@slickteam/nestjs-warp10/dist/utils/JsonLib.js

Module for Warp10 with Nestjs

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.JsonLib = void 0;
class JsonLib {
    at;
    ch;
    escapee = {
        '"': '"',
        '\\': '\\',
        '/': '/',
        b: '\b',
        f: '\f',
        n: '\n',
        r: '\r',
        t: '\t',
    };
    text;
    error(m) {
        throw {
            name: 'SyntaxError',
            message: m,
            at: this.at,
            text: this.text,
        };
    }
    next() {
        return (this.ch = this.text.charAt(this.at++));
    }
    check(c) {
        if (c !== this.ch) {
            this.error(`Expected '${c}' instead of '${this.ch}'`);
        }
        this.ch = this.text.charAt(this.at++);
    }
    parseNumber() {
        let str = '';
        if (this.ch === '-') {
            str = '-';
            this.check('-');
        }
        if (this.ch === 'I') {
            this.check('I');
            this.check('n');
            this.check('f');
            this.check('i');
            this.check('n');
            this.check('i');
            this.check('t');
            this.check('y');
            return -Infinity;
        }
        while (this.ch >= '0' && this.ch <= '9') {
            str += this.ch;
            this.next();
        }
        if (this.ch === '.') {
            str += '.';
            while (this.next() && this.ch >= '0' && this.ch <= '9') {
                str += this.ch;
            }
        }
        if (this.ch === 'e' || this.ch === 'E') {
            str += this.ch;
            this.next();
            if (this.ch === '-' || this.ch === '+') {
                str += this.ch;
                this.next();
            }
            while (this.ch >= '0' && this.ch <= '9') {
                str += this.ch;
                this.next();
            }
        }
        return +str;
    }
    parseString() {
        let hex;
        let str = '';
        let uffff;
        if (this.ch === '"') {
            while (this.next()) {
                if (this.ch === '"') {
                    this.next();
                    return str;
                }
                if (this.ch === '\\') {
                    this.next();
                    if (this.ch === 'u') {
                        uffff = 0;
                        for (let i = 0; i < 4; i++) {
                            hex = parseInt(this.next(), 16);
                            if (!isFinite(hex)) {
                                break;
                            }
                            uffff = uffff * 16 + hex;
                        }
                        str += String.fromCharCode(uffff);
                    }
                    else if (this.escapee[this.ch]) {
                        str += this.escapee[this.ch];
                    }
                    else {
                        break;
                    }
                }
                else {
                    str += this.ch;
                }
            }
        }
        this.error('Bad string');
    }
    white() {
        while (this.ch && this.ch <= ' ') {
            this.next();
        }
    }
    word() {
        switch (this.ch) {
            case 't':
                this.check('t');
                this.check('r');
                this.check('u');
                this.check('e');
                return true;
            case 'f':
                this.check('f');
                this.check('a');
                this.check('l');
                this.check('s');
                this.check('e');
                return false;
            case 'n':
                this.check('n');
                this.check('u');
                this.check('l');
                this.check('l');
                return null;
            case 'N':
                this.check('N');
                this.check('a');
                this.check('N');
                return NaN;
            case 'I':
                this.check('I');
                this.check('n');
                this.check('f');
                this.check('i');
                this.check('n');
                this.check('i');
                this.check('t');
                this.check('y');
                return Infinity;
        }
        this.error(`Unexpected '${this.ch}'`);
    }
    array() {
        const array = [];
        if (this.ch === '[') {
            this.check('[');
            this.white();
            if (this.ch === ']') {
                this.check(']');
                return array;
            }
            while (this.ch !== undefined) {
                array.push(this.value());
                this.white();
                if (this.ch === ']') {
                    this.check(']');
                    return array;
                }
                this.check(',');
                this.white();
            }
        }
        this.error('Bad array');
    }
    object() {
        let key;
        const object = {};
        if (this.ch === '{') {
            this.check('{');
            this.white();
            if (this.ch === '}') {
                this.check('}');
                return object;
            }
            while (this.ch) {
                key = this.parseString() ?? '';
                this.white();
                this.check(':');
                if (Object.hasOwnProperty.call(object, key)) {
                    this.error(`Duplicate key '${key}'`);
                }
                object[key] = this.value();
                this.white();
                if (this.ch === '}') {
                    this.check('}');
                    return object;
                }
                this.check(',');
                this.white();
            }
        }
        this.error('Bad object');
    }
    value() {
        this.white();
        switch (this.ch) {
            case '{':
                return this.object();
            case '[':
                return this.array();
            case '"':
                return this.parseString();
            case '-':
                return this.parseNumber();
            default:
                return this.ch >= '0' && this.ch <= '9' ? this.parseNumber() : this.word();
        }
    }
    parse(source, reviver) {
        this.text = source;
        this.at = 0;
        this.ch = ' ';
        const result = this.value();
        this.white();
        if (this.ch) {
            this.error('Syntax error');
        }
        return typeof reviver === 'function'
            ? (function walk(holder, key) {
                let k;
                let v;
                const value = holder[key];
                if (value !== undefined && typeof value === 'object') {
                    for (k in value) {
                        if (Object.prototype.hasOwnProperty.call(value, k)) {
                            v = walk(value, k);
                            if (v !== undefined) {
                                value[k] = v;
                            }
                            else {
                                delete value[k];
                            }
                        }
                    }
                }
                return reviver.call(holder, key, value);
            })({ '': result }, '')
            : result;
    }
}
exports.JsonLib = JsonLib;
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