@orbitdb/set-db/dist/set.js

Set database type for orbit-db.

import { Database } from "@orbitdb/core";
const type = "set";
const SetDb = () => async ({ ipfs, identity, address, name, access, directory, meta, headsStorage, entryStorage, indexStorage, referencesCount, syncAutomatically, onUpdate, }) => {
    const database = await Database({
        ipfs,
        identity,
        address,
        name,
        access,
        directory,
        meta,
        headsStorage,
        entryStorage,
        indexStorage,
        referencesCount,
        syncAutomatically,
        onUpdate,
    });
    const { add, del, iterator, all } = SetApi({ database });
    return {
        ...database,
        type,
        add,
        del,
        iterator,
        all,
    };
};
SetDb.type = type;
export const SetApi = ({ database }) => {
    const add = async (value) => {
        // TODO: check if value already exists? (Optimises memory over speed)
        return database.addOperation({ op: "ADD", key: null, value });
    };
    const del = async (value) => {
        return database.addOperation({ op: "DEL", key: null, value });
    };
    const iterator = async function* ({ amount, } = {}) {
        const vals = {};
        let count = 0;
        for await (const entry of database.log.traverse()) {
            const { op, value } = entry.payload;
            const key = JSON.stringify(value);
            if (op === "ADD" && !vals[key]) {
                vals[key] = true;
                count++;
                const hash = entry.hash;
                yield { value, hash };
            }
            else if (op === "DEL" && !vals[key]) {
                vals[key] = true;
            }
            if (amount !== undefined && count >= amount) {
                break;
            }
        }
    };
    const all = async () => {
        const values = [];
        for await (const entry of iterator()) {
            values.unshift(entry);
        }
        return new Set(values.map((v) => v.value));
    };
    return {
        add,
        del,
        iterator,
        all,
    };
};
SetApi.type = type;
export default SetDb;
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