@fedify/fedify/esm/nodeinfo/types.js

An ActivityPub server framework

import { format } from "../deps/jsr.io/@std/semver/1.0.4/mod.js";
/**
 * Converts a {@link NodeInfo} object to a JSON value.
 * @param nodeInfo The {@link NodeInfo} object to convert.
 * @returns The JSON value that complies with the NodeInfo schema.
 * @throws {TypeError} If the {@link NodeInfo} object is invalid.
 */
export function nodeInfoToJson(nodeInfo) {
    if (!nodeInfo.software.name.match(/^[a-z0-9-]+$/)) {
        throw new TypeError("Invalid software name.");
    }
    if (nodeInfo.protocols.length < 1) {
        throw new TypeError("At least one protocol must be supported.");
    }
    if (nodeInfo.usage.users.total != null &&
        (nodeInfo.usage.users.total < 0 ||
            !Number.isInteger(nodeInfo.usage.users.total))) {
        throw new TypeError("Invalid total users.");
    }
    if (nodeInfo.usage.users.activeHalfyear != null &&
        (nodeInfo.usage.users.activeHalfyear < 0 ||
            !Number.isInteger(nodeInfo.usage.users.activeHalfyear))) {
        throw new TypeError("Invalid active halfyear users.");
    }
    if (nodeInfo.usage.users.activeMonth != null &&
        (nodeInfo.usage.users.activeMonth < 0 ||
            !Number.isInteger(nodeInfo.usage.users.activeMonth))) {
        throw new TypeError("Invalid active month users.");
    }
    if (nodeInfo.usage.localPosts < 0 ||
        !Number.isInteger(nodeInfo.usage.localPosts)) {
        throw new TypeError("Invalid local posts.");
    }
    if (nodeInfo.usage.localComments < 0 ||
        !Number.isInteger(nodeInfo.usage.localComments)) {
        throw new TypeError("Invalid local comments.");
    }
    return {
        "$schema": "http://nodeinfo.diaspora.software/ns/schema/2.1#",
        version: "2.1",
        software: {
            name: nodeInfo.software.name,
            version: format(nodeInfo.software.version),
            repository: nodeInfo.software.repository?.href,
            homepage: nodeInfo.software.homepage?.href,
        },
        protocols: nodeInfo.protocols,
        services: nodeInfo.services == null ? { inbound: [], outbound: [] } : {
            inbound: nodeInfo.services.inbound ?? [],
            outbound: nodeInfo.services.outbound ?? [],
        },
        openRegistrations: nodeInfo.openRegistrations ?? false,
        usage: {
            users: nodeInfo.usage.users,
            localPosts: nodeInfo.usage.localPosts,
            localComments: nodeInfo.usage.localComments,
        },
        metadata: nodeInfo.metadata ?? {},
    };
}