ImportContext generalized to TaskContext

src/services/task_context.js

@@ -0,0 +1,65 @@
+"use strict";
+
+const ws = require('./ws.js');
+
+// taskId => TaskContext
+const taskContexts = {};
+
+class TaskContext {
+    constructor(taskId, taskType, data) {
+        this.taskId = taskId;
+        this.taskType = taskType;
+        this.data = data;
+
+        // progressCount is meant to represent just some progress - to indicate the task is not stuck
+        this.progressCount = 0;
+        this.lastSentCountTs = Date.now();
+    }
+
+    /** @return {TaskContext} */
+    static getInstance(taskId, data) {
+        if (!taskContexts[taskId]) {
+            taskContexts[taskId] = new TaskContext(taskId, 'import', data);
+        }
+
+        return taskContexts[taskId];
+    }
+
+    async increaseProgressCount() {
+        this.progressCount++;
+
+        if (Date.now() - this.lastSentCountTs >= 300) {
+            this.lastSentCountTs = Date.now();
+
+            await ws.sendMessageToAllClients({
+                type: 'task-progress-count',
+                taskId: this.taskId,
+                taskType: this.taskType,
+                progressCount: this.progressCount
+            });
+        }
+    }
+
+    // must remaing non-static
+    async reportError(message) {
+        await ws.sendMessageToAllClients({
+            type: 'task-error',
+            taskId: this.taskId,
+            taskType: this.taskType,
+            message: message
+        });
+    }
+
+    // must remaing non-static
+    async taskSucceeded(parentNoteId, importedNoteId) {
+        await ws.sendMessageToAllClients({
+            type: 'task-succeeded',
+            taskId: this.taskId,
+            taskType: this.taskType,
+            parentNoteId: parentNoteId,
+            importedNoteId: importedNoteId
+        });
+    }
+}
+
+module.exports = TaskContext;