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import shajs from "sha.js";
/**
* Converts string into camelCase.
*
* @see http://stackoverflow.com/questions/2970525/converting-any-string-into-camel-case
*/
export function camelCase(str, firstCapital = false) {
if (firstCapital)
str = " " + str;
return str.replace(/^([A-Z])|[\s-_](\w)/g, function (match, p1, p2) {
if (p2)
return p2.toUpperCase();
return p1.toLowerCase();
});
}
/**
* Converts string into snake_case.
*
*/
export function snakeCase(str) {
return (str
// ABc -> a_bc
.replace(/([A-Z])([A-Z])([a-z])/g, "$1_$2$3")
// aC -> a_c
.replace(/([a-z0-9])([A-Z])/g, "$1_$2")
.toLowerCase());
}
/**
* Converts string into Title Case.
*
* @see http://stackoverflow.com/questions/196972/convert-string-to-title-case-with-javascript
*/
export function titleCase(str) {
return str.replace(/\w\S*/g, (txt) => txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase());
}
/**
* Builds abbreviated string from given string;
*/
export function abbreviate(str, abbrLettersCount = 1) {
const words = str
.replace(/([a-z\xE0-\xFF])([A-Z\xC0\xDF])/g, "$1 $2")
.split(" ");
return words.reduce((res, word) => {
res += word.substr(0, abbrLettersCount);
return res;
}, "");
}
/**
* Shorten a given `input`. Useful for RDBMS imposing a limit on the
* maximum length of aliases and column names in SQL queries.
*
* @param input String to be shortened.
* @param options Default to `4` for segments length, `2` for terms length, `'__'` as a separator.
*
* @return Shortened `input`.
*
* @example
* // returns: "UsShCa__orde__mark__dire"
* shorten('UserShoppingCart__order__market__director')
*
* // returns: "cat_wit_ver_lon_nam_pos_wit_ver_lon_nam_pos_wit_ver_lon_nam"
* shorten(
* 'category_with_very_long_name_posts_with_very_long_name_post_with_very_long_name',
* { separator: '_', segmentLength: 3 }
* )
*
* // equals: UsShCa__orde__mark_market_id
* `${shorten('UserShoppingCart__order__market')}_market_id`
*/
export function shorten(input, options = {}) {
const { segmentLength = 4, separator = "__", termLength = 2 } = options;
const segments = input.split(separator);
const shortSegments = segments.reduce((acc, val) => {
// split the given segment into many terms based on an eventual camel cased name
const segmentTerms = val
.replace(/([a-z\xE0-\xFF])([A-Z\xC0-\xDF])/g, "$1 $2")
.split(" ");
// "OrderItemList" becomes "OrItLi", while "company" becomes "comp"
const length = segmentTerms.length > 1 ? termLength : segmentLength;
const shortSegment = segmentTerms
.map((term) => term.substr(0, length))
.join("");
acc.push(shortSegment);
return acc;
}, []);
return shortSegments.join(separator);
}
/**
* Returns a hashed input.
*
* @param input String to be hashed.
* @param options.length Optionally, shorten the output to desired length.
*/
export function hash(input, options = {}) {
const hashFunction = shajs("sha1");
hashFunction.update(input, "utf8");
const hashedInput = hashFunction.digest("hex");
if (options.length) {
return hashedInput.slice(0, options.length);
}
return hashedInput;
}
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