@neo4j/cypher-builder
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A programmatic API for building Cypher queries for Neo4j
137 lines (136 loc) • 6.84 kB
JavaScript
;
/*
* Copyright (c) "Neo4j"
* Neo4j Sweden AB [http://neo4j.com]
*/
var __esDecorate = (this && this.__esDecorate) || function (ctor, descriptorIn, decorators, contextIn, initializers, extraInitializers) {
function accept(f) { if (f !== void 0 && typeof f !== "function") throw new TypeError("Function expected"); return f; }
var kind = contextIn.kind, key = kind === "getter" ? "get" : kind === "setter" ? "set" : "value";
var target = !descriptorIn && ctor ? contextIn["static"] ? ctor : ctor.prototype : null;
var descriptor = descriptorIn || (target ? Object.getOwnPropertyDescriptor(target, contextIn.name) : {});
var _, done = false;
for (var i = decorators.length - 1; i >= 0; i--) {
var context = {};
for (var p in contextIn) context[p] = p === "access" ? {} : contextIn[p];
for (var p in contextIn.access) context.access[p] = contextIn.access[p];
context.addInitializer = function (f) { if (done) throw new TypeError("Cannot add initializers after decoration has completed"); extraInitializers.push(accept(f || null)); };
var result = (0, decorators[i])(kind === "accessor" ? { get: descriptor.get, set: descriptor.set } : descriptor[key], context);
if (kind === "accessor") {
if (result === void 0) continue;
if (result === null || typeof result !== "object") throw new TypeError("Object expected");
if (_ = accept(result.get)) descriptor.get = _;
if (_ = accept(result.set)) descriptor.set = _;
if (_ = accept(result.init)) initializers.unshift(_);
}
else if (_ = accept(result)) {
if (kind === "field") initializers.unshift(_);
else descriptor[key] = _;
}
}
if (target) Object.defineProperty(target, contextIn.name, descriptor);
done = true;
};
var __runInitializers = (this && this.__runInitializers) || function (thisArg, initializers, value) {
var useValue = arguments.length > 2;
for (var i = 0; i < initializers.length; i++) {
value = useValue ? initializers[i].call(thisArg, value) : initializers[i].call(thisArg);
}
return useValue ? value : void 0;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.NestedPattern = exports.Pattern = void 0;
const Environment_1 = require("../Environment");
const WithWhere_1 = require("../clauses/mixins/sub-clauses/WithWhere");
const mixin_1 = require("../clauses/utils/mixin");
const Variable_1 = require("../references/Variable");
const compile_cypher_if_exists_1 = require("../utils/compile-cypher-if-exists");
const pad_block_1 = require("../utils/pad-block");
const PartialPattern_1 = require("./PartialPattern");
const PathAssign_1 = require("./PathAssign");
const PatternElement_1 = require("./PatternElement");
const labels_to_string_1 = require("./labels-to-string");
const QuantifiedPattern_1 = require("./quantified-patterns/QuantifiedPattern");
/** Represents a pattern of a single node or n-relationships to be used in clauses.
* @see {@link https://neo4j.com/docs/cypher-manual/current/syntax/patterns/ | Cypher Documentation}
* @group Patterns
*/
let Pattern = (() => {
let _classDecorators = [(0, mixin_1.mixin)(WithWhere_1.WithWhere)];
let _classDescriptor;
let _classExtraInitializers = [];
let _classThis;
let _classSuper = PatternElement_1.PatternElement;
var Pattern = class extends _classSuper {
static { _classThis = this; }
static {
const _metadata = typeof Symbol === "function" && Symbol.metadata ? Object.create(_classSuper[Symbol.metadata] ?? null) : void 0;
__esDecorate(null, _classDescriptor = { value: _classThis }, _classDecorators, { kind: "class", name: _classThis.name, metadata: _metadata }, null, _classExtraInitializers);
Pattern = _classThis = _classDescriptor.value;
if (_metadata) Object.defineProperty(_classThis, Symbol.metadata, { enumerable: true, configurable: true, writable: true, value: _metadata });
__runInitializers(_classThis, _classExtraInitializers);
}
properties;
labels;
previous;
constructor(nodeVariable, options = {}) {
const firstArgumentIsVar = nodeVariable instanceof Variable_1.Variable;
const variable = firstArgumentIsVar ? nodeVariable : undefined;
super(variable);
if (!firstArgumentIsVar) {
options = nodeVariable ?? {};
}
this.labels = options.labels;
this.properties = options.properties;
}
related(ref, options) {
if (ref instanceof Variable_1.Variable) {
return new PartialPattern_1.PartialPattern(ref, options ?? {}, this);
}
else {
return new PartialPattern_1.PartialPattern(undefined, options ?? ref ?? {}, this);
}
}
/** Adds a quantifier to the pattern such as `{1,3}`, to be used as part of a {@link QuantifiedPath} */
quantifier(quantifier) {
return new QuantifiedPattern_1.QuantifiedPattern(this, quantifier);
}
assignTo(variable) {
return new PathAssign_1.PathAssign(this, variable);
}
/**
* @internal
*/
getCypher(env) {
const prevStr = this.previous?.getCypher(env) ?? "";
const nodeRefId = this.variable ? `${this.variable.getCypher(env)}` : "";
const propertiesStr = this.properties ? this.serializeParameters(this.properties, env) : "";
const nodeLabelStr = this.getLabelsStr(env);
const whereStr = (0, compile_cypher_if_exists_1.compileCypherIfExists)(this.whereSubClause, env, { prefix: " " });
return `${prevStr}(${nodeRefId}${nodeLabelStr}${propertiesStr}${whereStr})`;
}
getLabelsStr(env) {
if (this.labels) {
return (0, labels_to_string_1.labelsToString)(this.labels, env);
}
return "";
}
};
return Pattern = _classThis;
})();
exports.Pattern = Pattern;
// This exists to support a "previous" parameter without exposing this to the user
class NestedPattern extends Pattern {
constructor(nodeVariable, options = {}, previous) {
// eslint-disable-next-line @typescript-eslint/no-explicit-any, @typescript-eslint/no-unsafe-argument
super(nodeVariable, options);
this.previous = previous;
}
/** Overrides custom string to `Pattern` instead of `NestedPattern`
* @hidden
*/
toString() {
const cypher = (0, pad_block_1.padBlock)(this.getCypher(new Environment_1.CypherEnvironment()));
return `<Pattern> """\n${cypher}\n"""`;
}
}
exports.NestedPattern = NestedPattern;