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<!DOCTYPE html>
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<h2><a href="index.html">Documentation</a></h2><div class="category"><h3>Modules</h3><ul><li><a href="module-DonorListAPI.html">DonorListAPI</a></li></ul><h3>Classes</h3><ul><li><a href="ProgressService.html">ProgressService</a></li></ul><h3>Global</h3><ul><li><a href="global.html#GET/api/progress/:id">GET /api/progress/:id</a></li></ul></div><div class="category"><h2>Routes</h2><h3>Modules</h3><ul><li><a href="module-DonorAPI.html">DonorAPI</a></li><li><a href="module-EventAPI.html">EventAPI</a></li><li><a href="module-UserAPI.html">UserAPI</a></li></ul></div>
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<h1>progressService.js</h1>
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<pre class="prettyprint source linenums"><code>// Server/src/services/progressService.js
/**
* Simple progress tracking service
* Used to track progress of long-running operations
*/
class ProgressService {
constructor() {
// Store progress information for all active operations
this.operations = new Map();
// Only start timer in non-test environments
if (process.env.NODE_ENV !== 'test') {
this.cleanupInterval = setInterval(() => this.cleanupOperations(), 10 * 60 * 1000);
}
}
/**
* Create a new operation and return operation ID
* @param {string} type Operation type (e.g., 'import', 'export')
* @param {string} userId User ID
* @param {number} totalItems Total number of items (for calculating progress percentage)
* @returns {Object} Contains operation object and operation ID
*/
createOperation(type, userId, totalItems = 100) {
const trackingId = `${type}_${Date.now()}`;
// Create the operation object with all required fields
const operation = {
id: trackingId,
type,
userId,
status: 'initializing',
progress: 0,
message: 'Operation initialized',
totalItems,
startTime: new Date(),
lastUpdated: new Date()
};
// Store the operation in the Map
this.operations.set(trackingId, operation);
console.log(`Created operation: ${trackingId} for user ${userId}`);
// Return both the operation object and its ID
return {
operation,
trackingId
};
}
/**
* Update operation progress
* @param {string} operationId Operation ID
* @param {number} progress Progress percentage (0-100)
* @param {string} message Progress message
* @param {string} status Operation status
* @returns {boolean} Whether the update was successful
*/
updateProgress(operationId, progress, message, status) {
const operation = this.operations.get(operationId);
if (!operation) {
console.warn(`Attempting to update non-existent operation ${operationId}`);
return false;
}
// Update operation data
operation.progress = progress;
operation.lastUpdated = new Date();
if (message) operation.message = message;
if (status) operation.status = status;
// Set expiration time if operation is completed or failed
if (status === 'completed' || status === 'error') {
operation.expiresAt = Date.now() + 30 * 60 * 1000; // Expire after 30 minutes
}
return true;
}
/**
* Get operation progress
* @param {string} operationId Operation ID
* @returns {Object|null} Operation progress information or null if operation doesn't exist
*/
getProgress(operationId) {
const operation = this.operations.get(operationId);
if (!operation) {
return null;
}
return {
id: operation.id,
type: operation.type,
progress: operation.progress,
status: operation.status,
message: operation.message,
startTime: operation.startTime,
lastUpdated: operation.lastUpdated,
result: operation.result
};
}
/**
* Get all operations for a user
* @param {string} userId User ID
* @returns {Array} List of user's operations
*/
getUserOperations(userId) {
const userOperations = [];
for (const operation of this.operations.values()) {
if (operation.userId === userId) {
userOperations.push({
id: operation.id,
type: operation.type,
progress: operation.progress,
status: operation.status,
message: operation.message,
startTime: operation.startTime,
lastUpdated: operation.lastUpdated
});
}
}
return userOperations;
}
/**
* Cancel an operation
* @param {string} operationId Operation ID
* @param {string} userId User ID (for permission check)
* @returns {boolean} Whether the cancellation was successful
*/
cancelOperation(operationId, userId) {
const operation = this.operations.get(operationId);
if (!operation) {
return false;
}
// Check user permissions
if (operation.userId !== userId) {
return false;
}
// Update operation status
operation.status = 'cancelled';
operation.message = 'Operation cancelled by user';
operation.lastUpdated = new Date();
operation.expiresAt = Date.now() + 10 * 60 * 1000; // Expire after 10 minutes
// Clean up cancelled operation immediately
setTimeout(() => {
if (this.operations.has(operationId)) {
this.operations.delete(operationId);
}
}, 10 * 60 * 1000);
return true;
}
/**
* Clean up expired operations
* @private
*/
cleanupOperations() {
const now = Date.now();
for (const [operationId, operation] of this.operations.entries()) {
// Clean up operations that have been processing for more than 10 minutes (may be stuck)
if (operation.status === 'processing' &&
now - operation.lastUpdated > 10 * 60 * 1000) {
console.log(`Cleaning up stuck operation: ${operationId}`);
this.operations.delete(operationId);
}
// Clean up expired operations
if (operation.expiresAt && now > operation.expiresAt) {
console.log(`Cleaning up expired operation: ${operationId}`);
this.operations.delete(operationId);
}
}
}
}
// Create singleton instance
const progressService = new ProgressService();
export default progressService;</code></pre>
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