app/services/data/imageManager.ts

import ApiRequestService from "./apiRequestService";
import Url from "~/services/utils/url";
import ImageUtils from "~/services/utils/imageUtils";

class ImageManager {
    private apiRequestService: ApiRequestService;

    public constructor(apiRequestService: ApiRequestService) {
        this.apiRequestService = apiRequestService
    }

    public async get(id: number, height: number = 0, width: number = 0) {

        let url = `api/files/${id}/download`

        // Set requested size if needed
        if (height > 0 || width > 0) {
            // @see https://thumbor.readthedocs.io/en/latest/crop_and_resize_algorithms.html
            url = Url.join(url, `${height}x${width}`)
        }

        // Une image doit toujours avoir le time en options pour éviter les problème de cache
        const query = [new Date().getTime().toString()]

        const response: any = await this.apiRequestService.get(url, query)

        if(!response.data || response.data.size === 0) {
            throw new Error('Error: image not found or invalid')
        }

        const blob = await ImageUtils.newBlob(response.data)
        return await ImageUtils.blobToBase64(blob);
    }
}

export default ImageManager