From 5552d258e600dbfdd25f2ac2475bbf296e891b48 Mon Sep 17 00:00:00 2001
From: Andrea Lepori <alepori@student.ethz.ch>
Date: Sun, 30 Aug 2020 15:05:28 +0200
Subject: generate file progressbar

---
 server/templates/server/doc_list.html |  49 ++++++++++++-
 server/urls.py                        |   4 +-
 server/views.py                       | 126 ++++++++++++++++++++++------------
 3 files changed, 133 insertions(+), 46 deletions(-)

diff --git a/server/templates/server/doc_list.html b/server/templates/server/doc_list.html
index 986b683..2159130 100644
--- a/server/templates/server/doc_list.html
+++ b/server/templates/server/doc_list.html
@@ -36,7 +36,7 @@
         </li>
         <li><a class="tooltipped modal-trigger" href="#modal2" data-position="top" data-tooltip="Archivia selezionati"><i class="material-icons">archive</i></a></li>
         <li><a class="tooltipped" data-position="top" data-tooltip="Dearchivia selezionati" Onclick="send('unarchive')"><i class="material-icons">unarchive</i></a></li>
-        <li><a class="tooltipped" data-position="top" data-tooltip="Scarica selezionati" Onclick="send('download')"><i class="material-icons">file_download</i></a></li>
+        <li><a class="tooltipped modal-trigger" href="#modal3" data-position="top" data-tooltip="Scarica selezionati" Onclick="send('download')"><i class="material-icons">file_download</i></a></li>
         {% if settings.DEBUG %}
           <li><a class="tooltipped" data-position="top" data-tooltip="Approva selezionati" Onclick="send('approve')"><i class="material-icons left">check</i>DEBUG</a></li>
           <li><a class="tooltipped" data-position="top" data-tooltip="Elimina selezionati" Onclick="send('delete')"><i class="material-icons left">delete</i>DEBUG</a></li>
@@ -65,6 +65,17 @@
   </div>
 </div>
 
+<div id="modal3" class="modal">
+  <div class="modal-content">
+    <h5>Preparazione dei documenti</h5>
+    <div class="progress">
+        <div id="progress_bar" class="indeterminate"></div>
+        <div class="determinate" style="width: 0%"></div>
+    </div>
+    <p id="progress_text"></p>
+  </div>
+</div>
+
 <form id="selection" action="{% url 'doclist' %}" method="post">
 {% csrf_token %}
 <div id="modal1" class="modal">
@@ -464,6 +475,11 @@ $(document).ready(function(){
     {% if error %}
       M.toast({html: '{{ error_text}}', classes: 'orange'})
     {% endif %}
+    {% if task_id %}
+      $('#modal3').modal('open');
+      update();
+      document.getElementById('progress_bar').className = "determinate";
+    {% endif %}
 });
 
 $('.chips').chips();
@@ -522,6 +538,37 @@ $('#chips_groups').chips({
   ]
 });
 
+function update() {
+  var box = document.getElementById('progress_text');
+  var bar = document.getElementById('progress_bar');
+  {% if task_id %}
+    var url = '{% url "progress" %}' + '?job=' + '{{task_id}}';
+  {% else %}
+    var url = '{% url "progress" %}';
+  {% endif %}
+  fetch(url).then(function(response) {
+    response.json().then(function(data) {
+      if (data[0] == data[1]) {
+        if (data[2]) {
+          bar.className = "indeterminate";
+          var url = '{% url "progress" %}' + '?job=' + '{{task_id}}' + '&download=true';
+          box.innerHTML = "Il download dovrebbe partire automaticamente. Nel caso non succedesse cliccare il seguente <a id='downloadLink' href=" + url + ">link</a>";
+          document.getElementById('downloadLink').click();
+
+        } else {
+          bar.style.width = "100%";
+          box.innerHTML = "Impacchettamento documenti...";
+          setTimeout(update, 500, url);
+        }
+      } else {
+        box.innerHTML = data[0] + "/" + data[1];
+        bar.style.width = data[0]/data[1]*100 + "%";
+        setTimeout(update, 500, url);
+      }
+    });
+  });
+}
+
 function send(id) {
   var form = document.getElementById('selection')
   var action = document.getElementById('action')
diff --git a/server/urls.py b/server/urls.py
index 0be590c..b744730 100644
--- a/server/urls.py
+++ b/server/urls.py
@@ -1,7 +1,8 @@
-from django.urls import path
+from django.urls import path, re_path, include
 
 from . import views
 
+
 urlpatterns = [
     path('', views.index, name='server'),
     path('uapprove', views.uapprove, name='uapprove'),
@@ -12,4 +13,5 @@ urlpatterns = [
     path('docapprove', views.docapprove, name='docapprove'),
     path('docupload', views.upload_doc, name='docupload'),
     path('docpreview', views.docpreview, name='docpreview'),
+    path('progress', views.get_progress, name='progress'),
 ]
diff --git a/server/views.py b/server/views.py
index 250feec..e8fbe8b 100644
--- a/server/views.py
+++ b/server/views.py
@@ -20,7 +20,11 @@ import os
 import base64
 from PIL import Image, UnidentifiedImageError
 import zipfile
+import json
+import threading
+import random
 
+progress = {}
 
 # custom staff check function for non primary group staff members
 def isStaff(user):
@@ -152,7 +156,6 @@ def docapprove(request):
         data = data.split("\n")
         # check if code valid
         for i in range(len(data)):
-            print(Document.objects.filter(code=data[i])[0].group.name)
             if not data[i].isdigit():
                 data[i] = data[i] + " - Formato errato"
             elif int(data[i]) < 100000 or int(data[i]) > 999999:
@@ -615,8 +618,6 @@ def doclist(request):
                 if docc.group.name in parent_groups:
                     selected.append(docc)
 
