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mod.ts
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mod.ts
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import { matches } from "../dependencies.ts";
const starSub = /((\d+\.)*\d+)\.\*/;
function incrementLastNumber(list: number[]) {
const newList = [...list];
newList[newList.length - 1]++;
return newList;
}
/**
* Will take in a range, like `>1.2` or `<1.2.3.4` or `=1.2` or `1.*`
* and return a checker, that has the check function for checking that a version is in the valid
* @param range
* @returns
*/
export function rangeOf(range: string | Checker): Checker {
return Checker.parse(range);
}
/**
* Used to create a checker that will `and` all the ranges passed in
* @param ranges
* @returns
*/
export function rangeAnd(...ranges: (string | Checker)[]): Checker {
if (ranges.length === 0) {
throw new Error("No ranges given");
}
const [firstCheck, ...rest] = ranges;
return Checker.parse(firstCheck).and(...rest);
}
/**
* Used to create a checker that will `or` all the ranges passed in
* @param ranges
* @returns
*/
export function rangeOr(...ranges: (string | Checker)[]): Checker {
if (ranges.length === 0) {
throw new Error("No ranges given");
}
const [firstCheck, ...rest] = ranges;
return Checker.parse(firstCheck).or(...rest);
}
/**
* This will negate the checker, so given a checker that checks for >= 1.0.0, it will check for < 1.0.0
* @param range
* @returns
*/
export function notRange(range: string | Checker): Checker {
return rangeOf(range).not();
}
/**
* EmVer is a set of versioning of any pattern like 1 or 1.2 or 1.2.3 or 1.2.3.4 or ..
*/
export class EmVer {
/**
* Convert the range, should be 1.2.* or * into a emver
* Or an already made emver
* IsUnsafe
*/
static from(range: string | EmVer): EmVer {
if (range instanceof EmVer) {
return range;
}
return EmVer.parse(range);
}
/**
* Convert the range, should be 1.2.* or * into a emver
* IsUnsafe
*/
static parse(range: string): EmVer {
const values = range.split(".").map((x) => parseInt(x));
for (const value of values) {
if (isNaN(value)) {
throw new Error(`Couldn't parse range: ${range}`);
}
}
return new EmVer(values);
}
private constructor(public readonly values: number[]) {}
/**
* Used when we need a new emver that has the last number incremented, used in the 1.* like things
*/
public withLastIncremented() {
return new EmVer(incrementLastNumber(this.values));
}
public greaterThan(other: EmVer): boolean {
for (const i in this.values) {
if (other.values[i] == null) {
return true;
}
if (this.values[i] > other.values[i]) {
return true;
}
if (this.values[i] < other.values[i]) {
return false;
}
}
return false;
}
public equals(other: EmVer): boolean {
if (other.values.length !== this.values.length) {
return false;
}
for (const i in this.values) {
if (this.values[i] !== other.values[i]) {
return false;
}
}
return true;
}
public greaterThanOrEqual(other: EmVer): boolean {
return this.greaterThan(other) || this.equals(other);
}
public lessThanOrEqual(other: EmVer): boolean {
return !this.greaterThan(other);
}
public lessThan(other: EmVer): boolean {
return !this.greaterThanOrEqual(other);
}
/**
* Return a enum string that describes (used for switching/iffs)
* to know comparison
* @param other
* @returns
*/
public compare(other: EmVer) {
if (this.equals(other)) {
return "equal" as const;
} else if (this.greaterThan(other)) {
return "greater" as const;
} else {
return "less" as const;
}
}
/**
* Used when sorting emver's in a list using the sort method
* @param other
* @returns
*/
public compareForSort(other: EmVer) {
return matches.matches(this.compare(other))
.when("equal", () => 0 as const)
.when("greater", () => 1 as const)
.when("less", () => -1 as const)
.unwrap();
}
}
/**
* A checker is a function that takes a version and returns true if the version matches the checker.
* Used when we are doing range checking, like saying ">=1.0.0".check("1.2.3") will be true
*/
export class Checker {
/**
* Will take in a range, like `>1.2` or `<1.2.3.4` or `=1.2` or `1.*`
* and return a checker, that has the check function for checking that a version is in the valid
* @param range
* @returns
*/
static parse(range: string | Checker): Checker {
if (range instanceof Checker) {
return range;
}
range = range.trim();
if (range.indexOf("||") !== -1) {
return rangeOr(...range.split("||").map((x) => Checker.parse(x)));
}
if (range.indexOf("&&") !== -1) {
return rangeAnd(...range.split("&&").map((x) => Checker.parse(x)));
}
if (range === "*") {
return new Checker((version) => {
EmVer.from(version);
return true;
});
}
if (range.startsWith("!")) {
return Checker.parse(range.substring(1)).not();
}
const starSubMatches = starSub.exec(range);
if (starSubMatches != null) {
const emVarLower = EmVer.parse(starSubMatches[1]);
const emVarUpper = emVarLower.withLastIncremented();
return new Checker((version) => {
const v = EmVer.from(version);
return (v.greaterThan(emVarLower) || v.equals(emVarLower)) &&
!v.greaterThan(emVarUpper) && !v.equals(emVarUpper);
});
}
switch (range.substring(0, 2)) {
case ">=": {
const emVar = EmVer.parse(range.substring(2));
return new Checker((version) => {
const v = EmVer.from(version);
return v.greaterThanOrEqual(emVar);
});
}
case "<=": {
const emVar = EmVer.parse(range.substring(2));
return new Checker((version) => {
const v = EmVer.from(version);
return v.lessThanOrEqual(emVar);
});
}
}
switch (range.substring(0, 1)) {
case ">": {
console.log("greaterThan");
const emVar = EmVer.parse(range.substring(1));
return new Checker((version) => {
const v = EmVer.from(version);
return v.greaterThan(emVar);
});
}
case "<": {
const emVar = EmVer.parse(range.substring(1));
return new Checker((version) => {
const v = EmVer.from(version);
return v.lessThan(emVar);
});
}
case "=": {
const emVar = EmVer.parse(range.substring(1));
return new Checker((version) => {
const v = EmVer.from(version);
return v.equals(emVar);
});
}
}
throw new Error("Couldn't parse range: " + range);
}
constructor(
/**
* Check is the function that will be given a emver or unparsed emver and should give if it follows
* a pattern
*/
public readonly check: (value: string | EmVer) => boolean,
) {}
/**
* Used when we want the `and` condition with another checker
*/
public and(...others: (Checker | string)[]): Checker {
return new Checker((value) => {
if (!this.check(value)) {
return false;
}
for (const other of others) {
if (!Checker.parse(other).check(value)) {
return false;
}
}
return true;
});
}
/**
* Used when we want the `or` condition with another checker
*/
public or(...others: (Checker | string)[]): Checker {
return new Checker((value) => {
if (this.check(value)) {
return true;
}
for (const other of others) {
if (Checker.parse(other).check(value)) {
return true;
}
}
return false;
});
}
/**
* A useful example is making sure we don't match an exact version, like !=1.2.3
* @returns
*/
public not(): Checker {
return new Checker((value) => !this.check(value));
}
}