1 files changed, 57 insertions, 0 deletions
diff --git a/src/pybind/mgr/dashboard/frontend/src/app/shared/services/device.service.ts b/src/pybind/mgr/dashboard/frontend/src/app/shared/services/device.service.ts
new file mode 100644
index 000000000..b433f235b
--- /dev/null
+++ b/src/pybind/mgr/dashboard/frontend/src/app/shared/services/device.service.ts
@@ -0,0 +1,57 @@
+import { Injectable } from '@angular/core';
+
+import moment from 'moment';
+
+import { CdDevice } from '../models/devices';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class DeviceService {
+  /**
+   * Calculates additional data and appends them as new attributes to the given device.
+   */
+  calculateAdditionalData(device: CdDevice): CdDevice {
+    if (!device.life_expectancy_min || !device.life_expectancy_max) {
+      device.state = 'unknown';
+      return device;
+    }
+    const hasDate = (float: string): boolean => !!Number.parseFloat(float);
+    const weeks = (isoDate1: string, isoDate2: string): number =>
+      !isoDate1 || !isoDate2 || !hasDate(isoDate1) || !hasDate(isoDate2)
+        ? null
+        : moment.duration(moment(isoDate1).diff(moment(isoDate2))).asWeeks();
+
+    const ageOfStamp = moment
+      .duration(moment(moment.now()).diff(moment(device.life_expectancy_stamp)))
+      .asWeeks();
+    const max = weeks(device.life_expectancy_max, device.life_expectancy_stamp);
+    const min = weeks(device.life_expectancy_min, device.life_expectancy_stamp);
+
+    if (ageOfStamp > 1) {
+      device.state = 'stale';
+    } else if (max !== null && max <= 2) {
+      device.state = 'bad';
+    } else if (min !== null && min <= 4) {
+      device.state = 'warning';
+    } else {
+      device.state = 'good';
+    }
+
+    device.life_expectancy_weeks = {
+      max: max !== null ? Math.round(max) : null,
+      min: min !== null ? Math.round(min) : null
+    };
+
+    return device;
+  }
+
+  readable(device: CdDevice): CdDevice {
+    device.readableDaemons = device.daemons.join(' ');
+    return device;
+  }
+
+  prepareDevice(device: CdDevice): CdDevice {
+    return this.readable(this.calculateAdditionalData(device));
+  }
+}