From 24f4b8d32fc08623d21a567611d2dbdb5122538e Mon Sep 17 00:00:00 2001
From: till <till@s.chulte.de>
Date: Sun, 2 Aug 2020 11:53:34 +0200
Subject: [PATCH] remove now redundant backend and make gts more stable

---
 Backend/Dockerfile                   | 13 -------------
 Backend/docker-compose.yml           |  9 ---------
 Backend/requirements.txt             |  2 --
 Backend/server.py                    | 28 ----------------------------
 lib/widgets/audio_visualization.dart | 14 ++++++++++++--
 5 files changed, 12 insertions(+), 54 deletions(-)
 delete mode 100644 Backend/Dockerfile
 delete mode 100644 Backend/docker-compose.yml
 delete mode 100644 Backend/requirements.txt
 delete mode 100644 Backend/server.py

diff --git a/Backend/Dockerfile b/Backend/Dockerfile
deleted file mode 100644
index c3cea38..0000000
--- a/Backend/Dockerfile
+++ /dev/null
@@ -1,13 +0,0 @@
-FROM rcarmo/ubuntu-python:onbuild
-
-RUN apt update && apt-get install software-properties-common --no-install-recommends -y && add-apt-repository ppa:chris-needham/ppa -y \
-    && apt-get update -y \
-    && apt-get install audiowaveform -y
-
-WORKDIR /home/src/
-
-ADD server.py /home/src/server.py
-
-EXPOSE 3000
-
-CMD ["python", "server.py"]
\ No newline at end of file
diff --git a/Backend/docker-compose.yml b/Backend/docker-compose.yml
deleted file mode 100644
index c81fa81..0000000
--- a/Backend/docker-compose.yml
+++ /dev/null
@@ -1,9 +0,0 @@
-version: "2.4"
-
-services:
-  handler:
-      build: .
-      command: python server.py
-      working_dir: /home/src
-      ports:
-      - 3000:3000
\ No newline at end of file
diff --git a/Backend/requirements.txt b/Backend/requirements.txt
deleted file mode 100644
index 5eaf725..0000000
--- a/Backend/requirements.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-flask
-requests
\ No newline at end of file
diff --git a/Backend/server.py b/Backend/server.py
deleted file mode 100644
index f6c6d42..0000000
--- a/Backend/server.py
+++ /dev/null
@@ -1,28 +0,0 @@
-from flask import Flask, request, Response
-import subprocess
-import requests
-
-app = Flask(__name__)
-
-
-@app.route('/')
-def a():
-    sp_id = request.args.get("id")
-    url = f"https://p.scdn.co/mp3-preview/{sp_id}"
-
-    with requests.get(url) as g:
-        print(g.status_code)
-        pipe = subprocess.Popen(
-            ["audiowaveform", "--input-format", "mp3", "--output-format",
-             "json"],
-            stdout=subprocess.PIPE, stdin=subprocess.PIPE,
-            stderr=subprocess.STDOUT)
-
-        stdout, error = pipe.communicate(input=g.content)
-
-        stdout = b'{"' + stdout.split(b'{"')[1].split(B"Done")[0]
-
-        return Response(stdout)
-
-
-app.run("0.0.0.0", 3000)
diff --git a/lib/widgets/audio_visualization.dart b/lib/widgets/audio_visualization.dart
index eeaace9..4b6e4e0 100644
--- a/lib/widgets/audio_visualization.dart
+++ b/lib/widgets/audio_visualization.dart
@@ -12,18 +12,28 @@ class SoundData {
   List<int> data;
 
   SoundData(String jsonData) {
-    dynamic jsonObject = json.decode(jsonData);
+    assert (false);
+    assert(jsonData != null);
+    assert(jsonData != "{}");
+    dynamic jsonObject;
+    try {
+      jsonObject = json.decode(jsonData);
+    } on FormatException {
+      throw new Exception("Error while parsing.");
+    }
     channels = jsonObject["channels"];
     sampleRate = jsonObject["sample_rate"];
     samplesPerPixel = jsonObject["samples_per_pixel"];
     bits = jsonObject["bits"];
     length = jsonObject["length"];
     List<dynamic> temp = jsonObject["data"];
+    if (temp == null) {
+      print("");
+    }
     data = List<int>();
     for (int i = 0; i < temp.length; i++) {
       data.add(temp[i] as int);
     }
-    print("");
   }
 
   Size savedSize;