Merge segments before sending a webhook #742 (#743)

server/spec/analytic_controller.jest.ts

@@ -7,9 +7,11 @@ jest.mock('grafana-datasource-kit', () => (
   }
 ));
 
-import { saveAnalyticUnitFromObject, runDetect } from '../src/controllers/analytics_controller';
+import { saveAnalyticUnitFromObject, runDetect, onDetect } from '../src/controllers/analytics_controller';
 import * as AnalyticUnit from '../src/models/analytic_units';
 import * as AnalyticUnitCache from '../src/models/analytic_unit_cache_model';
+import * as Segment from '../src/models/segment_model';
+import { buildSegments, clearDB, TEST_ANALYTIC_UNIT_ID } from './utils_for_tests/segments';
 
 import { HASTIC_API_KEY } from '../src/config';
 
@@ -88,3 +90,66 @@ describe('Check detection range', function() {
     expect(queryByMetric).toBeCalledWith(analyticUnitObj.metric, undefined, expectedFrom, to, HASTIC_API_KEY);
   });
 });
+
+describe('onDetect', () => {
+  const INITIAL_SEGMENTS = buildSegments([[0, 1], [2, 3], [4, 5]]);
+
+  beforeAll(async () => {
+    clearDB();
+    await AnalyticUnit.create(
+      AnalyticUnit.createAnalyticUnitFromObject({
+        _id: TEST_ANALYTIC_UNIT_ID,
+        name: 'name',
+        grafanaUrl: 'grafanaUrl',
+        panelId: 'panelId',
+        type: 'type',
+        detectorType: AnalyticUnit.DetectorType.ANOMALY
+      })
+    );
+    await AnalyticUnitCache.create(TEST_ANALYTIC_UNIT_ID);
+    await AnalyticUnitCache.setData(TEST_ANALYTIC_UNIT_ID, { timeStep: 1 });
+  });
+
+  beforeEach(async () => {
+    await Segment.mergeAndInsertSegments(INITIAL_SEGMENTS);
+  });
+
+  afterEach(async () => {
+    clearDB();
+  });
+
+  it('should not send a webhook after merging', async () => {
+    const detectedSegmentIds = await onDetect({
+      analyticUnitId: TEST_ANALYTIC_UNIT_ID,
+      segments: buildSegments([[5, 6]]),
+      lastDetectionTime: 0,
+      cache: {
+        data: {
+          timeStep: 1
+        }
+      }
+    });
+    let detectedSegments = await Promise.all(
+      detectedSegmentIds.map(id => Segment.findOne(id))
+    );
+
+    expect(
+      detectedSegments.map(segment => [segment.from, segment.to])
+    ).toEqual([]);
+  });
+
+  it('should send a webhook when there was no merging', async () => {
+    const detectedSegmentIds = await onDetect({
+      analyticUnitId: TEST_ANALYTIC_UNIT_ID,
+      segments: buildSegments([[7, 8]]),
+      lastDetectionTime: 0
+    });
+    let detectedSegments = await Promise.all(
+      detectedSegmentIds.map(id => Segment.findOne(id))
+    );
+
+    expect(
+      detectedSegments.map(segment => [segment.from, segment.to])
+    ).toEqual([[7, 8]]);
+  });
+});

server/spec/segments.jest.ts

@@ -1,18 +1,18 @@
-import { deleteNonDetectedSegments } from '../src/controllers/analytics_controller';
+import { buildSegments, clearDB, TEST_ANALYTIC_UNIT_ID } from './utils_for_tests/segments';
+
 import * as AnalyticUnit from '../src/models/analytic_units';
 import * as Segment from '../src/models/segment_model';
 import * as AnalyticUnitCache from '../src/models/analytic_unit_cache_model';
 
 import * as _ from 'lodash';
 
-const TEST_ID: AnalyticUnit.AnalyticUnitId = 'testid';
-const INITIAL_SEGMENTS = segmentBuilder([[0, 1], [2, 3], [4, 5]]);
+const INITIAL_SEGMENTS = buildSegments([[0, 1], [2, 3], [4, 5]]);
 
 beforeAll(async () => {
   clearDB();
   await AnalyticUnit.create(
     AnalyticUnit.createAnalyticUnitFromObject({
-      _id: TEST_ID,
+      _id: TEST_ANALYTIC_UNIT_ID,
       name: 'name',
       grafanaUrl: 'grafanaUrl',
       panelId: 'panelId',
@@ -20,59 +20,27 @@ beforeAll(async () => {
       detectorType: AnalyticUnit.DetectorType.ANOMALY
     })
   );
-  await AnalyticUnitCache.create(TEST_ID);
-  await AnalyticUnitCache.setData(TEST_ID, { timeStep: 1 });
+  await AnalyticUnitCache.create(TEST_ANALYTIC_UNIT_ID);
+  await AnalyticUnitCache.setData(TEST_ANALYTIC_UNIT_ID, { timeStep: 1 });
 });
 
 beforeEach(async () => {
-  await Segment.insertSegments(INITIAL_SEGMENTS);
+  await Segment.mergeAndInsertSegments(INITIAL_SEGMENTS);
 });
 
 afterEach(async () => {
   clearDB();
 });
 
