import type { IRenderSlotService } from './interfaces';
interface SlotAllocation {
elementId: string;
slots: number;
}
/**
* Service that manages render slots for dynamic content.
* Elements can claim slots to expand their visual space.
* Containers can query total slots needed for proper sizing.
*/
export class RenderSlotService implements IRenderSlotService {
private allocations = new Map<string, SlotAllocation[]>();
/**
* Claim a number of render slots for an element
* @param elementId The element claiming slots
* @param count Number of slots to claim
* @param containerId The container to claim slots from
*/
claimSlots(elementId: string, count: number, containerId: string): void {
const containerAllocations = this.allocations.get(containerId) || [];
// Remove any existing allocation for this element
const filtered = containerAllocations.filter(a => a.elementId !== elementId);
// Add new allocation if count > 0
if (count > 0) {
filtered.push({ elementId, slots: count });
}
this.allocations.set(containerId, filtered);
}
/**
* Release all slots claimed by an element
* @param elementId The element releasing slots
* @param containerId The container to release slots from
*/
releaseSlots(elementId: string, containerId: string): void {
const containerAllocations = this.allocations.get(containerId) || [];
const filtered = containerAllocations.filter(a => a.elementId !== elementId);
if (filtered.length > 0) {
this.allocations.set(containerId, filtered);
} else {
this.allocations.delete(containerId);
}
}
/**
* Get total slots claimed in a container
* @param containerId The container to query
* @returns Total number of slots claimed
*/
getTotalSlots(containerId: string): number {
const containerAllocations = this.allocations.get(containerId) || [];
return containerAllocations.reduce((total, allocation) => total + allocation.slots, 0);
}
/**
* Clear all allocations for a container
* @param containerId The container to clear
*/
clearContainer(containerId: string): void {
this.allocations.delete(containerId);
}
}
