@towns-protocol/sdk/dist/streamStateView_DMChannel.js

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import { StreamStateView_AbstractContent } from './streamStateView_AbstractContent';
import { check } from '@towns-protocol/dlog';
import { logNever } from './check';
import { userIdFromAddress } from './id';
export class StreamStateView_DMChannel extends StreamStateView_AbstractContent {
    dmStreamsView;
    streamId;
    get firstPartyId() {
        return this.dmStreamModel.firstPartyId;
    }
    get secondPartyId() {
        return this.dmStreamModel.secondPartyId;
    }
    get lastEventCreatedAtEpochMs() {
        return this.dmStreamModel.lastEventCreatedAtEpochMs;
    }
    get dmStreamModel() {
        return this.dmStreamsView.get(this.streamId);
    }
    constructor(streamId, dmStreamsView) {
        super();
        this.dmStreamsView = dmStreamsView;
        this.streamId = streamId;
    }
    applySnapshot(snapshot, content, _cleartexts, _encryptionEmitter) {
        if (content.inception) {
            this.dmStreamsView.setParticipants(this.streamId, userIdFromAddress(content.inception.firstPartyAddress), userIdFromAddress(content.inception.secondPartyAddress));
        }
    }
    appendEvent(event, cleartext, encryptionEmitter, stateEmitter) {
        check(event.remoteEvent.event.payload.case === 'dmChannelPayload');
        const payload = event.remoteEvent.event.payload.value;
        switch (payload.content.case) {
            case 'inception':
                this.updateLastEvent(event.remoteEvent, stateEmitter);
                break;
            case 'message':
                this.decryptEvent('channelMessage', event, payload.content.value, cleartext, encryptionEmitter);
                this.updateLastEvent(event.remoteEvent, stateEmitter);
                break;
            case undefined:
                break;
            default:
                logNever(payload.content);
        }
    }
    prependEvent(event, cleartext, encryptionEmitter, _stateEmitter) {
        check(event.remoteEvent.event.payload.case === 'dmChannelPayload');
        const payload = event.remoteEvent.event.payload.value;
        switch (payload.content.case) {
            case 'inception':
                this.updateLastEvent(event.remoteEvent, undefined);
                break;
            case 'message':
                this.decryptEvent('channelMessage', event, payload.content.value, cleartext, encryptionEmitter);
                this.updateLastEvent(event.remoteEvent, undefined);
                break;
            case undefined:
                break;
            default:
                logNever(payload.content);
        }
    }
    onDecryptedContent(_eventId, _content, _stateEmitter) {
        // pass
    }
    onConfirmedEvent(event, stateEmitter, encryptionEmitter) {
        super.onConfirmedEvent(event, stateEmitter, encryptionEmitter);
    }
    onAppendLocalEvent(event, stateEmitter) {
        this.dmStreamsView.setLastEventCreatedAtEpochMs(this.streamId, event.createdAtEpochMs);
        stateEmitter?.emit('streamLatestTimestampUpdated', this.streamId);
    }
    updateLastEvent(event, stateEmitter) {
        const createdAtEpochMs = event.event.createdAtEpochMs;
        if (createdAtEpochMs > this.lastEventCreatedAtEpochMs) {
            this.dmStreamsView.setLastEventCreatedAtEpochMs(this.streamId, createdAtEpochMs);
            stateEmitter?.emit('streamLatestTimestampUpdated', this.streamId);
        }
    }
    participants() {
        if (!this.firstPartyId || !this.secondPartyId) {
            return new Set();
        }
        return new Set([this.firstPartyId, this.secondPartyId]);
    }
}
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