-describe('Check deleted segments', function() {
-  let payload = {
-    lastDetectionTime: 0,
-    segments: [],
-    cache: null
-  };
-
-  it('previous segments not found', async function() {
-    payload.segments = segmentBuilder([[0, 1], [4, 5]]);
-    expect(await getDeletedSegments(TEST_ID, payload)).toEqual(segmentBuilder([[2, 3]]));
-  });
-
-  it('all previous segments found', async function() {
-    payload.segments = segmentBuilder([[0, 1], [2, 3], [4, 5]]);
-    expect(await getDeletedSegments(TEST_ID, payload)).toEqual([]);
-  });
+describe('mergeAndInsertSegments', function() {
+  it('Should be merged before insertion', async function() {
+    const segmentsToInsert = buildSegments([[1, 2]]);
+    await Segment.mergeAndInsertSegments(segmentsToInsert);
 
+    let actualSegments = await Segment.findMany(TEST_ANALYTIC_UNIT_ID, {});
+    actualSegments.forEach(s => { s.id = undefined });
+    actualSegments = _.sortBy(actualSegments, s => s.from);
+    expect(actualSegments).toEqual(buildSegments([[0, 3], [4, 5]]));
   });
-
-async function getDeletedSegments(TEST_ID, payload): Promise<Segment.Segment[]> {
-  const preSegments = await Segment.findMany(TEST_ID, { labeled: false, deleted: false });
-  await deleteNonDetectedSegments(TEST_ID, payload);
-  const postSegments = await Segment.findMany(TEST_ID, { labeled: false, deleted: false });
-  const deleted = setDifference(preSegments, postSegments);
-  return deleted.map(s => {
-    s.id = undefined;
-    return s;
-  });
-}
-
-function setDifference(a, b: Segment.Segment[]): Segment.Segment[] {
-  return _.differenceWith(a, b, (x, y: Segment.Segment) => x.equals(y));
-}
-
-function segmentBuilder(times) {
-  return times.map(t => {
-    return new Segment.Segment(TEST_ID, t[0], t[1], false, false, undefined);
 });
-}
 
-async function clearDB() {
-  const segments = await Segment.findMany(TEST_ID, { labeled: false, deleted: false });
-  await Segment.removeSegments(segments.map(s => s.id));
-}

server/spec/utils_for_tests/segments.ts

@@ -0,0 +1,15 @@
+import * as AnalyticUnit from '../../src/models/analytic_units';
+import * as Segment from '../../src/models/segment_model';
+
+export const TEST_ANALYTIC_UNIT_ID: AnalyticUnit.AnalyticUnitId = 'testid';
+
+export function buildSegments(times: number[][]): Segment.Segment[] {
+  return times.map(t => {
+    return new Segment.Segment(TEST_ANALYTIC_UNIT_ID, t[0], t[1], false, false, undefined);
+  });
+}
+
+export async function clearDB(): Promise<void> {
+  const segments = await Segment.findMany(TEST_ANALYTIC_UNIT_ID, { labeled: false, deleted: false });
+  await Segment.removeSegments(segments.map(s => s.id));
+}

server/src/controllers/analytics_controller.ts

@@ -59,27 +59,42 @@ function onTaskResult(taskResult: TaskResult) {
   }
 }
 
-async function onDetect(detectionResult: DetectionResult) {
+/**
+ * Processes detection result from analytics` DETECT message
+ * @returns IDs of segments inserted into DB if there was no merging
+ */
+export async function onDetect(detectionResult: DetectionResult): Promise<Segment.SegmentId[]> {
   detectionsCount++;
   let id = detectionResult.analyticUnitId;
   let payload = await processDetectionResult(id, detectionResult);
+  const insertionResult = await Segment.mergeAndInsertSegments(payload.segments)
   await Promise.all([
-    Segment.insertSegments(payload.segments),
     AnalyticUnitCache.setData(id, payload.cache),
     AnalyticUnit.setDetectionTime(id, payload.lastDetectionTime),
   ]);
+  // removedIds.length > 0 means that there was at least 1 merge
+  if(insertionResult.removedIds.length > 0) {
+    return [];
+  }
+
+  return insertionResult.addedIds;
 }
 
