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529 lines
17 KiB
529 lines
17 KiB
const typeChecker = (type) => {
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const typeString = "[object " + type + "]";
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return function (value) {
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return getClassName(value) === typeString;
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};
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};
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const getClassName = value => Object.prototype.toString.call(value);
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const comparable = (value) => {
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if (value instanceof Date) {
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return value.getTime();
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}
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else if (isArray(value)) {
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return value.map(comparable);
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}
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else if (value && typeof value.toJSON === "function") {
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return value.toJSON();
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}
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return value;
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};
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const isArray = typeChecker("Array");
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const isObject = typeChecker("Object");
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const isFunction = typeChecker("Function");
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const isVanillaObject = value => {
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return (value &&
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(value.constructor === Object ||
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value.constructor === Array ||
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value.constructor.toString() === "function Object() { [native code] }" ||
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value.constructor.toString() === "function Array() { [native code] }") &&
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!value.toJSON);
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};
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const equals = (a, b) => {
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if (a == null && a == b) {
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return true;
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}
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if (a === b) {
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return true;
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}
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if (Object.prototype.toString.call(a) !== Object.prototype.toString.call(b)) {
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return false;
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}
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if (isArray(a)) {
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if (a.length !== b.length) {
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return false;
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}
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for (let i = 0, { length } = a; i < length; i++) {
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if (!equals(a[i], b[i]))
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return false;
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}
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return true;
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}
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else if (isObject(a)) {
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if (Object.keys(a).length !== Object.keys(b).length) {
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return false;
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}
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for (const key in a) {
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if (!equals(a[key], b[key]))
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return false;
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}
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return true;
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}
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return false;
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};
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/**
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* Walks through each value given the context - used for nested operations. E.g:
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* { "person.address": { $eq: "blarg" }}
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*/
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const walkKeyPathValues = (item, keyPath, next, depth, key, owner) => {
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const currentKey = keyPath[depth];
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// if array, then try matching. Might fall through for cases like:
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// { $eq: [1, 2, 3] }, [ 1, 2, 3 ].
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if (isArray(item) && isNaN(Number(currentKey))) {
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for (let i = 0, { length } = item; i < length; i++) {
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// if FALSE is returned, then terminate walker. For operations, this simply
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// means that the search critera was met.
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if (!walkKeyPathValues(item[i], keyPath, next, depth, i, item)) {
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return false;
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}
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}
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}
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if (depth === keyPath.length || item == null) {
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return next(item, key, owner);
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}
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return walkKeyPathValues(item[currentKey], keyPath, next, depth + 1, currentKey, item);
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};
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class BaseOperation {
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constructor(params, owneryQuery, options) {
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this.params = params;
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this.owneryQuery = owneryQuery;
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this.options = options;
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this.init();
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}
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init() { }
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reset() {
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this.done = false;
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this.keep = false;
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}
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}
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class NamedBaseOperation extends BaseOperation {
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constructor(params, owneryQuery, options, name) {
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super(params, owneryQuery, options);
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this.name = name;
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}
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}
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class GroupOperation extends BaseOperation {
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constructor(params, owneryQuery, options, children) {
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super(params, owneryQuery, options);
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this.children = children;
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}
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/**
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*/
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reset() {
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this.keep = false;
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this.done = false;
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for (let i = 0, { length } = this.children; i < length; i++) {
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this.children[i].reset();
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}
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}
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/**
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*/
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childrenNext(item, key, owner) {
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let done = true;
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let keep = true;
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for (let i = 0, { length } = this.children; i < length; i++) {
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const childOperation = this.children[i];
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childOperation.next(item, key, owner);
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if (!childOperation.keep) {
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keep = false;
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}
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if (childOperation.done) {
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if (!childOperation.keep) {
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break;
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}
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}
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else {
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done = false;
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}
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}
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this.done = done;
