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import {toPath, get as get_} from '@jsonjoy.com/json-pointer';
import type {Vars} from './Vars';
import type {Expression, Literal, OperatorDefinition, OperatorMap} from './types';
// ----------------------------------------------------- Input operator helpers
export const get = (path: string, data: unknown) => get_(data, toPath(path));
export const throwOnUndef = (value: unknown, def?: unknown) => {
if (value !== undefined) return value;
if (def === undefined) throw new Error('NOT_FOUND');
return def;
};
// ------------------------------------------------------ Type operator helpers
export const type = (value: unknown): string => {
if (value === null) return 'null';
if (value instanceof Array) return 'array';
if (value instanceof Uint8Array) return 'binary';
return typeof value;
};
export const num = (value: unknown): number => +(value as number) || 0;
export const int = (value: unknown): number => ~~(value as number);
export const str = (value: unknown): string => {
if (typeof value !== 'object') return '' + value;
return JSON.stringify(value);
};
// ------------------------------------------------ Comparison operator helpers
export const cmp = (a: any, b: any): 1 | -1 | 0 => (a > b ? 1 : a < b ? -1 : 0);
export const betweenNeNe = (val: any, min: any, max: any): boolean => val > min && val < max;
export const betweenNeEq = (val: any, min: any, max: any): boolean => val > min && val <= max;
export const betweenEqNe = (val: any, min: any, max: any): boolean => val >= min && val < max;
export const betweenEqEq = (val: any, min: any, max: any): boolean => val >= min && val <= max;
// ------------------------------------------------ Arithmetic operator helpers
export const slash = (a: unknown, b: unknown) => {
const divisor = num(b);
if (divisor === 0) throw new Error('DIVISION_BY_ZERO');
const res = num(a) / divisor;
return Number.isFinite(res) ? res : 0;
};
export const mod = (a: unknown, b: unknown) => {
const divisor = num(b);
if (divisor === 0) throw new Error('DIVISION_BY_ZERO');
const res = num(a) % divisor;
return Number.isFinite(res) ? res : 0;
};
// ----------------------------------------- Generic container operator helpers
export const len = (value: unknown): number => {
switch (typeof value) {
case 'string':
return value.length;
case 'object': {
if (value instanceof Array) return value.length;
if (value instanceof Uint8Array) return value.length;
if (!value) return 0;
return Object.keys(value).length;
}
default:
return 0;
}
};
export const member = (container: unknown, index: unknown): unknown => {
switch (typeof container) {
case 'string': {
const i = int(index);
if (i < 0 || i >= container.length) return undefined;
return container[i];
}
case 'object': {
Iif (!container) throw new Error('NOT_CONTAINER');
if (container instanceof Array || container instanceof Uint8Array) {
const i = int(index);
if (i < 0 || i >= container.length) return undefined;
return container[i];
}
switch (typeof index) {
case 'string':
case 'number':
return (container as any)[index];
default:
throw new Error('NOT_STRING_INDEX');
}
}
default:
throw new Error('NOT_CONTAINER');
}
};
export const asBin = (value: unknown): Uint8Array => {
if (value instanceof Uint8Array) return value;
throw new Error('NOT_BINARY');
};
// ---------------------------------------------------- String operator helpers
export const asStr = (value: unknown): string => {
if (typeof value === 'string') return value;
throw new Error('NOT_STRING');
};
export const starts = (outer: unknown, inner: unknown): boolean => {
return str(outer).startsWith(str(inner));
};
export const contains = (outer: unknown, inner: unknown): boolean => {
return str(outer).indexOf(str(inner)) > -1;
};
export const ends = (outer: unknown, inner: unknown): boolean => {
return str(outer).endsWith(str(inner));
};
