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const RUN_COALESCE_MAX_INTERVAL = 10 /* min */ * 60 /* sec */ * 1000; /* ms */
export class Messages {
channels = $state({});
inChannel(channel) {
return this.channels[channel];
}
addMessage(channel, id, { at, sender, body }) {
let parsedAt = new Date(at);
const message = { id, at: parsedAt, body };
let runs = (this.channels[channel] ||= []);
let currentRun = runs.slice(-1)[0];
if (currentRun === undefined) {
currentRun = { sender, messages: [message] };
runs.push(currentRun);
} else {
let lastMessage = currentRun.messages.slice(-1)[0];
let newRun =
currentRun.sender !== sender
|| parsedAt - lastMessage.at > RUN_COALESCE_MAX_INTERVAL;
if (newRun) {
currentRun = { sender, messages: [message] };
runs.push(currentRun);
} else {
currentRun.messages.push(message);
}
}
return this;
}
setMessages(messages) {
this.channels = {};
for (let { channel, id, at, sender, body } of messages) {
this.addMessage(channel, id, at, sender, body);
}
return this;
}
deleteMessage(messageId) {
for (let channel in this.channels) {
this.channels[channel] = this.channels[channel]
.map(({ sender, messages }) => ({
sender,
messages: messages.filter(({ id }) => id != messageId)
}))
.filter(({ messages }) => messages.length > 0);
}
return this;
}
deleteChannel(id) {
delete this.channels[id];
return this;
}
}
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