SupplyAgent/web/src/types/demand.ts

export interface DemandBelongItem {
  id: number
  name: string | null
  category_id: number
  reason: string | null
}

export interface DemandBelongResponse {
  items: DemandBelongItem[]
}

export interface DemandVideoItem {
  vid: string
  title: string | null
  inspiration_points_json: string | null
  purpose_points_json: string | null
  key_points_json: string | null
}

export interface DemandVideosResponse {
  demand_belong_id: number
  name: string | null
  category_id: number
  videos: DemandVideoItem[]
}

/** category_id → demands belonging to that category */
export type DemandsByCategory = Record<number, DemandBelongItem[]>

export function groupDemandsByCategory(items: DemandBelongItem[]): DemandsByCategory {
  const map: DemandsByCategory = {}
  for (const item of items) {
    const key = item.category_id
    if (!map[key]) map[key] = []
    map[key].push(item)
  }
  return map
}