From 8a995a8ca5840fbb2a9731f6e2cd0dea1ae93f1b Mon Sep 17 00:00:00 2001
From: Alexander-D-Karpov <alexandr.d.karpov@gmail.com>
Date: Tue, 11 Apr 2023 22:10:54 +0300
Subject: [PATCH] added file previews, file page

---
 akarpov/files/previews/__init__.py       |  3 ++
 akarpov/files/previews/image/__init__.py |  1 +
 akarpov/files/previews/image/jpeg.py     | 35 ++++++++++++++++++++++++
 akarpov/files/previews/video/__init__.py |  1 +
 akarpov/files/previews/video/mp4.py      | 20 ++++++++++++++
 akarpov/files/services/preview.py        |  3 +-
 akarpov/files/tasks.py                   |  2 +-
 akarpov/files/views.py                   | 16 +++++++++++
 akarpov/templates/base.html              |  2 +-
 akarpov/templates/files/list.html        | 35 +++++++++++++++++++++---
 akarpov/templates/files/view.html        | 33 ++++++++++++++++++++++
 11 files changed, 144 insertions(+), 7 deletions(-)
 create mode 100644 akarpov/files/previews/__init__.py
 create mode 100644 akarpov/files/previews/image/__init__.py
 create mode 100644 akarpov/files/previews/image/jpeg.py
 create mode 100644 akarpov/files/previews/video/__init__.py
 create mode 100644 akarpov/files/previews/video/mp4.py
 create mode 100644 akarpov/templates/files/view.html

diff --git a/akarpov/files/previews/__init__.py b/akarpov/files/previews/__init__.py
new file mode 100644
index 0000000..df2941f
--- /dev/null
+++ b/akarpov/files/previews/__init__.py
@@ -0,0 +1,3 @@
+from . import image, video
+
+previews = {"video": {"mp4": video.mp4.view}, "image": {"jpeg": image.jpeg.view}}
diff --git a/akarpov/files/previews/image/__init__.py b/akarpov/files/previews/image/__init__.py
new file mode 100644
index 0000000..ae2d45a
--- /dev/null
+++ b/akarpov/files/previews/image/__init__.py
@@ -0,0 +1 @@
+from . import jpeg  # noqa
diff --git a/akarpov/files/previews/image/jpeg.py b/akarpov/files/previews/image/jpeg.py
new file mode 100644
index 0000000..bb7aa50
--- /dev/null
+++ b/akarpov/files/previews/image/jpeg.py
@@ -0,0 +1,35 @@
+from akarpov.files.models import File
+
+
+def view(file: File) -> (str, str):
+    static = """
+    <link  href="https://cdnjs.cloudflare.com/ajax/libs/viewerjs/1.11.3/viewer.min.css" rel="stylesheet">
+    """
+    content = (
+        f"""
+        <div>
+          <img id="image" class="img-fluid" src="{file.file.url}" alt="Picture">
+        </div>
+      <script src="/static/js/jquery.js"></script>
+    """
+        + """
+          <script src="https://cdnjs.cloudflare.com/ajax/libs/viewerjs/1.11.3/viewer.min.js">
+            var $image = $('#image');
+
+            $image.viewer({
+              inline: true,
+              viewed: function() {
+                $image.viewer('zoomTo', 1);
+              }
+            });
+
+            // Get the Viewer.js instance after initialized
+            var viewer = $image.data('viewer');
+
+            // View a list of images
+            $('#images').viewer();
+      </script>
+    """
+    )
+
+    return static, content
diff --git a/akarpov/files/previews/video/__init__.py b/akarpov/files/previews/video/__init__.py
new file mode 100644
index 0000000..6c53191
--- /dev/null
+++ b/akarpov/files/previews/video/__init__.py
@@ -0,0 +1 @@
+from . import mp4  # noqa
diff --git a/akarpov/files/previews/video/mp4.py b/akarpov/files/previews/video/mp4.py
new file mode 100644
index 0000000..93864ee
--- /dev/null
+++ b/akarpov/files/previews/video/mp4.py
@@ -0,0 +1,20 @@
+from akarpov.files.models import File
+
+
+def view(file: File) -> (str, str):
+    static = """
+    <link href="https://vjs.zencdn.net/8.0.4/video-js.css" rel="stylesheet" />
+    """
+    data = """"playbackRates": [0.5, 1, 1.5, 2], "responsive": true }"""
+    content = f"""
+
+      <video id="my_video_1" class="video-js vjs-default-skin" height="500px"
+          controls poster='{file.preview.url}'
+          data-setup='{data}'>
+        <source src="{file.file.url}" type='video/mp4' />
+      </video>
+
+      <script src="https://vjs.zencdn.net/8.0.4/video.min.js"></script>
+    """
+
+    return static, content
diff --git a/akarpov/files/services/preview.py b/akarpov/files/services/preview.py
index 5c3551b..af61183 100644
--- a/akarpov/files/services/preview.py
+++ b/akarpov/files/services/preview.py
@@ -84,7 +84,8 @@ def create_preview(file_path: str) -> str:
 
