1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
import { createSelector } from 'reselect';
const UpdateSearchText = 'logs/UpdateSearchText';
const UpdateLogTail = 'logs/UpdateLogTail';
const LogSize = 300;
const getLogs = s => s.logs.logs;
const getTail = s => s.logs.tail;
export const getSearchText = s => s.logs.searchText;
export const getLogsForDisplay = createSelector(
getLogs,
getTail,
getSearchText,
(logs, tail, searchText) => {
const x = [];
for (let i = tail; i >= 0; i--) {
x.push(logs[i]);
}
if (logs.length === LogSize) {
for (let i = LogSize - 1; i > tail; i--) {
x.push(logs[i]);
}
}
if (searchText === '') return x;
return x.filter(r => r.payload.toLowerCase().indexOf(searchText) >= 0);
}
);
export function updateSearchText(text) {
return {
type: UpdateSearchText,
payload: { searchText: text.toLowerCase() }
};
}
export function appendLog(log) {
return (dispatch, getState) => {
const s = getState();
const logs = getLogs(s);
const tailCurr = getTail(s);
const tail = tailCurr >= LogSize - 1 ? 0 : tailCurr + 1;
// mutate intentionally for performance
logs[tail] = log;
dispatch({
type: UpdateLogTail,
payload: { tail }
});
};
}
const initialState = {
searchText: '',
logs: [],
// tail's initial value must be -1
tail: -1
};
export default function reducer(state = initialState, { type, payload }) {
switch (type) {
case UpdateLogTail:
case UpdateSearchText: {
return { ...state, ...payload };
}
default:
return state;
}
}
|
