quid_faciam_hodie/lib/widgets/memory_slide.dart

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'package:share_location/controllers/status_controller.dart';
import 'package:share_location/enums.dart';
import 'package:share_location/foreign_types/memory.dart';
import 'package:share_location/models/timeline_overlay.dart';
import 'package:share_location/widgets/status.dart';

import 'memory.dart';

const BAR_HEIGHT = 4.0;
const DEFAULT_IMAGE_DURATION = Duration(seconds: 5);

class MemorySlide extends StatefulWidget {
  final Memory memory;

  const MemorySlide({
    Key? key,
    required this.memory,
  }) : super(key: key);

  @override
  State<MemorySlide> createState() => _MemorySlideState();
}

class _MemorySlideState extends State<MemorySlide>
    with TickerProviderStateMixin {
  StatusController? controller;

  Duration? duration;

  @override
  void initState() {
    super.initState();

    final timelineOverlay = context.read<TimelineOverlay>();

    timelineOverlay.addListener(() {
      if (!mounted) {
        return;
      }

      switch (timelineOverlay.state) {
        case TimelineState.playing:
          controller?.start();
          break;
        default:
          controller?.stop();
      }
    });
  }

  @override
  void dispose() {
    controller?.dispose();

    super.dispose();
  }

  void initializeAnimation(final Duration duration) {
    final timelineOverlay = context.read<TimelineOverlay>();

    this.duration = duration;

    controller = StatusController(
      duration: duration,
    );

    controller!.addListener(() {
      if (!mounted) {
        return;
      }

      if (controller!.done) {
        timelineOverlay.setState(TimelineState.completed);
      }
    }, ['done']);

    setState(() {});
  }

  @override
  Widget build(BuildContext context) {
    return Consumer<TimelineOverlay>(
      builder: (context, overlayController, _) => Status(
        controller: controller,
        disabled: !overlayController.showOverlay,
        child: MemoryView(
          creationDate: widget.memory.creationDate,
          location: widget.memory.location,
          filename: widget.memory.filename,
          loopVideo: false,
          onFileDownloaded: () {
            if (widget.memory.type == MemoryType.photo) {
              initializeAnimation(DEFAULT_IMAGE_DURATION);
            }
          },
          onVideoControllerInitialized: (controller) {
            if (mounted) {
              initializeAnimation(controller.value.duration);

              overlayController.addListener(() {
                if (!mounted) {
                  return;
                }

                if (overlayController.state == TimelineState.playing) {
                  controller.play();
                } else {
                  controller.pause();
                }
              }, ['state']);
            }
          },
        ),
      ),
    );
  }
}