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this.keep = keep;
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}
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}
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class NamedGroupOperation extends GroupOperation {
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constructor(params, owneryQuery, options, children, name) {
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super(params, owneryQuery, options, children);
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this.name = name;
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}
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}
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class QueryOperation extends GroupOperation {
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/**
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*/
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next(item, key, parent) {
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this.childrenNext(item, key, parent);
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}
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}
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class NestedOperation extends GroupOperation {
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constructor(keyPath, params, owneryQuery, options, children) {
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super(params, owneryQuery, options, children);
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this.keyPath = keyPath;
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/**
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*/
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this._nextNestedValue = (value, key, owner) => {
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this.childrenNext(value, key, owner);
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return !this.done;
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};
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}
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/**
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*/
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next(item, key, parent) {
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walkKeyPathValues(item, this.keyPath, this._nextNestedValue, 0, key, parent);
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}
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}
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const createTester = (a, compare) => {
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if (a instanceof Function) {
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return a;
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}
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if (a instanceof RegExp) {
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return b => {
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const result = typeof b === "string" && a.test(b);
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a.lastIndex = 0;
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return result;
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};
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}
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const comparableA = comparable(a);
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return b => compare(comparableA, comparable(b));
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};
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class EqualsOperation extends BaseOperation {
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init() {
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this._test = createTester(this.params, this.options.compare);
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}
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next(item, key, parent) {
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if (!Array.isArray(parent) || parent.hasOwnProperty(key)) {
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if (this._test(item, key, parent)) {
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this.done = true;
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this.keep = true;
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}
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}
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}
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}
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const createEqualsOperation = (params, owneryQuery, options) => new EqualsOperation(params, owneryQuery, options);
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class NopeOperation extends BaseOperation {
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next() {
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this.done = true;
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this.keep = false;
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}
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}
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const numericalOperationCreator = (createNumericalOperation) => (params, owneryQuery, options, name) => {
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if (params == null) {
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return new NopeOperation(params, owneryQuery, options);
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}
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return createNumericalOperation(params, owneryQuery, options, name);
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};
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const numericalOperation = (createTester) => numericalOperationCreator((params, owneryQuery, options) => {
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const typeofParams = typeof comparable(params);
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const test = createTester(params);
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return new EqualsOperation(b => {
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return typeof comparable(b) === typeofParams && test(b);
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}, owneryQuery, options);
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});
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const createNamedOperation = (name, params, parentQuery, options) => {
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const operationCreator = options.operations[name];
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if (!operationCreator) {
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throw new Error(`Unsupported operation: ${name}`);
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}
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return operationCreator(params, parentQuery, options, name);
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};
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const containsOperation = (query) => {
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for (const key in query) {
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if (key.charAt(0) === "$")
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return true;
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}
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return false;
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};
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const createNestedOperation = (keyPath, nestedQuery, owneryQuery, options) => {
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if (containsOperation(nestedQuery)) {
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const [selfOperations, nestedOperations] = createQueryOperations(nestedQuery, options);
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if (nestedOperations.length) {
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throw new Error(`Property queries must contain only operations, or exact objects.`);
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}
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return new NestedOperation(keyPath, nestedQuery, owneryQuery, options, selfOperations);
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}
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return new NestedOperation(keyPath, nestedQuery, owneryQuery, options, [
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new EqualsOperation(nestedQuery, owneryQuery, options)
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]);
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};
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const createQueryOperation = (query, owneryQuery = null, { compare, operations } = {}) => {
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const options = {
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compare: compare || equals,
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operations: Object.assign({}, operations || {})
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};
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const [selfOperations, nestedOperations] = createQueryOperations(query, options);
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const ops = [];
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if (selfOperations.length) {
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ops.push(new NestedOperation([], query, owneryQuery, options, selfOperations));
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}
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ops.push(...nestedOperations);
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if (ops.length === 1) {
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return ops[0];
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}
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return new QueryOperation(query, owneryQuery, options, ops);
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};
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const createQueryOperations = (query, options) => {
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const selfOperations = [];
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const nestedOperations = [];
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if (!isVanillaObject(query)) {
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selfOperations.push(new EqualsOperation(query, query, options));
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return [selfOperations, nestedOperations];