-async function onPushDetect(detectionResult: DetectionResult) {
+/**
+ * Processes detection result from analytics` PUSH_DETECT message
+ * Sends a webhook if it's needed
+ */
+async function onPushDetect(detectionResult: DetectionResult): Promise<void> {
   const analyticUnit = await AnalyticUnit.findById(detectionResult.analyticUnitId);
-  if (!_.isEmpty(detectionResult.segments) && analyticUnit.alert) {
+  const segments = await onDetect(detectionResult);
+  if(!_.isEmpty(segments) && analyticUnit.alert) {
     try {
-      alertService.receiveAlert(analyticUnit, _.last(detectionResult.segments));
+      const segment = await Segment.findOne(_.last(segments))
+      alertService.receiveAlert(analyticUnit, segment);
     } catch(err) {
       console.error(`error while sending webhook: ${err.message}`);
     }
   }
-  await onDetect(detectionResult);
 }
 
 async function onMessage(message: AnalyticsMessage) {
@@ -368,13 +383,9 @@ export async function runDetect(id: AnalyticUnit.AnalyticUnitId, from?: number,
     }
 
     const payload = await processDetectionResult(id, result.payload);
-    const cache = AnalyticUnitCache.AnalyticUnitCache.fromObject({ _id: id, data: payload.cache });
 
-    // TODO: uncomment it
-    // It clears segments when redetecting on another timerange
-    // await deleteNonDetectedSegments(id, payload);
+    await Segment.mergeAndInsertSegments(payload.segments);
     await Promise.all([
-      Segment.insertSegments(payload.segments),
       AnalyticUnitCache.setData(id, payload.cache),
       AnalyticUnit.setDetectionTime(id, range.to - intersection),
     ]);
@@ -427,13 +438,6 @@ async function cancelAnalyticsTask(analyticUnitId: AnalyticUnit.AnalyticUnitId)
   }
 }
 
-export async function deleteNonDetectedSegments(id, payload) {
-  let lastDetectedSegments = await Segment.findMany(id, { labeled: false, deleted: false });
-  let segmentsToRemove: Segment.Segment[];
-  segmentsToRemove = _.differenceWith(lastDetectedSegments, payload.segments, (a, b: Segment.Segment) => a.equals(b));
-  Segment.removeSegments(segmentsToRemove.map(s => s.id));
-}
-
 async function processDetectionResult(analyticUnitId: AnalyticUnit.AnalyticUnitId, detectionResult: DetectionResult):
   Promise<{
     lastDetectionTime: number,
@@ -521,11 +525,11 @@ export async function updateSegments(
   id: AnalyticUnit.AnalyticUnitId,
   segmentsToInsert: Segment.Segment[],
   removedIds: Segment.SegmentId[]
-) {
+): Promise<{ addedIds: Segment.SegmentId[] }> {
   await Segment.removeSegments(removedIds);
-  const addedIds = await Segment.insertSegments(segmentsToInsert);
+  const insertionResult = await Segment.mergeAndInsertSegments(segmentsToInsert);
 
-  return { addedIds };
+  return { addedIds: insertionResult.addedIds };
 }
 
 export async function runLearningWithDetection(

server/src/models/segment_model.ts

@@ -78,6 +78,10 @@ export type FindManyQuery = {
   deleted?: boolean
 }
 
+export async function findOne(segmentId: SegmentId): Promise<Segment> {
+  return db.findOne({ _id: segmentId });
+}
+
 export async function findMany(id: AnalyticUnitId, query: FindManyQuery): Promise<Segment[]> {
   var dbQuery: any = { analyticUnitId: id };
   if(query.labeled !== undefined) {
@@ -86,6 +90,15 @@ export async function findMany(id: AnalyticUnitId, query: FindManyQuery): Promis
   if(query.deleted !== undefined) {
     dbQuery.deleted = query.deleted;
   }
+  if(query.from !== undefined) {
+    dbQuery.from = query.from;
+  }
+  if(query.to !== undefined) {
+    dbQuery.to = query.to;
+  }
+  if(query.$or !== undefined) {
+    dbQuery.$or = query.$or;
+  }
   let segs = await db.findMany(dbQuery);
   if(segs === null) {
     return [];
@@ -93,81 +106,59 @@ export async function findMany(id: AnalyticUnitId, query: FindManyQuery): Promis
   return segs.map(Segment.fromObject);
 }
 
