/
topic.js
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/
topic.js
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// @ts-check
/** @typedef {import("@cuser/proto/types/graphs").GraphTopic} GraphTopic */
/** @typedef {import("@cuser/proto/types/actions").ActionPublishMessage} ActionPublishMessage */
/** @typedef {import("@cuser/proto/types/actions").ActionUpdateMessage} ActionUpdateMessage */
/** @typedef {import("@cuser/proto/types/actions").ActionDeleteMessage} ActionDeleteMessage */
// Types
const { GraphType } = require('@cuser/proto/graphs');
const {
TYPE_ACTION_PUBLISH_MESSAGE,
TYPE_ACTION_UPDATE_MESSAGE,
TYPE_ACTION_DELETE_MESSAGE
} = require('../types/actions');
// Utils
const createReducer = require('../utils/createReducer');
/**
* Topic reducer
* @param {GraphTopic} [state]
* @param {ActionPublishMessage|ActionUpdateMessage|ActionDeleteMessage} action
*/
const topicReducer = createReducer({
[TYPE_ACTION_PUBLISH_MESSAGE]: ({ count = 0 } = {}) => ({
type: GraphType.GRAPH_TOPIC,
message: '@message',
count: count + 1
}),
[TYPE_ACTION_UPDATE_MESSAGE]: (state) => ({
...state,
message: '@message',
}),
[TYPE_ACTION_DELETE_MESSAGE]: (state) => ({
...state,
message: '@message',
count: state.count - 1
})
});
module.exports = topicReducer;