gmba_django/app/views.py

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import csv
import json
import time
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from django.contrib import messages
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from werkzeug.utils import secure_filename
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from django.views.generic.base import TemplateView, View
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from django.core.files.storage import default_storage
from django.core.files.base import ContentFile
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from django.core.paginator import Paginator
from django.http import FileResponse, HttpResponsePermanentRedirect, HttpResponse, JsonResponse
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from django.urls import reverse
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from django.shortcuts import get_object_or_404
import operator
from django.db.models import Q
from functools import reduce
import os.path as ospath
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from shutil import move
from os import makedirs
from tempfile import gettempdir
from .formats import *
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from .convert import reindex_data, refresh_data
from .models import Person, RangesPeople, TaxaPeople, FieldsPeople, MethodsPeople, Range, Field, Taxon, Resource
# Get temporary file storage
UPLOAD_PATH = gettempdir()
DATA_PATH = ospath.join(ospath.dirname(__file__), '..')
if not ospath.exists(DATA_PATH):
makedirs(DATA_PATH)
def get_datafile(fmt):
return ospath.join(
DATA_PATH,
fmt['folder'],
fmt['filename'] + '.' + fmt['extension']
)
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# Data update tracking
c_progress = 0
c_filename = ""
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class HomePageView(TemplateView):
template_name = "app/index.html"
def get_context_data(self, **kwargs):
fmts = DATAFORMATS
for f in fmts:
f['ready'] = ospath.isfile(get_datafile(f))
context = super().get_context_data(**kwargs)
return context
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class OfflinePageView(TemplateView):
template_name = "app/offline.html"
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
return context
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class DemoPageView(TemplateView):
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template_name = "app/demo.html"
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def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
return context
class ReindexPageView(TemplateView):
template_name = ""
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def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
return context
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def post(self, request, **kwargs):
global c_progress
c_progress = 0
global c_filename
c_filename = ""
reindex_data()
messages.add_message(request, messages.INFO, 'Search engine refresh complete')
print("Search engine reindexed")
return HttpResponsePermanentRedirect(reverse('admin:index'))
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class RefreshPageView(TemplateView):
template_name = ""
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
return context
def post(self, request):
global c_progress
c_progress = 0
def generate():
stats = []
total = 0
for fmt in DATAFORMATS:
global c_filename
c_filename = fmt['filename']
filename = get_datafile(fmt)
c = 1
c_counter = 0
rd = refresh_data(filename, fmt)
while c is not None:
try:
c, p = next(rd)
except Exception as e:
yield 'error: %s' % str(e)
#traceback.print_exc()
return
if isinstance(c, (int, float)):
global c_progress
c_counter = c
if isinstance(p, (int, float)):
c_progress = p
yield str(c) + "\n\n"
elif isinstance(p, str) and isinstance(c, str):
# Error condition
yield p + ": " + c + "\n\n"
return
stats.append({'format': fmt['dataformat'], 'count': c_counter})
print("Refresh: %d counted at %s" % (c_counter, fmt['dataformat']))
total = total + c_counter
yield "done: %d objects updated" % total
print("Refresh: %d objects updated" % total)
c_progress = 0
c_filename = ""
return HttpResponse(generate(), content_type='text/html')
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class ConfigurationPageView(TemplateView):
template_name = "app/admin/config.html"
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
return context
def post(self, request, **kwargs):
global c_progress
c_progress = 0
global c_filename
c_filename = ""
reindex_data()
messages.add_message(request, messages.INFO, 'Search engine refresh complete')
print("Search engine reindexed")
return HttpResponsePermanentRedirect(reverse('admin:index'))
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class ConfigurationHomePageView(TemplateView):
template_name = "app/admin/index.html"
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
return context
def get_paginated(query_set, page, per_page):
paginator = Paginator(query_set, per_page).page(page)
filters = {
'country': [],
'range': [],
'field': [],
'taxon': [],
}
for p in paginator.object_list:
filters['country'].append(p.country)
for r in p.rangespeople_set.all():
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filters['range'].append(r.range.name)
for r in p.fieldspeople_set.all():
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filters['field'].append(r.field.name)
for r in p.taxapeople_set.all():
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filters['taxon'].append(r.taxon.name)
filters = {
'country': sorted(set(filters['country'])),
'range': sorted(set(filters['range'])),
'field': sorted(set(filters['field'])),
'taxon': sorted(set(filters['taxon'])),
}
if len(query_set.all()) > len(paginator.object_list) and paginator.paginator.count == 1:
paginator.object_list = query_set.all()
paginator.count(len(paginator.object_list))
return_data = {
'items': [p.dict() for p in paginator.object_list],
'filters': filters,
'page': page, 'pages': paginator.paginator.num_pages, 'total': paginator.paginator.count,
'has_next': paginator.has_next(), 'has_prev': paginator.has_previous()
