paperless-ngx/src-ui/src/app/components/manage/logs/logs.component.ts

import {
  Component,
  ElementRef,
  OnInit,
  AfterViewChecked,
  ViewChild,
} from '@angular/core'
import { LogService } from 'src/app/services/rest/log.service'

@Component({
  selector: 'app-logs',
  templateUrl: './logs.component.html',
  styleUrls: ['./logs.component.scss'],
})
export class LogsComponent implements OnInit, AfterViewChecked {
  constructor(private logService: LogService) {}

  logs: string[] = []

  logFiles: string[] = []

  activeLog: string

  @ViewChild('logContainer') logContainer: ElementRef

  ngOnInit(): void {
    this.logService.list().subscribe((result) => {
      this.logFiles = result
      if (this.logFiles.length > 0) {
        this.activeLog = this.logFiles[0]
        this.reloadLogs()
      }
    })
  }

  ngAfterViewChecked() {
    this.scrollToBottom()
  }

  reloadLogs() {
    this.logService.get(this.activeLog).subscribe({
      next: (result) => {
        this.logs = result
      },
      error: () => {
        this.logs = []
      },
    })
  }

  getLogLevel(log: string) {
    if (log.indexOf('[DEBUG]') != -1) {
      return 10
    } else if (log.indexOf('[WARNING]') != -1) {
      return 30
    } else if (log.indexOf('[ERROR]') != -1) {
      return 40
    } else if (log.indexOf('[CRITICAL]') != -1) {
      return 50
    } else {
      return 20
    }
  }

  scrollToBottom(): void {
    this.logContainer?.nativeElement.scroll({
      top: this.logContainer.nativeElement.scrollHeight,
      left: 0,
      behavior: 'auto',
    })
  }
}