wehub-resource-sync
133 lines
3.6 KiB
TypeScript
133 lines
3.6 KiB
TypeScript
import type { Action } from '@/lib/types/action';
|
|
|
|
export interface ActionNavigationTarget {
|
|
actionIndex: number;
|
|
actionId: string;
|
|
actionType: Action['type'];
|
|
lineNumber: number;
|
|
canJump: boolean;
|
|
}
|
|
|
|
export interface ActionLineProgress {
|
|
currentLine: number;
|
|
totalLines: number;
|
|
}
|
|
|
|
const UNSAFE_ACTION_TYPES = new Set<Action['type']>([
|
|
'play_video',
|
|
'discussion',
|
|
'widget_highlight',
|
|
'widget_setState',
|
|
'widget_annotation',
|
|
'widget_reveal',
|
|
]);
|
|
|
|
const WHITEBOARD_ACTION_TYPES = new Set<Action['type']>([
|
|
'wb_open',
|
|
'wb_draw_text',
|
|
'wb_draw_shape',
|
|
'wb_draw_chart',
|
|
'wb_draw_latex',
|
|
'wb_draw_table',
|
|
'wb_draw_line',
|
|
'wb_draw_code',
|
|
'wb_edit_code',
|
|
'wb_clear',
|
|
'wb_delete',
|
|
'wb_close',
|
|
]);
|
|
|
|
export function isUnsafePlaybackNavigationAction(action: Action): boolean {
|
|
return UNSAFE_ACTION_TYPES.has(action.type);
|
|
}
|
|
|
|
export function isWhiteboardPlaybackAction(action: Action): boolean {
|
|
return WHITEBOARD_ACTION_TYPES.has(action.type);
|
|
}
|
|
|
|
export function canReconstructPrefixForAction(
|
|
actions: readonly Action[],
|
|
actionIndex: number,
|
|
): boolean {
|
|
if (!Number.isInteger(actionIndex) || actionIndex < 0 || actionIndex >= actions.length) {
|
|
return false;
|
|
}
|
|
if (actions[actionIndex]?.type !== 'speech') return false;
|
|
|
|
for (let i = 0; i < actionIndex; i++) {
|
|
if (isUnsafePlaybackNavigationAction(actions[i])) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
export function canJumpWithinReconstructablePrefix(
|
|
actions: readonly Action[],
|
|
currentActionIndex: number | null | undefined,
|
|
targetActionIndex: number,
|
|
): boolean {
|
|
if (!canReconstructPrefixForAction(actions, targetActionIndex)) return false;
|
|
const currentLimit = Math.min(actions.length, Math.max(0, currentActionIndex ?? 0));
|
|
for (let i = 0; i < currentLimit; i++) {
|
|
if (isUnsafePlaybackNavigationAction(actions[i])) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
export function buildActionNavigationTargets(actions: readonly Action[]): ActionNavigationTarget[] {
|
|
let lineNumber = 0;
|
|
return actions.flatMap((action, actionIndex) => {
|
|
if (action.type !== 'speech') return [];
|
|
lineNumber += 1;
|
|
return [
|
|
{
|
|
actionIndex,
|
|
actionId: action.id,
|
|
actionType: action.type,
|
|
lineNumber,
|
|
canJump: canReconstructPrefixForAction(actions, actionIndex),
|
|
},
|
|
];
|
|
});
|
|
}
|
|
|
|
export function getActionLineProgress(
|
|
actions: readonly Action[],
|
|
currentActionIndex: number | null | undefined,
|
|
): ActionLineProgress {
|
|
const targets = buildActionNavigationTargets(actions);
|
|
if (targets.length === 0) {
|
|
return { currentLine: 0, totalLines: 0 };
|
|
}
|
|
|
|
const cursor = Math.max(0, currentActionIndex ?? 0);
|
|
const exactOrPrevious = [...targets].reverse().find((target) => target.actionIndex <= cursor);
|
|
const currentLine = exactOrPrevious?.lineNumber ?? targets[0].lineNumber;
|
|
return { currentLine, totalLines: targets.length };
|
|
}
|
|
|
|
export function getPreviousSafeSpeechActionIndex(
|
|
actions: readonly Action[],
|
|
currentActionIndex: number | null | undefined,
|
|
): number | null {
|
|
const cursor = Math.max(0, currentActionIndex ?? 0);
|
|
const target = [...buildActionNavigationTargets(actions)]
|
|
.reverse()
|
|
.find((candidate) => candidate.canJump && candidate.actionIndex < cursor);
|
|
return target?.actionIndex ?? null;
|
|
}
|
|
|
|
export function getNextSafeSpeechActionIndex(
|
|
actions: readonly Action[],
|
|
currentActionIndex: number | null | undefined,
|
|
): number | null {
|
|
const cursor = Math.max(0, currentActionIndex ?? 0);
|
|
const target = buildActionNavigationTargets(actions).find(
|
|
(candidate) => candidate.canJump && candidate.actionIndex > cursor,
|
|
);
|
|
return target?.actionIndex ?? null;
|
|
}
|