export const substr = (probablyString: string | unknown, from: number | unknown, to: number | unknown) =>
str(probablyString).slice(int(from), int(to));
const EMAIL_REG =
/^[a-z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?(?:\.[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?)*$/i;
const HOSTNAME_REG =
/^(?=.{1,253}\.?$)[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?(?:\.[a-z0-9](?:[-0-9a-z]{0,61}[0-9a-z])?)*\.?$/i;
const IP4_REG = /^(?:(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)\.){3}(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)$/;
const IP6_REG =
/^((([0-9a-f]{1,4}:){7}([0-9a-f]{1,4}|:))|(([0-9a-f]{1,4}:){6}(:[0-9a-f]{1,4}|((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9a-f]{1,4}:){5}(((:[0-9a-f]{1,4}){1,2})|:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9a-f]{1,4}:){4}(((:[0-9a-f]{1,4}){1,3})|((:[0-9a-f]{1,4})?:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9a-f]{1,4}:){3}(((:[0-9a-f]{1,4}){1,4})|((:[0-9a-f]{1,4}){0,2}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9a-f]{1,4}:){2}(((:[0-9a-f]{1,4}){1,5})|((:[0-9a-f]{1,4}){0,3}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9a-f]{1,4}:){1}(((:[0-9a-f]{1,4}){1,6})|((:[0-9a-f]{1,4}){0,4}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(:(((:[0-9a-f]{1,4}){1,7})|((:[0-9a-f]{1,4}){0,5}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:)))$/i;
const UUID_REG = /^(?:urn:uuid:)?[0-9a-f]{8}-(?:[0-9a-f]{4}-){3}[0-9a-f]{12}$/i;
const NOT_URI_FRAGMENT_REG = /\/|:/;
const URI_REG =
/^(?:[a-z][a-z0-9+\-.]*:)(?:\/?\/(?:(?:[a-z0-9\-._~!$&'()*+,;=:]|%[0-9a-f]{2})*@)?(?:\[(?:(?:(?:(?:[0-9a-f]{1,4}:){6}|::(?:[0-9a-f]{1,4}:){5}|(?:[0-9a-f]{1,4})?::(?:[0-9a-f]{1,4}:){4}|(?:(?:[0-9a-f]{1,4}:){0,1}[0-9a-f]{1,4})?::(?:[0-9a-f]{1,4}:){3}|(?:(?:[0-9a-f]{1,4}:){0,2}[0-9a-f]{1,4})?::(?:[0-9a-f]{1,4}:){2}|(?:(?:[0-9a-f]{1,4}:){0,3}[0-9a-f]{1,4})?::[0-9a-f]{1,4}:|(?:(?:[0-9a-f]{1,4}:){0,4}[0-9a-f]{1,4})?::)(?:[0-9a-f]{1,4}:[0-9a-f]{1,4}|(?:(?:25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(?:25[0-5]|2[0-4]\d|[01]?\d\d?))|(?:(?:[0-9a-f]{1,4}:){0,5}[0-9a-f]{1,4})?::[0-9a-f]{1,4}|(?:(?:[0-9a-f]{1,4}:){0,6}[0-9a-f]{1,4})?::)|[Vv][0-9a-f]+\.[a-z0-9\-._~!$&'()*+,;=:]+)\]|(?:(?:25[0-5]|2[0-4]\d|[01]?\d\d?)\.){3}(?:25[0-5]|2[0-4]\d|[01]?\d\d?)|(?:[a-z0-9\-._~!$&'()*+,;=]|%[0-9a-f]{2})*)(?::\d*)?(?:\/(?:[a-z0-9\-._~!$&'()*+,;=:@]|%[0-9a-f]{2})*)*|\/(?:(?:[a-z0-9\-._~!$&'()*+,;=:@]|%[0-9a-f]{2})+(?:\/(?:[a-z0-9\-._~!$&'()*+,;=:@]|%[0-9a-f]{2})*)*)?|(?:[a-z0-9\-._~!$&'()*+,;=:@]|%[0-9a-f]{2})+(?:\/(?:[a-z0-9\-._~!$&'()*+,;=:@]|%[0-9a-f]{2})*)*)(?:\?(?:[a-z0-9\-._~!$&'()*+,;=:@/?]|%[0-9a-f]{2})*)?(?:#(?:[a-z0-9\-._~!$&'()*+,;=:@/?]|%[0-9a-f]{2})*)?$/i;
const DURATION_REG = /^P(?!$)((\d+Y)?(\d+M)?(\d+D)?(T(?=\d)(\d+H)?(\d+M)?(\d+S)?)?|(\d+W)?)$/;
const DATE_REG = /^(\d\d\d\d)-(\d\d)-(\d\d)$/;
const TIME_REG = /^(\d\d):(\d\d):(\d\d(?:\.\d+)?)(z|([+-])(\d\d)(?::?(\d\d))?)?$/i;
const DATE_TIME_SEPARATOR_REG = /t|\s/i;
export const isEmail = (value: unknown): boolean => typeof value === 'string' && EMAIL_REG.test(value);
export const isHostname = (value: unknown): boolean => typeof value === 'string' && HOSTNAME_REG.test(value);
export const isIp4 = (value: unknown): boolean => typeof value === 'string' && IP4_REG.test(value);
export const isIp6 = (value: unknown): boolean => typeof value === 'string' && IP6_REG.test(value);
export const isUuid = (value: unknown): boolean => typeof value === 'string' && UUID_REG.test(value);
export const isUri = (value: unknown): boolean =>
typeof value === 'string' && NOT_URI_FRAGMENT_REG.test(value) && URI_REG.test(value);
export const isDuration = (value: unknown): boolean => typeof value === 'string' && DURATION_REG.test(value);
const DAYS = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
const isLeapYear = (year: number): boolean => year % 4 === 0 && (year % 100 !== 0 || year % 400 === 0);
export const isDate = (value: unknown): boolean => {
