jinaga/dist/http/serializer.js

Data management for web and mobile applications.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.serializeGraph = exports.GraphSerializer = void 0;
class GraphSerializer {
    constructor(write) {
        this.write = write;
        this.index = 0;
        this.indexByFactReference = {};
        this.publicKeys = [];
    }
    serialize(result) {
        // Write the facts
        for (const fact of result) {
            // Skip facts that have already been written
            const key = fact.fact.type + ":" + fact.fact.hash;
            if (this.indexByFactReference.hasOwnProperty(key)) {
                continue;
            }
            // Write any new public keys
            for (const signature of fact.signatures) {
                if (!this.publicKeys.includes(signature.publicKey)) {
                    const pkIndex = this.publicKeys.length;
                    const publicKey = JSON.stringify(signature.publicKey);
                    this.write(`PK${pkIndex.toString()}\n${publicKey}\n\n`);
                    this.publicKeys.push(signature.publicKey);
                }
            }
            // Write the fact
            const factType = JSON.stringify(fact.fact.type);
            const predecessorIndexes = JSON.stringify(this.getPredecessorIndexes(fact.fact.predecessors));
            const factFields = JSON.stringify(fact.fact.fields);
            let output = `${factType}\n${predecessorIndexes}\n${factFields}`;
            // Write the signatures
            for (const signature of fact.signatures) {
                const publicKeyIndex = this.publicKeys.indexOf(signature.publicKey);
                const publicKey = `PK${publicKeyIndex.toString()}`;
                const signatureString = JSON.stringify(signature.signature);
                output += `\n${publicKey}\n${signatureString}`;
            }
            output += "\n\n";
            this.write(output);
            this.indexByFactReference[key] = this.index;
            this.index++;
        }
    }
    getPredecessorIndexes(predecessors) {
        const result = {};
        for (const role in predecessors) {
            const reference = predecessors[role];
            if (Array.isArray(reference)) {
                result[role] = reference.map(r => this.getFactIndex(r));
            }
            else {
                result[role] = this.getFactIndex(reference);
            }
        }
        return result;
    }
    getFactIndex(reference) {
        const key = reference.type + ":" + reference.hash;
        if (!this.indexByFactReference.hasOwnProperty(key)) {
            throw new Error(`Fact reference not found in graph: ${key}`);
        }
        return this.indexByFactReference[key];
    }
}
exports.GraphSerializer = GraphSerializer;
function serializeGraph(graph) {
    const serializedData = [];
    const serializer = new GraphSerializer(chunk => serializedData.push(chunk));
    serializer.serialize(graph);
    const body = serializedData.join('');
    return body;
}
exports.serializeGraph = serializeGraph;
//# sourceMappingURL=serializer.js.map