Show message pinned at the bottom of the window warning of cookie usage to comply with EU law (#1506)

* Add global variable to template_test

* Add global variable related to EU cookie law

* Add GetEUCookieFromRequest function that checks if the EU cookie exists (to comply with EU law)

* Add div at bottom of page if no EU cookie set

* add styling in css

* Prevent message from showing up any more than once

* prevent cookie from being erased by resetCookies() function

* Fix wrong function return type

* shorter condition

* Import timeHelper

* Update template_test.go

* remove variable name

* Update template_test.go

public/css/main.css

@@ -12,7 +12,9 @@ a {
     text-decoration: none;
 }
 
-body, .container, .modtools { min-width: 400px; }
+body, .container, .modtools {
+    min-width: 400px;
+}
 
 .header, .pagination {
     -webkit-user-select: none;
@@ -52,7 +54,7 @@ body {
     background-size: contain;
 }
 
-.header {
+.header, #cookie-warning {
     z-index: 3;
     position: fixed;
     width: 100%;
@@ -61,6 +63,15 @@ body {
     height: 60px;
     border-bottom: 1px solid;
 }
+.header.content-admin {
+    height: auto;
+}
+#cookie-warning {
+    top: initial;
+    bottom: 0;
+    background: hsla(200,90%,56%,0.2);
+    height: 40px;
+}
 
 .container, .modtools {
     max-width: 1111px;

public/js/main.js

@@ -87,7 +87,7 @@ parseAllDates()
 //called if no Commit cookie is set or if the website has a newer commit than the one in cookie
 function resetCookies() {
   var cookies = document.cookie.split(";")
-  var excludedCookies = ["mascot", "theme", "theme2", "mascot_url", "lang", "csrf_token", "altColors", "hideAds"]
+  var excludedCookies = ["mascot", "theme", "theme2", "mascot_url", "lang", "csrf_token", "altColors", "hideAds", "EU_Cookie"]
 
   //Remove all cookies but exclude those in the above array
   for (var i = 0; i < cookies.length; i++) {

templates/layouts/partials/base.jet.html

@@ -96,6 +96,7 @@
       </div>
     </footer>
   </div>
+  {{ if !EUCookieLaw }}<div id="cookie-warning">{{ T("cookie_warning") }}</div>{{ end }}
   <script type="text/javascript" charset="utf-8">var commitVersion = "{{ Config.Build }}", UserID = {{User.ID}};</script>
   <script type="text/javascript" src="/js/query.js?v={{ Config.Version}}{{ Config.Build }}"></script>
   <script type="text/javascript" charset="utf-8" src="/js/main.js?v={{ Config.Version }}{{ Config.Build }}" async></script>

templates/template.go

@@ -60,6 +60,7 @@ func Commonvariables(c *gin.Context) jet.VarMap {
 	variables.Set("User", user)
 	variables.Set("URL", c.Request.URL)
 	variables.Set("CsrfToken", token)
+	variables.Set("EUCookieLaw", publicSettings.GetEUCookieFromRequest(c))
 	variables.Set("Config", config.Get())
 	variables.Set("Infos", messages.GetAllInfos())
 	variables.Set("Errors", messages.GetAllErrors())

templates/template_test.go

@@ -288,6 +288,7 @@ func mockupCommonvariables(t *testing.T) jet.VarMap {
 	variables.Set("User", &models.User{})
 	variables.Set("URL", &url.URL{})
 	variables.Set("CsrfToken", "xxxxxx")
+	variables.Set("EUCookieLaw", false)
 	variables.Set("Config", config.Get())
 	variables.Set("Infos", make(map[string][]string))
 	variables.Set("Errors", make(map[string][]string))

utils/publicSettings/publicSettings.go

@@ -7,11 +7,13 @@ import (
 	"path"
 	"path/filepath"
 	"strings"
+	"net/http"
 
 	"sort"
 
 	"github.com/NyaaPantsu/nyaa/config"
 	"github.com/NyaaPantsu/nyaa/models"
+	"github.com/NyaaPantsu/nyaa/utils/timeHelper"
 	"github.com/gin-gonic/gin"
 	"github.com/nicksnyder/go-i18n/i18n"
 	"github.com/nicksnyder/go-i18n/i18n/language"
@@ -237,6 +239,18 @@ func GetMascotURLFromRequest(c *gin.Context) string {
 	return ""
 }
 
+func GetEUCookieFromRequest(c *gin.Context) bool {
+	_, err := c.Cookie("EU_Cookie")
+	if err == nil {
+		return true
+		//Cookie exists, everything good
+	}
+
+	http.SetCookie(c.Writer, &http.Cookie{Name: "EU_Cookie", Value: "true", Domain: getDomainName(), Path: "/", Expires: timeHelper.FewDaysLater(365)})	
+	return false
+	//Cookie doesn't exist, we create it to prevent the message from popping up anymore after that and return false
+}
+
 func getCurrentUser(c *gin.Context) (*models.User, error) {
 	if userRetriever == nil {
 		return &models.User{}, errors.New("failed to get current user: no user retriever set")
@@ -294,3 +308,11 @@ func Flag(languageCode string, parent bool) string {
 	}
 	return lang.String()
 }
+
+func getDomainName() string {
+	domain := config.Get().Cookies.DomainName
+	if config.Get().Environment == "DEVELOPMENT" {
+		domain = ""
+	}
+	return domain
+}