if (typeof value !== 'string') return false;
const matches: string[] | null = DATE_REG.exec(value);
if (!matches) return false;
const year: number = +matches[1];
const month: number = +matches[2];
const day: number = +matches[3];
return month >= 1 && month <= 12 && day >= 1 && day <= (month === 2 && isLeapYear(year) ? 29 : DAYS[month]);
};
export const isTime = (value: unknown): boolean => {
if (typeof value !== 'string') return false;
const matches: string[] | null = TIME_REG.exec(value);
if (!matches) return false;
const hr: number = +matches[1];
const min: number = +matches[2];
const sec: number = +matches[3];
const tz: string | undefined = matches[4];
const tzSign: number = matches[5] === '-' ? -1 : 1;
const tzH: number = +(matches[6] || 0);
const tzM: number = +(matches[7] || 0);
Iif (tzH > 23 || tzM > 59 || !tz) return false;
if (hr <= 23 && min <= 59 && sec < 60) return true;
const utcMin = min - tzM * tzSign;
const utcHr = hr - tzH * tzSign - (utcMin < 0 ? 1 : 0);
return (utcHr === 23 || utcHr === -1) && (utcMin === 59 || utcMin === -1) && sec < 61;
};
export const isDateTime = (str: unknown): boolean => {
if (typeof str !== 'string') return false;
const dateTime = str.split(DATE_TIME_SEPARATOR_REG) as [string, string];
return dateTime.length === 2 && isDate(dateTime[0]) && isTime(dateTime[1]);
};
// ---------------------------------------------------- Binary operator helpers
export const u8 = (bin: unknown, pos: unknown) => {
const buf = asBin(bin);
const index = int(pos);
if (index < 0 || index >= buf.length) throw new Error('OUT_OF_BOUNDS');
return buf[index];
};
// ----------------------------------------------------- Array operator helpers
export const asArr = (value: unknown): unknown[] => {
if (value instanceof Array) return value as unknown[];
throw new Error('NOT_ARRAY');
};
export const head = (operand1: unknown, operand2: unknown): unknown => {
const arr = asArr(operand1);
const count = int(operand2);
return count >= 0 ? arr.slice(0, count) : arr.slice(count);
};
export const concat = (arrays: unknown[]): unknown[] => {
const result: unknown[] = [];
for (const array of arrays) {
asArr(array);
for (const item of array as unknown[]) result.push(item);
}
return result;
};
export const isInArr = (arr: unknown, what: unknown): boolean => {
const arr2 = asArr(arr);
const length = arr2.length;
for (let i = 0; i < length; i++) if (deepEqual(arr2[i], what)) return true;
return false;
};
export const isInArr2 = (arr: unknown, check: (item: unknown) => boolean): boolean => {
const arr2 = asArr(arr);
const length = arr2.length;
for (let i = 0; i < length; i++) if (check(arr2[i])) return true;
return false;
};
export const fromEntries = (maybeEntries: unknown): Record<string, unknown> => {
const entries = asArr(maybeEntries);
const result: Record<string, unknown> = {};
for (const maybeEntry of entries) {
const entry = asArr(maybeEntry);
const [key, value] = asArr(entry);
Iif (entry.length !== 2) throw new Error('NOT_PAIR');
result[str(key)] = value;
}
return result;
};
export const indexOf = (container: unknown, item: unknown): -1 | number => {
const arr = asArr(container);
const length = arr.length;
for (let i = 0; i < length; i++) if (deepEqual(arr[i], item)) return i;
return -1;
};
export const indexOf2 = (container: unknown, check: (item: unknown) => boolean): -1 | number => {
const arr = asArr(container);
const length = arr.length;
for (let i = 0; i < length; i++) if (check(arr[i])) return i;
return -1;
};
export const zip = (maybeArr1: unknown, maybeArr2: unknown): [unknown, unknown][] => {
const arr1 = asArr(maybeArr1);
const arr2 = asArr(maybeArr2);
const length = Math.min(arr1.length, arr2.length);
const result: [unknown, unknown][] = [];
for (let i = 0; i < length; i++) result.push([arr1[i], arr2[i]]);
return result;
};
export const filter = (arr: unknown[], varname: string, vars: Vars, run: () => unknown): unknown => {