-export async function insertSegments(segments: Segment[]) {
+/**
+ * Merges an array of segments with ones existing in the DB
+ * Inserts resulting segments into DB
+ * @param segments segments to be inserted
+ * @returns IDs of added and removed segments
+ */
+export async function mergeAndInsertSegments(segments: Segment[]): Promise<{
+  addedIds: SegmentId[],
+  removedIds: SegmentId[]
+}> {
   if(_.isEmpty(segments)) {
-    return [];
+    return { addedIds: [], removedIds: [] };
   }
   const analyticUnitId: AnalyticUnitId = segments[0].analyticUnitId;
-  const learningSegments = await findMany(analyticUnitId, {
-    labeled: true,
-    deleted: false
-  });
-
   let segmentIdsToRemove: SegmentId[] = [];
   let segmentsToInsert: Segment[] = [];
 
   for(let segment of segments) {
-    const intersectedLearning = learningSegments.filter(s => {
-      return segment.from <= s.to && segment.to >= s.from;
-    });
-    if(intersectedLearning.length > 0) {
+    if(await isIntersectedWithExistingLabeled(segment)) {
       continue;
     }
 
     if(!segment.deleted && !segment.labeled) {
-      const intersectedWithDeletedSegments = await findMany(analyticUnitId, {
-        to: { $gte: segment.from },
-        from: { $lte: segment.to },
-        labeled: false,
-        deleted: true
-      });
-
-      if(intersectedWithDeletedSegments.length > 0) {
+      if(await isIntersectedWithExistingDeleted(segment)) {
         continue;
       }
     }
 
     let cache = await AnalyticUnitCache.findById(analyticUnitId);
-    const timeStep = cache.getTimeStep();
     let unit = await AnalyticUnit.findById(analyticUnitId);
     const detector = unit.detectorType;
 
-    if(detector !== AnalyticUnit.DetectorType.PATTERN) {
-      const intersectedWithLeftBound = await findMany(analyticUnitId, {
-        to: { $gte: segment.from - timeStep, $lte: segment.from },
-        labeled: false,
-        deleted: false
-      });
-
-      if(intersectedWithLeftBound.length > 0) {
-        const leftSegment = _.minBy(intersectedWithLeftBound, s => s.from);
-        segment.from = leftSegment.from;
-        segmentIdsToRemove.push(leftSegment.id);
-      }
-
-      const intersectedWithRightBound = await findMany(analyticUnitId, {
-        from: { $gte: segment.to, $lte: segment.to + timeStep },
-        labeled: false,
-        deleted: false
-      });
-
-      if(intersectedWithRightBound.length > 0) {
-        const rightSegment = _.maxBy(intersectedWithRightBound, s => s.to);
-        segment.to = rightSegment.to;
-        segmentIdsToRemove.push(rightSegment.id);
-      }
-    }
-
-    const intersectedSegments = await findMany(analyticUnitId, {
+    let intersectedSegments: Segment[];
+    if(detector === AnalyticUnit.DetectorType.PATTERN) {
+      intersectedSegments = await findMany(analyticUnitId, {
         to: { $gte: segment.from },
         from: { $lte: segment.to },
         labeled: segment.labeled,
         deleted: segment.deleted
       });
+    } else {
+      const timeStep = cache.getTimeStep();
+      intersectedSegments = await findMany(analyticUnitId, {
+        to: { $gte: segment.from - timeStep },
+        from: { $lte: segment.to + timeStep },
+        labeled: segment.labeled,
+        deleted: segment.deleted
+      });
+    }
 
     if(intersectedSegments.length > 0) {
-      let from = _.minBy(intersectedSegments, 'from').from;
-      let to = _.maxBy(intersectedSegments, 'to').to;
+      let from = _.minBy(intersectedSegments.concat(segment), s => s.from).from;
+      let to = _.maxBy(intersectedSegments.concat(segment), s => s.to).to;
       let newSegment = Segment.fromObject(segment.toObject());
       newSegment.from = from;
       newSegment.to = to;
@@ -179,7 +170,11 @@ export async function insertSegments(segments: Segment[]) {
   }
 
   await db.removeMany(segmentIdsToRemove);
-  return db.insertMany(segmentsToInsert.map(s => s.toObject()));
+  const addedIds = await db.insertMany(segmentsToInsert.map(s => s.toObject()));
+  return {
+    addedIds,
+    removedIds: segmentIdsToRemove
+  };
 }
 
 export async function setSegmentsDeleted(ids: SegmentId[]) {
@@ -189,3 +184,25 @@ export async function setSegmentsDeleted(ids: SegmentId[]) {
 export function removeSegments(idsToRemove: SegmentId[]) {
   return db.removeMany(idsToRemove);
 }
+
+async function isIntersectedWithExistingLabeled(segment: Segment): Promise<boolean> {
+  const intersected = await findMany(segment.analyticUnitId, {
+    labeled: true,
+    deleted: false,
+    from: { $lte: segment.to },
+    to: { $gte: segment.from }
+  });
+
+  return intersected.length > 0;
+}
+
+async function isIntersectedWithExistingDeleted(segment: Segment): Promise<boolean> {
+  const intersected = await findMany(segment.analyticUnitId, {
+    labeled: false,
+    deleted: true,
+    from: { $lte: segment.to },
+    to: { $gte: segment.from }
+  });
+
+  return intersected.length > 0;
+}