@river-build/sdk/dist/migrations/snapshotMigration0001.js

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import { bin_equal } from '@river-build/dlog';
// Generic compactFunc function
function compactFunc(elements, keyFn) {
    if (elements.length === 0) {
        return elements;
    }
    let j = 1;
    for (let i = 1; i < elements.length; i++) {
        const key2 = keyFn(elements[i]);
        const key1 = keyFn(elements[i - 1]);
        if (!bin_equal(key2, key1)) {
            elements[j] = elements[i];
            j++;
        }
    }
    return elements.slice(0, j);
}
// / nasty bug with the insert_sorted function, it was inserting an extra element at the end
// / every insert, we need to remove duplicates
export function snapshotMigration0001(snapshot) {
    if (snapshot.members) {
        snapshot.members.joined = compactFunc(snapshot.members.joined, (m) => m.userAddress);
    }
    switch (snapshot.content?.case) {
        case 'spaceContent': {
            snapshot.content.value.channels = compactFunc(snapshot.content.value.channels, (c) => c.channelId);
            break;
        }
        case 'userContent': {
            snapshot.content.value.memberships = compactFunc(snapshot.content.value.memberships, (c) => c.streamId);
            break;
        }
        case 'userSettingsContent': {
            snapshot.content.value.fullyReadMarkers = compactFunc(snapshot.content.value.fullyReadMarkers, (c) => c.streamId);
            break;
        }
    }
    return snapshot;
}
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