Repository navigation
Expand file tree
/
Copy pathproduceEffects.ts
More file actions
72 lines (62 loc) · 1.94 KB
/
Copy pathproduceEffects.ts
File metadata and controls
72 lines (62 loc) · 1.94 KB
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
72
import isEqual from "react-fast-compare";
import type { AggregateOutput } from "./AggregateOutput";
import type { Effect } from "./Effect";
export function produceEffects(
prevOutput: AggregateOutput,
nextOutput: AggregateOutput,
): Effect[] {
const output: Effect[] = [];
if (!isEqual(prevOutput, nextOutput)) {
output.push({
_TAG: "%SOMETHING_CHANGED%",
});
}
for (
let i = 0;
i < Math.max(prevOutput.activities.length, nextOutput.activities.length);
i += 1
) {
const prevActivity = prevOutput.activities[i];
const nextActivity = nextOutput.activities[i];
if (!prevActivity && !!nextActivity) {
output.push({
_TAG: nextActivity.pushedBy.name === "Pushed" ? "PUSHED" : "REPLACED",
activity: nextActivity,
});
}
const isPrevActivityPopped =
prevActivity?.transitionState === "exit-done" ||
prevActivity?.transitionState === "exit-active";
const isNextActivityPushed =
nextActivity?.transitionState === "enter-active" ||
nextActivity?.transitionState === "enter-done";
if (isPrevActivityPopped && isNextActivityPushed) {
output.push({
_TAG: nextActivity.pushedBy.name === "Pushed" ? "PUSHED" : "REPLACED",
activity: nextActivity,
});
}
}
for (
let j =
Math.max(prevOutput.activities.length, nextOutput.activities.length) - 1;
j >= 0;
j -= 1
) {
const prevActivity = prevOutput.activities[j];
const nextActivity = nextOutput.activities[j];
const isPrevActivityPushed =
prevActivity?.transitionState === "enter-done" ||
prevActivity?.transitionState === "enter-active";
const isNextActivityPopped =
nextActivity?.transitionState === "exit-active" ||
nextActivity?.transitionState === "exit-done";
if (isPrevActivityPushed && isNextActivityPopped) {
output.push({
_TAG: "POPPED",
activity: nextActivity,
});
}
}
return output;
}