@xcrap/parser/dist/json/parsing-model.js

Xcrap Parser is a package of the Xcrap framework, it was developed to take care of the data extraction part of text files (currently supporting only HTML and JSON) using declarative models.

"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
      desc = { enumerable: true, get: function() { return m[k]; } };
    }
    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
    var ownKeys = function(o) {
        ownKeys = Object.getOwnPropertyNames || function (o) {
            var ar = [];
            for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
            return ar;
        };
        return ownKeys(o);
    };
    return function (mod) {
        if (mod && mod.__esModule) return mod;
        var result = {};
        if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
        __setModuleDefault(result, mod);
        return result;
    };
})();
Object.defineProperty(exports, "__esModule", { value: true });
exports.JsonParsingModel = void 0;
const jmespath = __importStar(require("jmespath"));
class JsonParsingModel {
    constructor(shape) {
        this.shape = shape;
    }
    async parse(source) {
        const root = JSON.parse(source);
        const data = {};
        for (const key in this.shape) {
            const value = this.shape[key];
            const isNestedValue = "model" in value;
            if (isNestedValue) {
                data[key] = await this.parseNestedValue(value, root);
            }
            else {
                data[key] = this.parseValue(value, root);
            }
        }
        return data;
    }
    parseValue(value, root) {
        const extractedData = jmespath.search(root, value.query);
        if (extractedData === null && value.default !== undefined) {
            return value.default;
        }
        return extractedData;
    }
    async parseNestedValue(value, root) {
        const extractedData = jmespath.search(root, value.query);
        const model = value.model;
        const modelIsJsonParser = model.constructor.name === JsonParsingModel.name;
        if (extractedData === null && value.default !== undefined) {
            return value.default;
        }
        if (value.multiple) {
            if (!Array.isArray(extractedData)) {
                throw new Error(`Expected an array for multiple values, but got ${typeof extractedData}`);
            }
            if (value.limit !== undefined) {
                extractedData.splice(value.limit);
            }
            if (!modelIsJsonParser) {
                if (extractedData.some(item => typeof item !== "string")) {
                    throw new Error(`Expected an array of strings for model parsing, but got ${typeof extractedData[0]}`);
                }
                return await Promise.all(extractedData.map(item => model.parse(JSON.stringify(item))));
            }
        }
        else {
            if (!modelIsJsonParser && typeof extractedData !== "string") {
                throw new Error(`Expected a string for model parsing, but got ${typeof extractedData}`);
            }
            if (!modelIsJsonParser) {
                return await model.parse(extractedData);
            }
            return await model.parse(JSON.stringify(extractedData));
        }
        return extractedData;
    }
}
exports.JsonParsingModel = JsonParsingModel;