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import { create } from "zustand";
export interface MediaItem {
id: string;
name: string;
type: "image" | "video" | "audio";
file: File;
url: string; // Object URL for preview
thumbnailUrl?: string; // For video thumbnails
duration?: number; // For video/audio duration
aspectRatio: number; // width / height
}
interface MediaStore {
mediaItems: MediaItem[];
// Actions
addMediaItem: (item: Omit<MediaItem, "id">) => void;
removeMediaItem: (id: string) => void;
clearAllMedia: () => void;
}
// Helper function to determine file type
export const getFileType = (file: File): "image" | "video" | "audio" | null => {
const { type } = file;
if (type.startsWith("image/")) {
return "image";
}
if (type.startsWith("video/")) {
return "video";
}
if (type.startsWith("audio/")) {
return "audio";
}
return null;
};
// Helper function to get image aspect ratio
export const getImageAspectRatio = (file: File): Promise<number> => {
return new Promise((resolve, reject) => {
const img = new Image();
img.addEventListener("load", () => {
const aspectRatio = img.naturalWidth / img.naturalHeight;
resolve(aspectRatio);
img.remove();
});
img.addEventListener("error", () => {
reject(new Error("Could not load image"));
img.remove();
});
img.src = URL.createObjectURL(file);
});
};
// Helper function to generate video thumbnail and get aspect ratio
export const generateVideoThumbnail = (
file: File
): Promise<{ thumbnailUrl: string; aspectRatio: number }> => {
return new Promise((resolve, reject) => {
const video = document.createElement("video");
const canvas = document.createElement("canvas");
const ctx = canvas.getContext("2d");
if (!ctx) {
reject(new Error("Could not get canvas context"));
return;
}
video.addEventListener("loadedmetadata", () => {
canvas.width = video.videoWidth;
canvas.height = video.videoHeight;
// Seek to 1 second or 10% of duration, whichever is smaller
video.currentTime = Math.min(1, video.duration * 0.1);
});
video.addEventListener("seeked", () => {
ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
const thumbnailUrl = canvas.toDataURL("image/jpeg", 0.8);
const aspectRatio = video.videoWidth / video.videoHeight;
resolve({ thumbnailUrl, aspectRatio });
// Cleanup
video.remove();
canvas.remove();
});
video.addEventListener("error", () => {
reject(new Error("Could not load video"));
video.remove();
canvas.remove();
});
video.src = URL.createObjectURL(file);
video.load();
});
};
// Helper function to get media duration
export const getMediaDuration = (file: File): Promise<number> => {
return new Promise((resolve, reject) => {
const element = document.createElement(
file.type.startsWith("video/") ? "video" : "audio"
) as HTMLVideoElement | HTMLAudioElement;
element.addEventListener("loadedmetadata", () => {
resolve(element.duration);
element.remove();
});
element.addEventListener("error", () => {
reject(new Error("Could not load media"));
element.remove();
});
element.src = URL.createObjectURL(file);
element.load();
});
};
export const useMediaStore = create<MediaStore>((set, get) => ({
mediaItems: [],
addMediaItem: (item) => {
const newItem: MediaItem = {
...item,
id: crypto.randomUUID(),
};
set((state) => ({
mediaItems: [...state.mediaItems, newItem],
}));
},
removeMediaItem: (id) => {
const state = get();
const item = state.mediaItems.find((item) => item.id === id);
// Cleanup object URLs to prevent memory leaks
if (item) {
URL.revokeObjectURL(item.url);
if (item.thumbnailUrl) {
URL.revokeObjectURL(item.thumbnailUrl);
}
}
set((state) => ({
mediaItems: state.mediaItems.filter((item) => item.id !== id),
}));
},
clearAllMedia: () => {
const state = get();
// Cleanup all object URLs
state.mediaItems.forEach((item) => {
URL.revokeObjectURL(item.url);
if (item.thumbnailUrl) {
URL.revokeObjectURL(item.thumbnailUrl);
}
});
set({ mediaItems: [] });
},
}));
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