Move environment variable parsing and storage to its own class

Make the Link resolver and Twitch emotes set resolver urls modifiable with
environment variables

chatterino.pro

@@ -55,6 +55,7 @@ SOURCES += \
     src/common/Channel.cpp \
     src/common/CompletionModel.cpp \
     src/common/DownloadManager.cpp \
+    src/common/Env.cpp \
     src/common/LinkParser.cpp \
     src/common/NetworkData.cpp \
     src/common/NetworkManager.cpp \

docs/ENV.md

@@ -1,8 +1,20 @@
 # Environment variables
 Below I have tried to list all environment variables that can be used to modify the behaviour of Chatterino. Used for things that I don't feel like fit in the settings system.
 
-## CHATTERINO2_RECENT_MESSAGES_URL
+### CHATTERINO2_RECENT_MESSAGES_URL
 Used to change the URL that Chatterino2 uses when trying to load historic Twitch chat messages (if the setting is enabled).  
-Default value: `"https://recent-messages.robotty.de/api/v2/recent-messages/%1?clearchatToNotice=true"`  
+Default value: `https://recent-messages.robotty.de/api/v2/recent-messages/%1?clearchatToNotice=true`  
 Arguments:  
-1) `%1` = Name of the Twitch channel
+ - `%1` = Name of the Twitch channel
+
+### CHATTERINO2_LINK_RESOLVER_URL
+Used to change the URL that Chatterino2 uses when trying to get link information to display in the tooltip on hover.  
+Default value: `https://braize.pajlada.com/chatterino/link_resolver/%1`  
+Arguments:  
+ - `%1` = Escaped URL the link resolver should resolve
+
+### CHATTERINO2_TWITCH_EMOTE_SET_RESOLVER_URL
+Used to change the URL that Chatterino2 uses when trying to get emote set information
+Default value: `https://braize.pajlada.com/chatterino/twitchemotes/set/%1/`  
+Arguments:  
+ - `%1` = Emote set ID

src/providers/LinkResolver.cpp

@@ -1,6 +1,7 @@
 #include "providers/LinkResolver.hpp"
 
 #include "common/Common.hpp"
+#include "common/Env.hpp"
 #include "common/NetworkRequest.hpp"
 #include "messages/Link.hpp"
 #include "singletons/Settings.hpp"
@@ -17,11 +18,10 @@ void LinkResolver::getLinkInfo(
         successCallback("No link info loaded", Link(Link::Url, url));
         return;
     }
-    QString requestUrl("https://braize.pajlada.com/chatterino/link_resolver/" +
-                       QUrl::toPercentEncoding(url, "", "/:"));
     // Uncomment to test crashes
     // QTimer::singleShot(3000, [=]() {
-    NetworkRequest request(requestUrl);
+    NetworkRequest request(Env::get().linkResolverUrl.arg(
+        QString::fromUtf8(QUrl::toPercentEncoding(url, "", "/:"))));
     request.setCaller(QThread::currentThread());
     request.setTimeout(30000);
     request.onSuccess([successCallback, url](auto result) mutable -> Outcome {

src/providers/twitch/TwitchAccount.cpp

@@ -3,6 +3,7 @@
 #include <QThread>
 
 #include "Application.hpp"
+#include "common/Env.hpp"
 #include "common/NetworkRequest.hpp"
 #include "common/Outcome.hpp"
 #include "debug/Log.hpp"
@@ -534,9 +535,7 @@ void TwitchAccount::loadEmoteSetData(std::shared_ptr<EmoteSet> emoteSet)
         return;
     }
 
-    NetworkRequest req(
-        "https://braize.pajlada.com/chatterino/twitchemotes/set/" +
-        emoteSet->key + "/");
+    NetworkRequest req(Env::get().twitchEmoteSetResolverUrl.arg(emoteSet->key));
     req.setUseQuickLoadCache(true);
 
     req.onError([](int errorCode) -> bool {

src/providers/twitch/TwitchChannel.cpp

@@ -2,6 +2,7 @@
 
 #include "Application.hpp"
 #include "common/Common.hpp"
+#include "common/Env.hpp"
 #include "common/NetworkRequest.hpp"
 #include "controllers/accounts/AccountController.hpp"
 #include "controllers/notifications/NotificationController.hpp"
@@ -607,19 +608,8 @@ void TwitchChannel::loadRecentMessages()
         return;
     }
 
-    static QString genericURL = [] {
-        QString url("https://recent-messages.robotty.de/api/v2/recent-messages/"
-                    "%1?clearchatToNotice=true");
-        auto envString = std::getenv("CHATTERINO2_RECENT_MESSAGES_URL");
-        if (envString != nullptr)
-        {
-            url = envString;
-        }
-
-        return url;
-    }();
-
-    NetworkRequest request(genericURL.arg(this->getName()));
+    NetworkRequest request(
+        Env::get().recentMessagesApiUrl.arg(this->getName()));
     request.setCaller(QThread::currentThread());
     // can't be concurrent right now due to SignalVector
     //    request.setExecuteConcurrently(true);