@sidequest/engine/dist/job/job-transitioner.js

@sidequest/engine is the core engine of SideQuest, a distributed background job processing system for Node.js and TypeScript.

import { logger, UniquenessFactory } from '@sidequest/core';
import { inspect } from 'util';

/**
 * Handles applying job transitions and updating jobs in the backend.
 */
class JobTransitioner {
    /**
     * Applies a transition to a job and updates it in the backend.
     *
     * This method checks if the transition should run based on the job's current state.
     * If applicable, it applies the transition and updates the job in the backend.
     *
     * @param jobData The job data to update.
     * @param transition The job transition to apply.
     * @returns A promise resolving to the updated job data.
     */
    static apply(backend, jobData, transition) {
        if (!transition.shouldRun(jobData)) {
            logger("JobTransitioner").debug(`Transition ${transition.constructor.name} not applicable for job ${jobData.id}. Returning original job data.`);
            return jobData;
        }
        logger("JobTransitioner").debug(`Applying transition ${transition.constructor.name} to job ${jobData.id}`);
        const newData = transition.apply(jobData);
        if (newData.uniqueness_config) {
            const uniqueness = UniquenessFactory.create(newData.uniqueness_config);
            newData.unique_digest = uniqueness.digest(jobData);
        }
        logger("JobTransitioner").debug(`Updating with new job data: ${inspect(newData)}`);
        return backend.updateJob(newData);
    }
}

export { JobTransitioner };
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