.
* @param label label to process
*/
function removeBracketsWithDynamicLabels(label) {
let result = label;
const stringsInBrackets = label.match(STRINGS_IN_BRACKETS_REGEXP);
if (stringsInBrackets) {
for (const stringInBrackets of stringsInBrackets) {
if (stringInBrackets.includes(DYNAMIC_LABEL_MARKER)) {
// if this bracket contains dynamic label, we just remove it
result = result.replace(stringInBrackets, "");
}
}
}
// we can end up with some extra spaces, so let's fix it
result = result.replace(ONE_OR_MORE_WHITESPACE_REGEXP, " ").trim();
return result;
}
exports.removeBracketsWithDynamicLabels = removeBracketsWithDynamicLabels;
/**
* Simple hashing function to generate hash-based metric expression ID.
* This function is insecure and outputs a hexadecimal string.
* @param str string to encode
* @return hexadecimal hash
*/
function getHashForMetricExpressionId(str) {
return getShortHash(str);
}
exports.getHashForMetricExpressionId = getHashForMetricExpressionId;
/**
* Simple hashing function to generate short hash for the given string.
* This function is insecure and outputs a hexadecimal string.
* @param str string to encode
* @return hexadecimal hash
*/
function getShortHash(str) {
const seed = 31;
let h1 = 0xdeadbeef ^ seed;
let h2 = 0x41c6ce57 ^ seed;
for (let i = 0, ch; i < str.length; i++) {
ch = str.charCodeAt(i);
h1 = Math.imul(h1 ^ ch, 2654435761);
h2 = Math.imul(h2 ^ ch, 1597334677);
}
h1 =
Math.imul(h1 ^ (h1 >>> 16), 2246822507) ^
Math.imul(h2 ^ (h2 >>> 13), 3266489909);
h2 =
Math.imul(h2 ^ (h2 >>> 16), 2246822507) ^
Math.imul(h1 ^ (h1 >>> 13), 3266489909);
const result = 4294967296 * (2097151 & h2) + (h1 >>> 0);
return result.toString(16);
}
exports.getShortHash = getShortHash;
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