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}
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for (const key in query) {
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if (key.charAt(0) === "$") {
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const op = createNamedOperation(key, query[key], query, options);
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// probably just a flag for another operation (like $options)
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if (op != null) {
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selfOperations.push(op);
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}
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}
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else {
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nestedOperations.push(createNestedOperation(key.split("."), query[key], query, options));
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}
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}
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return [selfOperations, nestedOperations];
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};
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const createOperationTester = (operation) => (item, key, owner) => {
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operation.reset();
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operation.next(item, key, owner);
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return operation.keep;
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};
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const createQueryTester = (query, options = {}) => {
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return createOperationTester(createQueryOperation(query, null, options));
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};
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class $Ne extends NamedBaseOperation {
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init() {
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this._test = createTester(this.params, this.options.compare);
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}
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reset() {
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super.reset();
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this.keep = true;
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}
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next(item) {
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if (this._test(item)) {
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this.done = true;
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this.keep = false;
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}
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}
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}
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// https://docs.mongodb.com/manual/reference/operator/query/elemMatch/
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class $ElemMatch extends NamedBaseOperation {
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init() {
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this._queryOperation = createQueryOperation(this.params, this.owneryQuery, this.options);
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}
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reset() {
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super.reset();
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this._queryOperation.reset();
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}
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next(item) {
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if (isArray(item)) {
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for (let i = 0, { length } = item; i < length; i++) {
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// reset query operation since item being tested needs to pass _all_ query
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// operations for it to be a success
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this._queryOperation.reset();
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// check item
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this._queryOperation.next(item[i], i, item);
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this.keep = this.keep || this._queryOperation.keep;
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}
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this.done = true;
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}
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else {
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this.done = false;
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this.keep = false;
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}
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}
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}
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class $Not extends NamedBaseOperation {
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init() {
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this._queryOperation = createQueryOperation(this.params, this.owneryQuery, this.options);
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}
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reset() {
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this._queryOperation.reset();
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}
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next(item, key, owner) {
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this._queryOperation.next(item, key, owner);
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this.done = this._queryOperation.done;
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this.keep = !this._queryOperation.keep;
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}
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}
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class $Size extends NamedBaseOperation {
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init() { }
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next(item) {
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if (isArray(item) && item.length === this.params) {
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this.done = true;
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this.keep = true;
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}
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// if (parent && parent.length === this.params) {
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// this.done = true;
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// this.keep = true;
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// }
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}
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}
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class $Or extends NamedBaseOperation {
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init() {
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this._ops = this.params.map(op => createQueryOperation(op, null, this.options));
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}
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reset() {
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this.done = false;
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this.keep = false;
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for (let i = 0, { length } = this._ops; i < length; i++) {
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this._ops[i].reset();
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}
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}
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next(item, key, owner) {
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let done = false;
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let success = false;
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for (let i = 0, { length } = this._ops; i < length; i++) {
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const op = this._ops[i];
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op.next(item, key, owner);
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if (op.keep) {
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done = true;
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success = op.keep;
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break;
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}
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}
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this.keep = success;
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this.done = done;
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}
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}
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class $Nor extends $Or {
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next(item, key, owner) {
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super.next(item, key, owner);
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this.keep = !this.keep;
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}
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}
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class $In extends NamedBaseOperation {
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init() {
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this._testers = this.params.map(value => {
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if (containsOperation(value)) {
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throw new Error(`cannot nest $ under ${this.constructor.name.toLowerCase()}`);
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}
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return createTester(value, this.options.compare);
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});
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}
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next(item, key, owner) {
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let done = false;
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let success = false;
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for (let i = 0, { length } = this._testers; i < length; i++) {
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const test = this._testers[i];
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if (test(item)) {