const result = arr.filter((item) => {
vars.set(varname, item);
return run();
});
vars.del(varname);
return result;
};
export const map = (arr: unknown[], varname: string, vars: Vars, run: () => unknown): unknown => {
const result = arr.map((item) => {
vars.set(varname, item);
return run();
});
vars.del(varname);
return result;
};
export const reduce = (
arr: unknown[],
initialValue: unknown,
accname: string,
varname: string,
vars: Vars,
run: () => unknown,
): unknown => {
vars.set(accname, initialValue);
for (const item of arr) {
vars.set(varname, item);
const res = run();
vars.set(accname, res);
}
const result = vars.get(accname);
vars.del(accname);
vars.del(varname);
return result;
};
// ---------------------------------------------------- Object operator helpers
export const asObj = (value: unknown): object => {
if (type(value) === 'object') return value as object;
throw new Error('NOT_OBJECT');
};
export const keys = (value: unknown): string[] => Object.keys(asObj(value));
export const values = (value: unknown): unknown[] => {
const values: unknown[] = [];
const theKeys = keys(value);
const length = theKeys.length;
for (let i = 0; i < length; i++) values.push((value as any)[theKeys[i]]);
return values;
};
export const entries = (value: unknown): [key: string, value: unknown][] => {
const entries: [key: string, value: unknown][] = [];
const theKeys = keys(value);
const length = theKeys.length;
for (let i = 0; i < length; i++) {
const key = theKeys[i];
entries.push([key, (value as any)[key]]);
}
return entries;
};
export const objSetRaw = (obj: Record<string, unknown>, key: string, value: unknown): Record<string, unknown> => {
const prop = str(key);
if (prop === '__proto__') throw new Error('PROTO_KEY');
obj[prop] = value;
return obj;
};
export const objDelRaw = (obj: Record<string, unknown>, key: string): Record<string, unknown> => {
delete obj[key];
return obj;
};
// -------------------------------------------------------------------- Various
export const isLiteral = (value: unknown): boolean => {
if (value instanceof Array) return value.length === 1;
else return true;
};
export const asLiteral = <T>(value: Literal<T>): T => {
Iif (value instanceof Array) {
Iif (value.length !== 1) throw new Error('Invalid literal.');
return value[0];
} else return value;
};
export const literal = <T = unknown>(value: T): T | [T] => (value instanceof Array ? [value] : value);
export const assertFixedArity = (operator: string, arity: number, expr: Expression): void => {
if (expr.length !== arity + 1) throw new Error(`"${operator}" operator expects ${arity} operands.`);
};
export const assertVariadicArity = (operator: string, expr: Expression): void => {
if (expr.length < 3) throw new Error(`"${operator}" operator expects at least two operands.`);
};
export const assertArity = (operator: string, arity: number | [min: number, max: number], expr: Expression): void => {
Iif (!arity) return;
if (arity instanceof Array) {
const [min, max] = arity;
Iif (expr.length < min + 1) throw new Error(`"${operator}" operator expects at least ${min} operands.`);
if (max !== -1 && expr.length > max + 1) throw new Error(`"${operator}" operator expects at most ${max} operands.`);
} else if (arity !== -1) assertFixedArity(operator, arity, expr);
else assertVariadicArity(operator, expr);
};
export const operatorsToMap = (operators: OperatorDefinition<Expression>[]): OperatorMap => {
const map: OperatorMap = new Map();
for (const operator of operators) {
const [name, aliases] = operator;
map.set(name, operator);
for (const alias of aliases) map.set(alias, operator);
}
return map;
};
export const parseVar = (name: string): [name: string, pointer: string] => {
if (name[0] === '/') return ['', name];
const slashIndex = name.indexOf('/');
if (slashIndex === -1) return [name, ''];
return [name.slice(0, slashIndex), name.slice(slashIndex)];
};
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