Show avg

src/controllers/PrinterController.ts

@@ -74,12 +74,17 @@ class PrinterController {
       }
     })
 
-    if (printer)
+    if (printer) {
+      const avgMonthPrint = await PrinterStatusService.avgMonthPrint(
+        printer.serialNumber
+      )
+
       res.json({
         ...printer,
+        avgMonthPrint,
         status: distributedCopy(printer.status, Number(take))
       })
-    else res.status(400).json({ error: 'Printer not found' })
+    } else res.status(400).json({ error: 'Printer not found' })
   }
 
   static async edit(req: Request, res: Response) {

src/services/PrinterStatusService.ts

@@ -254,4 +254,52 @@ export class PrinterStatusService {
 
     return printerInfo
   }
+
+  static async avgMonthPrint(serialNumber: string) {
+    const gte = new Date(new Date().getTime() - 1000 * 3600 * 24 * 180)
+
+    const firstPrinterStatus = await prisma.printerStatus.findFirst({
+      where: {
+        printer: {
+          serialNumber
+        },
+        timestamp: {
+          gte
+        }
+      },
+      orderBy: { timestamp: 'asc' }
+    })
+
+    const lastPrinterStatus = await prisma.printerStatus.findFirst({
+      where: {
+        printer: {
+          serialNumber
+        },
+        timestamp: {
+          gte
+        }
+      },
+      orderBy: { timestamp: 'desc' }
+    })
+
+    if (!firstPrinterStatus || !lastPrinterStatus) return 0
+
+    const firstCounter = firstPrinterStatus.counter
+    const lastCounter = lastPrinterStatus.counter
+
+    const firstTimestamp = firstPrinterStatus.timestamp
+    const lastTimestamp = lastPrinterStatus.timestamp
+
+    const timeDiff = lastTimestamp.getTime() - firstTimestamp.getTime()
+
+    const counterDiff = lastCounter - firstCounter
+
+    const avgMonthPrint = Math.floor(
+      counterDiff / (timeDiff / 1000 / 3600 / 24 / 30)
+    )
+
+    console.log(counterDiff, timeDiff, avgMonthPrint)
+
+    return avgMonthPrint
+  }
 }

web/src/views/Printer.vue

@@ -13,6 +13,24 @@
         <printer-counter-chart v-if="printer" :status="printer?.status" />
       </v-col>
     </v-row>
+    <v-row v-if="printer?.avgMonthPrint">
+      <v-col>
+        <v-card>
+          <v-card-title class="font-weight-regular">
+            Média mensal de impressões
+          </v-card-title>
+
+          <v-card-text>
+            <span class="text-h3">
+              {{
+                new Intl.NumberFormat('pt-BR').format(printer?.avgMonthPrint)
+              }}
+            </span>
+            <div>Baseado nos dados dos últimos 180 dias</div>
+          </v-card-text>
+        </v-card>
+      </v-col>
+    </v-row>
   </v-container>
 </template>
 <script lang="ts" setup>