 
 def get_file_mimetype(file_path: str) -> str:
-    return magic.from_file(file_path)
+    mime = magic.Magic(mime=True)
+    return mime.from_file(file_path)
 
 
 def get_description(file_path: str) -> str:
diff --git a/akarpov/files/tasks.py b/akarpov/files/tasks.py
index da22eef..561e071 100644
--- a/akarpov/files/tasks.py
+++ b/akarpov/files/tasks.py
@@ -31,7 +31,7 @@ def process_file(pk: int):
                 )
     except Exception as e:
         logger.error(e)
-    file.type = get_file_mimetype(file.file.path)
+    file.file_type = get_file_mimetype(file.file.path)
     descr = None
     try:
         descr = get_description(file.file.path)
diff --git a/akarpov/files/views.py b/akarpov/files/views.py
index d4a71f8..973ea99 100644
--- a/akarpov/files/views.py
+++ b/akarpov/files/views.py
@@ -11,10 +11,12 @@
     ChunkedUploadView,
 )
 from akarpov.files.models import File, Folder
+from akarpov.files.previews import previews
 
 
 class TopFolderView(LoginRequiredMixin, ListView):
     template_name = "files/list.html"
+    paginate_by = 20
     model = File
 
     def get_queryset(self):
@@ -33,6 +35,20 @@ class FileView(DetailView):
     model = File
     slug_field = "slug"
 
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        context["has_perm"] = self.object.user == self.request.user
+        static = ""
+        content = ""
+        if self.object.file_type:
+            t1, t2 = self.object.file_type.split("/")
+            if t1 in previews:
+                if t2 in previews[t1]:
+                    static, content = previews[t1][t2](self.object)
+        context["preview_static"] = static
+        context["preview_content"] = content
+        return context
+
 
 files_view = FileView.as_view()
 
