@gleif-it/did-webs-ts/dist/esm/utils/cesr/parseKeyEventStream.js

did-webs typescript library

import { EventSchema } from '../../core/Event.js';
const isValidEvent = (obj) => EventSchema.safeParse(obj).success;
const extractNextEventBlock = (str, startIndex) => {
    const firstBrace = str.indexOf('{', startIndex);
    if (firstBrace === -1)
        return null;
    const traverse = (index, braceCount, inString, escape) => {
        if (index >= str.length)
            return index;
        const char = str[index];
        return inString
            ? escape
                ? traverse(index + 1, braceCount, inString, false)
                : char === '\\'
                    ? traverse(index + 1, braceCount, inString, true)
                    : char === '"'
                        ? traverse(index + 1, braceCount, false, false)
                        : traverse(index + 1, braceCount, inString, false)
            : char === '"'
                ? traverse(index + 1, braceCount, true, false)
                : char === '{'
                    ? traverse(index + 1, braceCount + 1, inString, false)
                    : char === '}'
                        ? braceCount - 1 === 0
                            ? index
                            : traverse(index + 1, braceCount - 1, inString, false)
                        : traverse(index + 1, braceCount, inString, false);
    };
    const endIndex = traverse(firstBrace, 0, false, false);
    const block = str.substring(firstBrace, endIndex + 1);
    return { block, nextIndex: endIndex + 1 };
};
const getEventBlocks = (str, startIndex = 0) => {
    const blockInfo = extractNextEventBlock(str, startIndex);
    return !blockInfo
        ? []
        : [blockInfo.block, ...getEventBlocks(str, blockInfo.nextIndex)];
};
// custom print function for events in a list
export const _fancyPrintEvents = (events, depth = 0) => {
    const indent = (level) => ' '.repeat(level * 2);
    const printObject = (obj, currentDepth) => {
        if (obj === null || typeof obj !== 'object') {
            return String(obj);
        }
        if (Array.isArray(obj)) {
            return ('[\n' +
                obj
                    .map((item) => indent(currentDepth + 1) + printObject(item, currentDepth + 1))
                    .join(',\n') +
                '\n' +
                indent(currentDepth) +
                ']');
        }
        const entries = Object.entries(obj);
        return ('{\n' +
            entries
                .map(([key, value]) => indent(currentDepth + 1) +
                key +
                ': ' +
                printObject(value, currentDepth + 1))
                .join(',\n') +
            '\n' +
            indent(currentDepth) +
            '}');
    };
    console.log(printObject(events, depth));
};
export const parseKeyEventStream = (cesr) => getEventBlocks(cesr)
    .map((block) => {
    try {
        return JSON.parse(block);
    }
    catch (error) {
        console.error('Error parsing JSON:', error);
        return null;
    }
})
    .filter((event) => event !== null && isValidEvent(event));