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server/src/api-v1/server-info/server-info.service.ts

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+import { Injectable } from '@nestjs/common';
+import systemInformation from 'systeminformation';
+import { ServerInfoDto } from './dto/server-info.dto';
+
+@Injectable()
+export class ServerInfoService {
+  constructor() {}
+  async getServerInfo() {
+    const res = await systemInformation.fsSize();
+
+    const size = res[0].size;
+    const used = res[0].used;
+    const available = res[0].available;
+    const percentageUsage = res[0].use;
+
+    const serverInfo = new ServerInfoDto();
+    serverInfo.diskAvailable = this.getHumanReadableString(available);
+    serverInfo.diskSize = this.getHumanReadableString(size);
+    serverInfo.diskUse = this.getHumanReadableString(used);
+    serverInfo.diskAvailableRaw = available;
+    serverInfo.diskSizeRaw = size;
+    serverInfo.diskUseRaw = used;
+    serverInfo.diskUsagePercentage = percentageUsage;
+
+    return serverInfo;
+  }
+
+  private getHumanReadableString(sizeInByte: number) {
+    const pepibyte = 1.126 * Math.pow(10, 15);
+    const tebibyte = 1.1 * Math.pow(10, 12);
+    const gibibyte = 1.074 * Math.pow(10, 9);
+    const mebibyte = 1.049 * Math.pow(10, 6);
+    const kibibyte = 1024;
+    // Pebibyte
+    if (sizeInByte >= pepibyte) {
+      // Pe
+      return `${(sizeInByte / pepibyte).toFixed(1)}PB`;
+    } else if (tebibyte <= sizeInByte && sizeInByte < pepibyte) {
+      // Te
+      return `${(sizeInByte / tebibyte).toFixed(1)}TB`;
+    } else if (gibibyte <= sizeInByte && sizeInByte < tebibyte) {
+      // Gi
+      return `${(sizeInByte / gibibyte).toFixed(1)}GB`;
+    } else if (mebibyte <= sizeInByte && sizeInByte < gibibyte) {
+      // Mega
+      return `${(sizeInByte / mebibyte).toFixed(1)}MB`;
+    } else if (kibibyte <= sizeInByte && sizeInByte < mebibyte) {
+      // Kibi
+      return `${(sizeInByte / kibibyte).toFixed(1)}KB`;
+    } else {
+      return `${sizeInByte}B`;
+    }
+  }
+}