diff --git a/akarpov/templates/base.html b/akarpov/templates/base.html
index 0d505aa..1826e4e 100644
--- a/akarpov/templates/base.html
+++ b/akarpov/templates/base.html
@@ -51,7 +51,7 @@
                         </li>
                         {% if request.user.is_authenticated %}
                         <li>
-                            <a href="{% url 'files:main' %}" class="{% active_link 'files' %} text-muted nav-link px-sm-0 px-2">
+                            <a href="{% url 'files:main' %}" class="{% active_link 'files:main' %} text-muted nav-link px-sm-0 px-2">
                                 <i class="fs-5 bi-folder-fill"></i><span class="ms-1 d-none d-sm-inline">Files</span></a>
                         </li>
                         {% endif %}
diff --git a/akarpov/templates/files/list.html b/akarpov/templates/files/list.html
index ec96413..e7b0683 100644
--- a/akarpov/templates/files/list.html
+++ b/akarpov/templates/files/list.html
@@ -57,8 +57,8 @@
           </symbol>
         </defs>
       </svg>
+      <p class="text-break" id="progress-message"></p>
       <div id="progress" class="progress w-100" style="display: none" role="progressbar" aria-label="Warning example" aria-valuenow="0" aria-valuemin="0" aria-valuemax="100">
-        <h1 id="progress-message"></h1>
         <div id="progress-bar" class="progress-bar text-bg-warning" style="width: 0%">0%</div>
       </div>
       <div id="messages"></div>
@@ -72,11 +72,36 @@
         <div class="align-self-stretch align-items-center justify-content-center d-flex flex-column fill-height controlsdiv">
           <img src="{{ file.file_image_url }}" class="img-fluid" alt="">
         </div>
+
+        <a href="{% url 'files:view' file.slug %}" class="stretched-link"></a>
         <p class="card-text mb-4 mt-2 ms-3"><small class="text-muted">{{ file.modified | naturaltime }}</small></p>
       </div>
   </div>
 {% endfor %}
 </div>
+{% if page_obj.has_other_pages %}
+<div class="btn-group" role="group" aria-label="Item pagination">
+    {% if page_obj.has_previous %}
+        <a href="?page={{ page_obj.previous_page_number }}" class="btn btn-outline-warning">&laquo;</a>
+    {% endif %}
+
+    {% for page_number in page_obj.paginator.page_range %}
+        {% if page_obj.number == page_number %}
+            <button class="btn btn-outline-warning active">
+                <span>{{ page_number }} <span class="sr-only">(current)</span></span>
+            </button>
+        {% else %}
+            <a href="?page={{ page_number }}" class="btn btn-outline-warning">
+                {{ page_number }}
+            </a>
+        {% endif %}
+    {% endfor %}
+
+    {% if page_obj.has_next %}
+        <a href="?page={{ page_obj.next_page_number }}" class="btn btn-outline-warning">&raquo;</a>
+    {% endif %}
+</div>
+{% endif %}
 {% endblock %}
 
 {% block inline_javascript %}
@@ -157,15 +182,14 @@
       add: function(e, data) { // Called before starting upload
         if (cur !== true){
           cur = true
-          console.log("add", data.files[0])
           form_data.splice(1);
           calculate_md5(data.files[0], 1000000);
           data.submit();
           $("#progress").css("display", "flex");
+          $("#progress-message").text("loading file: " + data.files[0].name);
         }
       },
       chunkdone: function (e, data) { // Called after uploading each chunk
-        console.log("chunkdone", data.files[0])
         if (form_data.length < 2) {
           form_data.push(
             {"name": "upload_id", "value": data.result.upload_id}
@@ -177,7 +201,10 @@
         sel.text(progress + "%");
       },
       done: function (e, data) { // Called when the file has completely uploaded
-        console.log("done", data.files[0])
+        var progress = 100;
+        let sel = $("#progress-bar");
+        sel.css("width", progress + "%");
+        sel.text(progress + "%");
         $.ajax({
           type: "POST",
           url: "{% url 'files:api_chunked_upload_complete' %}",
diff --git a/akarpov/templates/files/view.html b/akarpov/templates/files/view.html
new file mode 100644
index 0000000..3d8b2a2
--- /dev/null
+++ b/akarpov/templates/files/view.html
@@ -0,0 +1,33 @@
+{% extends 'base.html' %}
+
+{% block javascript %}
+{% autoescape off %}
+{{ preview_static }}
+{% endautoescape %}
+{% endblock %}
+
+{% block content %}
+<div class="row m-2">
+  <div class="col-auto">
+    <h1 class="fs-1">{{ file.name }}</h1>
+    {% if not has_perm %}
+        <p>Uploaded by: <a href="{% url 'users:detail' file.user.username %}">
+        {% if file.user.image_cropped %}<img class="rounded" width="20" src="{{ file.user.image_cropped.url }}" alt=""> {% endif %}
+          {{ file.user.username }}</a></p>
+    {% endif %}
+    <p class="mt-2">Last updated: {{ file.modified|date:"d.m.Y" }} {{ file.modified|time:"H:i" }}</p>
+    <p>File size: {{ file.file_size | filesizeformat }}</p>
+    {% if file.file_type %}
+    <p>File type: {{ file.file_type }}</p>
+    {% endif %}
+    {% if file.description %}
+    <p>{{ file.description }}</p>
+    {% endif %}
+  </div>
+  <div class="col-auto">
+  {% autoescape off %}
+  {{ preview_content }}
+  {% endautoescape %}
+  </div>
+</div>
+{% endblock %}