}
return return_data
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class SearchView(View):
def get(self, request):
page = int(self.request.GET.get('page', 1))
per_page = int(self.request.GET.get('per_page', 10))
q = self.request.GET.get('q', '').strip()
if not q or len(q) < 3:
query_set = Person.objects.all()
else:
query = reduce(operator.or_, (Q(field_indexer__icontains=item) for item in q.split(" ")))
query_set = Person.objects.filter(query)
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q_country = self.request.GET.get('country', '')
q_range = self.request.GET.get('range', '')
q_field = self.request.GET.get('field', '')
q_taxon = self.request.GET.get('taxon', '')
if len(q_country) > 2:
query_set = query_set.filter(country__icontains=q_country.strip().lower())
if len(q_range) > 2:
ranges_people = RangesPeople.objects.filter(range__name__icontains=q_range.strip().lower())
r_people_ids = [rp.person_id for rp in ranges_people]
query_set = query_set.filter(id__in=r_people_ids)
if len(q_field) > 2:
fields_people = FieldsPeople.objects.filter(field__name__icontains=q_field.strip().lower())
f_people_ids = [fp.person_id for fp in fields_people]
query_set = query_set.filter(id__in=f_people_ids)
if len(q_taxon) > 2:
taxa_people = TaxaPeople.objects.filter(taxon__name__icontains=q_taxon.strip().lower())
t_people_ids = [tp.person_id for tp in taxa_people]
query_set = query_set.filter(id__in=t_people_ids)
query_set = query_set.order_by('last_name')
return JsonResponse(get_paginated(query_set, page, per_page))
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class PeopleDetailView(View):
def get(self, request, people_id):
person = get_object_or_404(Person, id=people_id)
return_data = {
'data': person.dict(),
'resources': [r.dict() for r in person.resourcespeople_set.all()],
'ranges': [r.dict() for r in person.rangespeople_set.all()],
'fields': [r.name for r in person.fieldspeople_set.all()],
'methods': [r.name for r in person.methodspeople_set.all()],
'scales': [r.name for r in person.scalespeople_set.all()],
'taxa': [r.name for r in person.taxapeople_set.all()],
}
return JsonResponse(return_data)
class PeopleListView(View):
def get(self, request):
page = int(self.request.GET.get('page', 1))
per_page = int(self.request.GET.get('per_page', 10))
query_set = Person.objects.all().order_by('last_name')
return JsonResponse(get_paginated(query_set, page, per_page))
class ResourceListView(View):
def get(self, request):
page = int(self.request.GET.get('page', 1))
per_page = int(self.request.GET.get('per_page', 10))
query_set = Resource.objects.all().order_by('title')
return JsonResponse(get_paginated(query_set, page, per_page))
MAX_FILTER_RESULTS = 50
class RangesListView(View):
def get(self, request):
q = self.request.GET.get('q', '').strip()
if not q or len(q) < 3:
query_set = Range.objects.all().order_by('name')[:MAX_FILTER_RESULTS]
else:
query_set = Range.objects.filter(name__icontains=q.strip().lower())
return JsonResponse(list(query_set.values()), safe=False)
class FieldsListView(View):
def get(self, request):
q = self.request.GET.get('q', '').strip()
if not q or len(q) < 3:
query_set = Field.objects.all().order_by('name')[:MAX_FILTER_RESULTS]
else:
query_set = Field.objects.filter(name__icontains=q.strip().lower())
return JsonResponse(list(query_set.values()), safe=False)
class TaxaListView(View):
def get(self, request):
q = self.request.GET.get('q', '').strip()
if not q or len(q) < 3:
query_set = Taxon.objects.all().order_by('name')[:MAX_FILTER_RESULTS]
else:
query_set = Taxon.objects.filter(name__icontains=q.strip().lower())
return JsonResponse(list(query_set.values()), safe=False)
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class UploadView(TemplateView):
template_name = "app/admin/config.html"
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
return context
def get(self, request):
messages.add_message(request, messages.ERROR, 'Please select a valid file')
return HttpResponsePermanentRedirect(reverse('app:config'))
def post(self, request, **kwargs):
if 'datafile' in request.FILES:
fs = request.FILES['datafile']
fs_name = secure_filename(fs.name)
fs_path = default_storage.save(fs_name, ContentFile(fs.read()))
print('Uploading: %s' % fs_path)
# Validation
fmt = None
if fs_name.endswith('.csv'):
with open(fs_path, 'rt', encoding='utf-8', errors='ignore') as csvfile:
datareader = csv.DictReader(csvfile)
datalist = list(datareader)
fmt = detect_dataformat(datalist[0])
elif fs_name.endswith('.geojson'):
with open(fs_path, 'rt', encoding='utf-8', errors='ignore') as jsonfile:
jsondata = json.load(jsonfile)
fmt = detect_dataformat(jsondata['features'][0]['properties'])
# Loading
if fmt is not None:
fs_target = get_datafile(fmt)
move(fs_path, fs_target)
messages.add_message(request, message="Uploaded new data file %s" % fmt['filename'],
level=messages.SUCCESS)
else:
messages.add_message(request, message="Could not validate data format!", level=messages.ERROR)
else:
messages.add_message(request, message="Please select a valid file", level=messages.ERROR)
return HttpResponsePermanentRedirect(reverse('config'))
def get_progress(request):
global c_progress
global c_filename
def generate():
while 1:
p = str(100*c_progress)
print("progress = %s" % p)
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yield 'data: { "p":'+p+',"f":"'+c_filename+'"}\n\n'
time.sleep(1.0)
if c_filename == "":
return HttpResponse("{}", content_type='text/event-stream')
response = HttpResponse(generate(), content_type='text/event-stream')
response['X-Accel-Buffering'] = 'no'
return response
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def send_from_file(request, filename):
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request_for = ''
if request.path.startswith('/geodata'):
request_for = 'geodata'
elif request.path.startswith('/data'):
request_for = 'data'
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file_path = ospath.join(DATA_PATH, request_for, filename)
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file_to_send = open(file_path, 'rb')
response = FileResponse(file_to_send)
return response