@fdm-monster/server/dist/state/printer-thumbnail.cache.js

FDM Monster is a bulk OctoPrint, Klipper, PrusaLink and BambuLab manager to set up, configure and monitor 3D printers. Our aim is to provide neat overview over your farm.

import { KeyDiffCache } from "../utils/cache/key-diff.cache.js";
//#region src/state/printer-thumbnail.cache.ts
/**
* Cache for printer thumbnails using analyzed print job files
* Automatically uses the most recent completed or active print job thumbnail
*/
var PrinterThumbnailCache = class PrinterThumbnailCache extends KeyDiffCache {
	logger;
	constructor(loggerFactory, printJobService, fileStorageService) {
		super();
		this.printJobService = printJobService;
		this.fileStorageService = fileStorageService;
		this.logger = loggerFactory(PrinterThumbnailCache.name);
	}
	async loadCache() {
		this.logger.log("Loading printer thumbnail cache from print jobs...");
		try {
			const recentJobs = await this.printJobService.printJobRepository.createQueryBuilder("job").select("job.printerId").addSelect("MAX(job.endedAt)", "maxEndedAt").where("job.fileStorageId IS NOT NULL").andWhere("job.analysisState = :state", { state: "ANALYZED" }).groupBy("job.printerId").getRawMany();
			let loadedCount = 0;
			for (const result of recentJobs) {
				const printerId = result.job_printerId;
				if (printerId) try {
					await this.loadPrinterThumbnail(printerId);
					loadedCount++;
				} catch (error) {
					this.logger.warn(`Failed to load thumbnail for printer ${printerId}: ${error}`);
				}
			}
			this.logger.log(`Loaded ${loadedCount} printer thumbnails from print jobs`);
		} catch (error) {
			this.logger.error("Failed to load thumbnail cache", error);
		}
	}
	/**
	* Load thumbnail for a specific printer from its most recent print job
	*/
	async loadPrinterThumbnail(printerId) {
		try {
			const job = await this.printJobService.printJobRepository.findOne({
				where: {
					printerId,
					analysisState: "ANALYZED"
				},
				order: {
					endedAt: "DESC",
					startedAt: "DESC",
					createdAt: "DESC"
				}
			});
			if (!job || !job.fileStorageId) {
				this.logger.debug(`No suitable job found for printer ${printerId}`);
				return;
			}
			if (((await this.fileStorageService.loadMetadata(job.fileStorageId))?._thumbnails || []).length === 0) {
				this.logger.debug(`No thumbnails found for job ${job.id}`);
				return;
			}
			const thumbnailBuffer = await this.fileStorageService.getThumbnail(job.fileStorageId, 0);
			if (!thumbnailBuffer) {
				this.logger.warn(`Thumbnail file not found for job ${job.id}`);
				return;
			}
			const thumbnailBase64 = thumbnailBuffer.toString("base64");
			await this.setPrinterThumbnail(printerId, thumbnailBase64, job.id, job.fileName);
			this.logger.debug(`Loaded thumbnail for printer ${printerId} from job ${job.id}`);
		} catch (error) {
			this.logger.error(`Failed to load thumbnail for printer ${printerId}: ${error}`);
			throw error;
		}
	}
	/**
	* Set/update printer thumbnail in cache
	*/
	async setPrinterThumbnail(printerId, thumbnailBase64, jobId, fileName) {
		await this.setKeyValue(printerId, {
			printerId,
			thumbnailBase64,
			jobId,
			fileName,
			updatedAt: /* @__PURE__ */ new Date()
		});
	}
	/**
	* Remove printer thumbnail from cache
	*/
	async unsetPrinterThumbnail(printerId) {
		await this.deleteKeyValue(printerId);
	}
	/**
	* Reset entire cache
	*/
	async resetCache() {
		this.logger.log("Resetting printer thumbnail cache");
		this.keyValueStore.clear();
		this.resetDiffs();
	}
	/**
	* Update thumbnail after print job completes
	* Called by event handlers when a job finishes
	*/
	async handleJobCompleted(printerId, jobId) {
		try {
			this.logger.log(`Updating thumbnail for printer ${printerId} after job ${jobId} completed`);
			await this.loadPrinterThumbnail(printerId);
		} catch (error) {
			this.logger.error(`Failed to update thumbnail after job completion: ${error}`);
		}
	}
	/**
	* Update thumbnail after print job starts (for active print preview)
	* Called by event handlers when a job starts
	*/
	async handleJobStarted(printerId, jobId) {
		try {
			const job = await this.printJobService.printJobRepository.findOne({ where: { id: jobId } });
			if (!job || !job.fileStorageId) return;
			if (((await this.fileStorageService.loadMetadata(job.fileStorageId))?._thumbnails || []).length === 0) return;
			const thumbnailBuffer = await this.fileStorageService.getThumbnail(job.fileStorageId, 0);
			if (!thumbnailBuffer) return;
			const thumbnailBase64 = thumbnailBuffer.toString("base64");
			await this.setPrinterThumbnail(printerId, thumbnailBase64, job.id, job.fileName);
			this.logger.debug(`Updated thumbnail for printer ${printerId} from started job ${job.id}`);
		} catch (error) {
			this.logger.error(`Failed to update thumbnail after job start: ${error}`);
		}
	}
};
//#endregion
export { PrinterThumbnailCache };

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