From 6060adf9d06eb40b5909acd776ce53949bd786ec Mon Sep 17 00:00:00 2001
From: Étienne Loks <etienne.loks@iggdrasil.net>
Date: Tue, 25 Sep 2018 20:08:11 +0200
Subject: Allow to hide welcome message (refs #3842)

---
 chimere/static/saclay/js/interface.js         | 83 +++++++++++++++++++++++++++
 chimere/templates/chimere/blocks/welcome.html |  7 ++-
 chimere/templatetags/chimere_tags.py          |  5 ++
 3 files changed, 94 insertions(+), 1 deletion(-)

diff --git a/chimere/static/saclay/js/interface.js b/chimere/static/saclay/js/interface.js
index e593588..a86d29d 100644
--- a/chimere/static/saclay/js/interface.js
+++ b/chimere/static/saclay/js/interface.js
@@ -1,6 +1,89 @@
 var msg_edit_route = "Cliquez sur la carte pour tracer le trajet. Chaque nouveau clic rajoute un nœud. Double-cliquez pour terminer le trajet.<br/>Pour modifier le trajet sélectionnez un nœud puis glissez-déposez pour le déplacer.";
 var msg_edit = "Cliquez sur la carte pour placer le lieu. Pour modifier ce lieu sélectionnez-le puis glissez-déposez pour le déplacer.";
 
+
+var storageAvailable = function (type) {
+    try {
+        var storage = window[type],
+            x = '__storage_test__';
+        storage.setItem(x, x);
+        storage.removeItem(x);
+        return true;
+    }
+    catch(e) {
+        return e instanceof DOMException && (
+            // everything except Firefox
+            e.code === 22 ||
+            // Firefox
+            e.code === 1014 ||
+            // test name field too, because code might not be present
+            // everything except Firefox
+            e.name === 'QuotaExceededError' ||
+            // Firefox
+            e.name === 'NS_ERROR_DOM_QUOTA_REACHED') &&
+            // acknowledge QuotaExceededError only if there's something already stored
+            storage.length !== 0;
+    }
+}
+
+function setCookie(cname, cvalue, exdays) {
+    var d = new Date();
+    d.setTime(d.getTime() + (exdays*24*60*60*1000));
+    var expires = "expires="+ d.toUTCString();
+    document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
+}
+
+function getCookie(cname) {
+    var name = cname + "=";
+    var decodedCookie = decodeURIComponent(document.cookie);
+    var ca = decodedCookie.split(';');
+    for(var i = 0; i <ca.length; i++) {
+        var c = ca[i];
+        while (c.charAt(0) == ' ') {
+            c = c.substring(1);
+        }
+        if (c.indexOf(name) == 0) {
+            return c.substring(name.length, c.length);
+        }
+    }
+    return "";
+}
+
+
+var do_display_welcome = function(){
+    if (storageAvailable('localStorage')) {
+        if (localStorage.getItem('chimere-hide-welcome') != 'true'){
+            return true;
+        }
+        return false;
+    } else {
+        if (getCookie("chimere-hide-welcome") != 'true'){
+           return true;
+        }
+       return false;
+    }
+}
+
+
+var register_hide_welcome_check = function(){
+    $('#hide-welcome').click(function(){
+        if($("#hide-welcome:checked").length){
+            if (storageAvailable('localStorage')) {
+                localStorage.setItem('chimere-hide-welcome', 'true');
+            } else {
+                setCookie("chimere-hide-welcome", 'true', 36);
+            }
+        } else {
+            if (storageAvailable('localStorage')) {
+                localStorage.setItem('chimere-hide-welcome', 'false');
+            } else {
+                setCookie("chimere-hide-welcome", 'false', 36);
+            }
+        }
+    });
+
+};
+
 var register_subactions = function(){
     $('.subactions').click(function(){
         var link = $(this).attr("data-link");
diff --git a/chimere/templates/chimere/blocks/welcome.html b/chimere/templates/chimere/blocks/welcome.html
index 4e48c34..12ce4bb 100644
--- a/chimere/templates/chimere/blocks/welcome.html
+++ b/chimere/templates/chimere/blocks/welcome.html
@@ -5,12 +5,17 @@
 <script type='text/javascript'>
 <!--
 $(function(){
-    {% if display %}$('#welcome').modal('show');{%endif%}
+    {% if display %}
+    if (do_display_welcome()){
+        $('#welcome').modal('show');
+    }
+    {% endif %}
     $('.get_more_information').click(function(){
         $('#welcome').modal('hide');
         $('#news').modal('show');
         return false;
     });
+    register_hide_welcome_check();
 });
 // -->
 </script>
diff --git a/chimere/templatetags/chimere_tags.py b/chimere/templatetags/chimere_tags.py
index 4ed6183..b5ca51b 100644
--- a/chimere/templatetags/chimere_tags.py
+++ b/chimere/templatetags/chimere_tags.py
@@ -89,6 +89,11 @@ def display_welcome(context, display=False, title=''):
             area = Area.objects.get(urn=context["area_name"])
             context_data['area_name'] = context['area_name']
             context_data['welcome_message'] = area.welcome_message
+            context_data['welcome_message'] += """
+            <hr>
+            <input type='checkbox' id='hide-welcome'>
+            &nbsp;<label class='classic' for="hide-welcome">{}</label>
+            """.format(_("Stop displaying the greeting"))
         except ObjectDoesNotExist:
             pass
     else:
-- 
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