@braindb/core/dist/toJson.js

markdown-graph-content-layer-database

import { eq, isNotNull, sql } from "drizzle-orm";
import { document, link } from "./schema.js";
import { alias } from "drizzle-orm/sqlite-core";
const documentFrom = alias(document, "documentFrom");
const documentTo = alias(document, "documentTo");
// https://graphology.github.io/serialization.html#format
export function toGraphology(db) {
    const edges = db
        .select({
        source: documentFrom.id,
        target: documentTo.id,
        // key: link.id,
        // attributes: { label: link.label },
    })
        .from(link)
        .innerJoin(documentFrom, eq(link.from, documentFrom.path))
        .innerJoin(documentTo, eq(link.to, documentTo.path))
        // need to show broken links on the graph
        .where(isNotNull(link.to))
        .all();
    const nodes = db
        .select({
        key: document.id,
        attributes: {
            label: sql `json_extract(${document.frontmatter}, '$.title')`,
            url: document.url,
        },
    })
        .from(document)
        .all();
    return {
        attributes: { name: "g" },
        options: {
            allowSelfLoops: true,
            multi: true,
            type: "directed",
        },
        nodes,
        edges,
    };
}