xnv/src/server/backend/index.js

const { loadNotesInDirectory, saveNoteInDirectory } = require("./notes");
const { loadTags, updateTagsForNote } = require("./tags");
const { defaultSettings } = require("./settings");

function newNoteBackend(initSettings) {
    let settings = { ...defaultSettings, ...initSettings };

    async function onNoteCommand({ type, payload }) {
        console.log(`got command: ${type} -n ${JSON.stringify(payload)}`);
        const { directory } = settings;
        switch (type) {
            case "getNotes":
                const files = await loadNotesInDirectory(directory);
                const loadedTags = await loadTags(directory);
                return {
                    type: "getNotes",
                    payload: {
                        notes: files.map(f => ({
                            ...f,
                            tags: loadedTags[f.title]
                        }))
                    }
                };
            case "saveNote":
                const { title, content, tags } = payload;
                const result = await saveNoteInDirectory(settings, {
                    title,
                    content,
                    tags
                });
                await updateTagsForNote(directory, { title, tags });
                return { type: "saveNote", payload: { ...result, tags } };
            case "getSettings":
                return { type: "getSettings", payload: { settings } };
            case "saveSettings":
            default:
                return { type: "noop" };
        }
    }

    function updateSettings({ directory }) {
        settings.directory = directory;
    }

    return {
        onNoteCommand,
        updateSettings
    };
}

module.exports = { createBackend: newNoteBackend };