Function extractBalancedJSONContainer

apps/json-format/json-auto-utils.js:344–394

(source)

    }

    function extractBalancedJSONContainer(source) {
        source = String(source || '');
        const start = source.search(/[\{\[]/);
        if (start < 0) return '';

        const stack = [];
        let quote = '';
        let escaped = false;

        for (let i = start; i < source.length; i++) {
            const char = source[i];

            if (quote) {
                if (escaped) {
                    escaped = false;
                    continue;
                }
                if (char === '\\') {
                    escaped = true;
                    continue;
                }
                if (char === quote) {
                    quote = '';
                }
                continue;
            }

            if (char === '"' || char === "'") {
                quote = char;
                continue;
            }

            if (char === '{' || char === '[') {
                stack.push(char);
                continue;
            }

            if (char === '}' || char === ']') {
                const expected = char === '}' ? '{' : '[';
                if (stack[stack.length - 1] !== expected) {
                    return '';
                }
                stack.pop();
                if (!stack.length) {
                    return source.slice(start, i + 1).trim();
                }
            }
        }

        return '';
    }

    function buildJSONLikeCandidates(source, options) {
        options = options || {};