implement the funcitonality of creating member lists in the member app

jdav_web/media/memberlists/memberlist_template.tex

@@ -0,0 +1,21 @@
+\documentclass{article}
+
+\usepackage{booktabs}
+\usepackage{cmbright}
+\usepackage[margin=1in,landscape]{geometry}
+
+\begin{document}
+\noindent
+{\LARGE\textsc{MEMBERLIST-TITLE}}\\
+\textit{Erstellt: MEMBERLIST-DATE}\\
+MEMBERLIST-COMMENTS
+\begin{table}[h]
+  \begin{tabular}{llll}
+    \toprule
+    Name & Vorname & Geburtsdatum & Kommentare \\
+    \midrule
+    \input{TABLE-NAME}
+    \bottomrule
+  \end{tabular}
+\end{table}
+\end{document}

jdav_web/members/admin.py

@@ -1,6 +1,19 @@
+from datetime import datetime
+import glob
+import os
+import subprocess
+import shutil
+import time
+
+from django.http import HttpResponse
+from wsgiref.util import FileWrapper
+from django import forms
 from django.contrib import admin
+from django.utils.translation import ugettext_lazy as translate
+from django.db.models import TextField
+from django.forms import Textarea
 
-from .models import Member, Group
+from .models import Member, Group, MemberList, MemberOnList
 
 
 # Register your models here.
@@ -14,6 +27,96 @@ class GroupAdmin(admin.ModelAdmin):
     fields = ['name', 'min_age']
     list_display = ('name', 'min_age')
 
+class MemberListAdminForm(forms.ModelForm):
+    class Meta:
+        model = MemberList
+        exclude = ['add_member']
+
+    def __init__(self, *args, **kwargs):
+        super(MemberListAdminForm, self).__init__(*args, **kwargs)
+        if self.instance.pk:
+            pass
+            #self.fields['add_member'].queryset = Member.objects.filter(prename__startswith='F')
+
+class MemberOnListInline(admin.StackedInline):
+    model = MemberOnList
+    extra = 0
+    formfield_overrides = {
+    TextField: {'widget': Textarea(
+                           attrs={'rows': 1,
+                                  'cols': 40})},
+    }
+
+class MemberListAdmin(admin.ModelAdmin):
+    form = MemberListAdminForm
+    actions = ['convert_to_pdf']
+    inlines = [MemberOnListInline]
+
+    def convert_to_pdf(self, request, queryset):
+        """Converts a member list to pdf.
+
+        """
+        for memberlist in queryset:
+            # build a unique filename
+            filename = memberlist.name + "_" + datetime.today().strftime("%d_%m_%Y")
+            filename = filename.replace(' ', '_')
+ 
+            filename_table = 'table_' + filename
+            filename_tex = filename + '.tex'
+            filename_pdf = filename + '.pdf'
+
+            # open temporary file for table
+            with open('media/memberlists/'+filename_table, 'w+') as f:
+                for memberonlist in memberlist.memberonlist_set.all():
+                    # write table of members in latex compatible format
+                    line = '{0} & {1} & {2} & {3} \\\\ \n'.format(memberonlist.member.prename,
+                            memberonlist.member.lastname,
+                            memberonlist.member.birth_date.strftime('%d.%m.%Y'), memberonlist.comments)
+                    f.write(line) 
+            
+            # copy and adapt latex memberlist template
+            shutil.copy('media/memberlists/memberlist_template.tex',
+                        'media/memberlists/'+filename_tex)
+
+            # read in template
+            with open('media/memberlists/'+filename_tex, 'r') as f:
+                template_content = f.read()
+            
+            # adapt template
+            template_content = template_content.replace('MEMBERLIST-TITLE', memberlist.name)
+            template_content = template_content.replace('MEMBERLIST-DATE',
+                    memberlist.date.strftime('%d.%m.%Y'))
+            template_content = template_content.replace('MEMBERLIST-COMMENTS',
+                    memberlist.comment)
+            template_content = template_content.replace('TABLE-NAME',
+                    filename_table)
+            # write adapted template to file
+            with open('media/memberlists/' + filename_tex, 'w') as f:
+                f.write(template_content)
+
+            # compile using pdflatex
+            oldwd = os.getcwd()
+            os.chdir('media/memberlists')
+            subprocess.call(['pdflatex', filename_tex])
+            time.sleep(1)
+
+            # do some cleanup
+            for f in glob.glob('*.log'):
+                os.remove(f)
+            for f in glob.glob('*.aux'):
+                os.remove(f)
+            os.remove(filename_tex)
+            os.remove(filename_table)
+
+            os.chdir(oldwd)
+
+            # provide the user with the resulting pdf file
+            with open('media/memberlists/'+filename_pdf, 'rb') as pdf:
+                response = HttpResponse(FileWrapper(pdf))#, content='application/pdf')
+                response['Content-Disposition'] = 'attachment; filename='+filename_pdf
+
+            return response
 
 admin.site.register(Member, MemberAdmin)
 admin.site.register(Group, GroupAdmin)
+admin.site.register(MemberList, MemberListAdmin)

jdav_web/members/models.py

@@ -1,3 +1,4 @@
+from datetime import datetime
 from django.db import models
 from django.utils.translation import ugettext_lazy as _
 
@@ -43,3 +44,22 @@ class Member(models.Model):
     class Meta:
         verbose_name = _('member')
         verbose_name_plural = _('members')
+
+class MemberList(models.Model):
+    """Lets the user create a list of members in pdf format. """
+    name = models.CharField(verbose_name='List Name', default='', max_length=50)
+    date = models.DateField(default=datetime.today)
+    comment = models.TextField(_('Comments'), default='')
+
+    def __str__(self):
+        """String represenation"""
+        return self.name
+
+
+class MemberOnList(models.Model):
+    """
+    Connects members to a list of members.
+    """
+    member = models.ForeignKey(Member)
+    memberlist = models.ForeignKey(MemberList) 
+    comments = models.TextField(_('Comment'), default='')