-        # create list of pdfs
-        files = []
         # execute action on selected documents
         for i in selected:
             if request.POST["action"] == 'delete' and settings.DEBUG:
@@ -641,48 +642,10 @@ def doclist(request):
                 else:
                     error = True
                     error_text = "Non puoi dearchiviare un documento non archiviato"
-            elif request.POST["action"] == "download":
-                vac_file = ""
-                health_file = ""
-                sign_doc_file = ""
-
-                # prepare pictures in base64
-                if i.medical_data:
-                    if i.medical_data.vac_certificate.name:
-                        with open(i.medical_data.vac_certificate.name, 'rb') as image_file:
-                            vac_file = base64.b64encode(
-                                image_file.read()).decode()
-
-                    if i.medical_data.health_care_certificate.name:
-                        with open(i.medical_data.health_care_certificate.name, 'rb') as image_file:
-                            health_file = base64.b64encode(
-                                image_file.read()).decode()
-                if i.signed_doc:
-                    with open(i.signed_doc.name, 'rb') as image_file:
-                        sign_doc_file = base64.b64encode(
-                            image_file.read()).decode()
-
-                template = get_template('server/download_doc.html')
-                doc = [i, KeyVal.objects.filter(
-                    container=i), i.personal_data, i.medical_data, i.user.groups.values_list('name', flat=True)[0]]
-                context = {'doc': doc, 'vac': vac_file,
-                           'health': health_file, 'sign_doc_file': sign_doc_file}
-                # render context
-                html = template.render(context)
-                # render pdf using wkhtmltopdf
-                pdf = pdfkit.from_string(html, False)
-                filename = i.user.username+"_"+i.document_type.name+".pdf"
-                files.append((filename, pdf))
-
-        if request.POST["action"] == "download":
-            mem_zip = BytesIO()
-
-            with zipfile.ZipFile(mem_zip, mode="w",compression=zipfile.ZIP_DEFLATED) as zf:
-                for f in files:
-                    zf.writestr(f[0], f[1])
 
-            mem_zip.seek(0)
-            return FileResponse(mem_zip, as_attachment=True, filename="documents_" + datetime.now().strftime("%H_%M-%d_%m_%y") + ".zip")
+        if len(selected) == 0:
+            error = True
+            error_text = "Seleziona almeno un documento"
 
         # get filter values
         hidden = "filter_hidden" in request.POST
@@ -824,8 +787,83 @@ def doclist(request):
         'error_text': error_text,
         'settings': settings,
     }
+
+    if request.method == "POST":
+        if request.POST["action"] == "download" and len(selected) > 0:
+            code = request.user.username + "_" + str(random.randint(100, 999))
+            progress[code] = [0, 0, False, request.user, None]
+            threading.Thread(target=zip_documents, args=(selected, code)).start()
+            context["task_id"] = code
+
     return render(request, 'server/doc_list.html', context)
 
+def get_progress(request):
+    if 'job' in request.GET:
+        job_id = request.GET['job']
+    else:
+        return HttpResponse(json.dumps({"error": True}))
+
+    if not job_id in progress.keys():
+        return HttpResponse(json.dumps({"error": "Lavoro non esistente. Provare a richiedere di nuovo il lavoro."}))
+
+    if 'download' in request.GET:
+        if progress[job_id][3] == request.user:
+            data = progress[job_id][4]
+            del progress[job_id]
+            return data
+    data = progress[job_id][:3]
+    return HttpResponse(json.dumps(data))
+
+def zip_documents(docs, code):
+    files = []
+    total = len(docs)
+    status = 0
+    progress[code][0] = status
+    progress[code][1] = total
+    for i in docs:
+        vac_file = ""
+        health_file = ""
+        sign_doc_file = ""
+
+        # prepare pictures in base64
+        if i.medical_data:
+            if i.medical_data.vac_certificate.name:
+                with open(i.medical_data.vac_certificate.name, 'rb') as image_file:
+                    vac_file = base64.b64encode(
+                        image_file.read()).decode()
+
+            if i.medical_data.health_care_certificate.name:
+                with open(i.medical_data.health_care_certificate.name, 'rb') as image_file:
+                    health_file = base64.b64encode(
+                        image_file.read()).decode()
+        if i.signed_doc:
+            with open(i.signed_doc.name, 'rb') as image_file:
+                sign_doc_file = base64.b64encode(
+                    image_file.read()).decode()
+
+        template = get_template('server/download_doc.html')
+        doc = [i, KeyVal.objects.filter(
+            container=i), i.personal_data, i.medical_data, i.user.groups.values_list('name', flat=True)[0]]
+        context = {'doc': doc, 'vac': vac_file,
+                    'health': health_file, 'sign_doc_file': sign_doc_file}
+        # render context
+        html = template.render(context)
+        # render pdf using wkhtmltopdf
+        pdf = pdfkit.from_string(html, False)
+        filename = i.user.username+"_"+i.document_type.name+".pdf"
+        files.append((filename, pdf))
+        status += 1
+        progress[code][0] = status
+
+    mem_zip = BytesIO()
+
+    with zipfile.ZipFile(mem_zip, mode="w",compression=zipfile.ZIP_DEFLATED) as zf:
+        for f in files:
+            zf.writestr(f[0], f[1])
+
+    mem_zip.seek(0)
+    progress[code][4] = FileResponse(mem_zip, as_attachment=True, filename="documents_" + datetime.now().strftime("%H_%M-%d_%m_%y") + ".zip")
+    progress[code][2] = True
 
 @user_passes_test(isStaff)
 def upload_doc(request):
-- 
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