Random image feature (refs #2958)

5 files changed, 66 insertions, 2 deletions

diff --git a/ishtar_common/models.py b/ishtar_common/models.py
index 4e46693de..087e772e7 100644
--- a/ishtar_common/models.py
+++ b/ishtar_common/models.py
@@ -954,7 +954,8 @@ class IshtarSiteProfile(models.Model, Cached):
     homepage = models.TextField(
         _(u"Home page"), null=True, blank=True,
         help_text=_(u"Homepage of Ishtar - if not defined a default homepage "
-                    u"will appear. Use the markdown syntax."))
+                    u"will appear. Use the markdown syntax. {random_image} "
+                    u"can be used to display a random image."))
     file_external_id = models.TextField(
         _(u"File external id"),
         default="{settings__ISHTAR_LOCAL_PREFIX}{year}-{numeric_reference}",
diff --git a/ishtar_common/static/media/style.css b/ishtar_common/static/media/style.css
index 7dd424974..c6a151dc8 100644
--- a/ishtar_common/static/media/style.css
+++ b/ishtar_common/static/media/style.css
@@ -920,6 +920,11 @@ a.photo{
     margin-right:auto;
 }
 
+.welcome-image{
+    padding: 1em;
+    text-align: center;
+}
+
 .dashboard table.resume th{
     text-align:center;
     padding:0.5em;
diff --git a/ishtar_common/templates/welcome.html b/ishtar_common/templates/welcome.html
index 42935d8f9..eb9de475e 100644
--- a/ishtar_common/templates/welcome.html
+++ b/ishtar_common/templates/welcome.html
@@ -2,6 +2,7 @@
 {% load url from future %}
 
 <h2>{% trans "Welcome in Ishtar, open source software for management and inventory of archaeological data" %}</h2>
+{{random_image}}
 <p>{% trans "Some useful links:" %}</p>
 <ul>
     <li><a href='https://ishtar-archeo.net' target="_blank">{% trans "Presentation site and blog" %}</a>{% trans ":"%} {% trans "stay tuned with Ishtar news!" %}</li>
diff --git a/ishtar_common/utils.py b/ishtar_common/utils.py
index d4973012e..cb45d32e1 100644
--- a/ishtar_common/utils.py
+++ b/ishtar_common/utils.py
@@ -17,9 +17,13 @@
 
 # See the file COPYING for details.
 
+import random
+
 from django.conf import settings
 from django.core.cache import cache
-from django.utils.translation import ugettext
+from django.core.urlresolvers import reverse
+from django.utils.safestring import mark_safe
+from django.utils.translation import ugettext_lazy as _, ugettext
 from django.template.defaultfilters import slugify
 
 
@@ -61,3 +65,50 @@ def shortify(lbl, number=20):
 def mode(array):
     most = max(list(map(array.count, array)))
     return list(set(filter(lambda x: array.count(x) == most, array)))
+
+
+def _get_image_link(item):
+    return mark_safe(u"""
+    <div class="welcome-image">
+        <img src="{}"/><br/>
+        <em>{} - {}</em>
+        <a href="#" onclick="load_window(\'{}\')">
+          <i class="fa fa-info-circle" aria-hidden="true"></i>
+        </a>
+        <a href="." title="{}">
+            <i class="fa fa-random" aria-hidden="true"></i>
+        </a><br/>
+    </div>""".format(
+        item.thumbnail.url,
+        unicode(item.__class__._meta.verbose_name),
+        unicode(item),
+        reverse(item.SHOW_URL, args=[item.pk, '']),
+        unicode(_(u"Load another random image?"))))
+
+
+def get_random_item_image_link():
+    from archaeological_operations.models import Operation
+    from archaeological_context_records.models import ContextRecord
+    from archaeological_finds.models import Find
+    ope_image_nb = Operation.objects.filter(image__isnull=False).count()
+    cr_image_nb = ContextRecord.objects.filter(image__isnull=False).count()
+    find_image_nb = Find.objects.filter(image__isnull=False).count()
+
+    image_total = ope_image_nb + cr_image_nb + find_image_nb
+    if not image_total:
+        return ''
+
+    image_nb = random.randint(0, image_total - 1)
+    if image_nb >= 0 and image_nb < ope_image_nb:
+        return _get_image_link(
+            Operation.objects.filter(image__isnull=False).all()[image_nb])
+    if image_nb >= ope_image_nb and image_nb < (cr_image_nb + ope_image_nb):
+        return _get_image_link(
+            ContextRecord.objects.filter(image__isnull=False).all()[
+                image_nb - ope_image_nb])
+    if image_nb >= (cr_image_nb + ope_image_nb):
+        return _get_image_link(
+            Find.objects.filter(image__isnull=False).all()[
+                image_nb - ope_image_nb - cr_image_nb])
+    # should never happen except in case of deletion during the excution
+    return ''
diff --git a/ishtar_common/views.py b/ishtar_common/views.py
index 79d3054b3..ea2eda462 100644
--- a/ishtar_common/views.py
+++ b/ishtar_common/views.py
@@ -62,6 +62,7 @@ from archaeological_operations.forms import DashboardForm as DashboardFormOpe
 from archaeological_files.forms import DashboardForm as DashboardFormFile
 
 from ishtar_common.forms import FinalForm, FinalDeleteForm
+from ishtar_common.utils import get_random_item_image_link
 from ishtar_common import forms_common as forms
 from ishtar_common import wizards
 from ishtar_common.models import HistoryError, PRIVATE_FIELDS, \
@@ -81,6 +82,11 @@ def index(request):
     profile = get_current_profile()
     if hasattr(profile, 'homepage') and profile.homepage:
         dct['homepage'] = markdown(profile.homepage)
+        if '{random_image}' in dct['homepage']:
+            dct['homepage'] = dct['homepage'].replace(
+                '{random_image}', get_random_item_image_link())
+    else:
+        dct['random_image'] = get_random_item_image_link()
     try:
         return render_to_response('index.html', dct,
                                   context_instance=RequestContext(request))