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done = true;
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success = true;
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break;
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}
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}
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this.keep = success;
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this.done = done;
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}
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}
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class $Nin extends $In {
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next(item, key, owner) {
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super.next(item, key, owner);
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this.keep = !this.keep;
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}
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}
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class $Exists extends NamedBaseOperation {
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next(item, key, owner) {
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if (owner.hasOwnProperty(key) === this.params) {
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this.done = true;
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this.keep = true;
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}
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}
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}
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class $And extends NamedGroupOperation {
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constructor(params, owneryQuery, options, name) {
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super(params, owneryQuery, options, params.map(query => createQueryOperation(query, owneryQuery, options)), name);
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}
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next(item, key, owner) {
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this.childrenNext(item, key, owner);
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}
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}
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const $eq = (params, owneryQuery, options) => new EqualsOperation(params, owneryQuery, options);
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const $ne = (params, owneryQuery, options, name) => new $Ne(params, owneryQuery, options, name);
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const $or = (params, owneryQuery, options, name) => new $Or(params, owneryQuery, options, name);
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const $nor = (params, owneryQuery, options, name) => new $Nor(params, owneryQuery, options, name);
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const $elemMatch = (params, owneryQuery, options, name) => new $ElemMatch(params, owneryQuery, options, name);
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const $nin = (params, owneryQuery, options, name) => new $Nin(params, owneryQuery, options, name);
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const $in = (params, owneryQuery, options, name) => new $In(params, owneryQuery, options, name);
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const $lt = numericalOperation(params => b => b < params);
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const $lte = numericalOperation(params => b => b <= params);
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const $gt = numericalOperation(params => b => b > params);
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const $gte = numericalOperation(params => b => b >= params);
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const $mod = ([mod, equalsValue], owneryQuery, options) => new EqualsOperation(b => comparable(b) % mod === equalsValue, owneryQuery, options);
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const $exists = (params, owneryQuery, options, name) => new $Exists(params, owneryQuery, options, name);
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const $regex = (pattern, owneryQuery, options) => new EqualsOperation(new RegExp(pattern, owneryQuery.$options), owneryQuery, options);
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const $not = (params, owneryQuery, options, name) => new $Not(params, owneryQuery, options, name);
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const typeAliases = {
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number: v => typeof v === "number",
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|
string: v => typeof v === "string",
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bool: v => typeof v === "boolean",
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array: v => Array.isArray(v),
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null: v => v === null,
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timestamp: v => v instanceof Date
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};
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const $type = (clazz, owneryQuery, options) => new EqualsOperation(b => {
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|
if (typeof clazz === "string") {
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|
if (!typeAliases[clazz]) {
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throw new Error(`Type alias does not exist`);
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}
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return typeAliases[clazz](b);
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}
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return b != null ? b instanceof clazz || b.constructor === clazz : false;
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}, owneryQuery, options);
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|
const $and = (params, ownerQuery, options, name) => new $And(params, ownerQuery, options, name);
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const $all = $and;
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const $size = (params, ownerQuery, options) => new $Size(params, ownerQuery, options, "$size");
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|
const $options = () => null;
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|
const $where = (params, ownerQuery, options) => {
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|
let test;
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|
if (isFunction(params)) {
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|
test = params;
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}
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|
else if (!process.env.CSP_ENABLED) {
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|
test = new Function("obj", "return " + params);
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}
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|
else {
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|
throw new Error(`In CSP mode, sift does not support strings in "$where" condition`);
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|
}
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|
return new EqualsOperation(b => test.bind(b)(b), ownerQuery, options);
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|
};
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|
var defaultOperations = /*#__PURE__*/Object.freeze({
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|
__proto__: null,
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|
$Size: $Size,
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|
$eq: $eq,
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|
$ne: $ne,
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|
$or: $or,
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$nor: $nor,
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$elemMatch: $elemMatch,
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$nin: $nin,
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$in: $in,
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$lt: $lt,
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$lte: $lte,
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$gt: $gt,
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$gte: $gte,
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$mod: $mod,
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$exists: $exists,
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$regex: $regex,
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$not: $not,
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$type: $type,
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$and: $and,
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$all: $all,
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$size: $size,
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$options: $options,
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$where: $where
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});
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const createDefaultQueryOperation = (query, ownerQuery, { compare, operations } = {}) => {
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return createQueryOperation(query, ownerQuery, {
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compare: compare,
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operations: Object.assign({}, defaultOperations, operations || {})
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});
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};
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const createDefaultQueryTester = (query, options = {}) => {
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const op = createDefaultQueryOperation(query, null, options);
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return createOperationTester(op);
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};
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export default createDefaultQueryTester;
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export { $Size, $all, $and, $elemMatch, $eq, $exists, $gt, $gte, $in, $lt, $lte, $mod, $ne, $nin, $nor, $not, $options, $or, $regex, $size, $type, $where, EqualsOperation, createDefaultQueryOperation, createEqualsOperation, createOperationTester, createQueryOperation, createQueryTester };
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//# sourceMappingURL=index.js.map
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