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import { TimelineElement } from "@/types/timeline";
// Helper function to check for element overlaps and prevent invalid timeline states
export const checkElementOverlaps = (elements: TimelineElement[]): boolean => {
// Sort elements by start time
const sortedElements = [...elements].sort(
(a, b) => a.startTime - b.startTime,
);
for (let i = 0; i < sortedElements.length - 1; i++) {
const current = sortedElements[i];
const next = sortedElements[i + 1];
const currentEnd =
current.startTime +
(current.duration - current.trimStart - current.trimEnd);
// Check if current element overlaps with next element
if (currentEnd > next.startTime) return true; // Overlap detected
}
return false; // No overlaps
};
// Helper function to resolve overlaps by adjusting element positions
export const resolveElementOverlaps = (
elements: TimelineElement[],
): TimelineElement[] => {
// Sort elements by start time
const sortedElements = [...elements].sort(
(a, b) => a.startTime - b.startTime,
);
const resolvedElements: TimelineElement[] = [];
for (let i = 0; i < sortedElements.length; i++) {
const current = { ...sortedElements[i] };
if (resolvedElements.length > 0) {
const previous = resolvedElements[resolvedElements.length - 1];
const previousEnd =
previous.startTime +
(previous.duration - previous.trimStart - previous.trimEnd);
// If current element would overlap with previous, push it after previous ends
if (current.startTime < previousEnd) {
current.startTime = previousEnd;
}
}
resolvedElements.push(current);
}
return resolvedElements;
};
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