1 files changed, 250 insertions, 0 deletions
diff --git a/externals/discord-rpc/src/serialization.cpp b/externals/discord-rpc/src/serialization.cpp
new file mode 100644
index 0000000000..70efa637f3
--- /dev/null
+++ b/externals/discord-rpc/src/serialization.cpp
@@ -0,0 +1,250 @@
+#include "serialization.h"
+#include "connection.h"
+#include "discord_rpc.h"
+
+template <typename T>
+void NumberToString(char* dest, T number)
+{
+    if (!number) {
+        *dest++ = '0';
+        *dest++ = 0;
+        return;
+    }
+    if (number < 0) {
+        *dest++ = '-';
+        number = -number;
+    }
+    char temp[32];
+    int place = 0;
+    while (number) {
+        auto digit = number % 10;
+        number = number / 10;
+        temp[place++] = '0' + (char)digit;
+    }
+    for (--place; place >= 0; --place) {
+        *dest++ = temp[place];
+    }
+    *dest = 0;
+}
+
+// it's ever so slightly faster to not have to strlen the key
+template <typename T>
+void WriteKey(JsonWriter& w, T& k)
+{
+    w.Key(k, sizeof(T) - 1);
+}
+
+struct WriteObject {
+    JsonWriter& writer;
+    WriteObject(JsonWriter& w)
+      : writer(w)
+    {
+        writer.StartObject();
+    }
+    template <typename T>
+    WriteObject(JsonWriter& w, T& name)
+      : writer(w)
+    {
+        WriteKey(writer, name);
+        writer.StartObject();
+    }
+    ~WriteObject() { writer.EndObject(); }
+};
+
+struct WriteArray {
+    JsonWriter& writer;
+    template <typename T>
+    WriteArray(JsonWriter& w, T& name)
+      : writer(w)
+    {
+        WriteKey(writer, name);
+        writer.StartArray();
+    }
+    ~WriteArray() { writer.EndArray(); }
+};
+
+template <typename T>
+void WriteOptionalString(JsonWriter& w, T& k, const char* value)
+{
+    if (value && value[0]) {
+        w.Key(k, sizeof(T) - 1);
+        w.String(value);
+    }
+}
+
+static void JsonWriteNonce(JsonWriter& writer, int nonce)
+{
+    WriteKey(writer, "nonce");
+    char nonceBuffer[32];
+    NumberToString(nonceBuffer, nonce);
+    writer.String(nonceBuffer);
+}
+
+size_t JsonWriteRichPresenceObj(char* dest,
+                                size_t maxLen,
+                                int nonce,
+                                int pid,
+                                const DiscordRichPresence* presence)
+{
+    JsonWriter writer(dest, maxLen);
+
+    {
+        WriteObject top(writer);
+
+        JsonWriteNonce(writer, nonce);
+
+        WriteKey(writer, "cmd");
+        writer.String("SET_ACTIVITY");
+
+        {
+            WriteObject args(writer, "args");
+
+            WriteKey(writer, "pid");
+            writer.Int(pid);
+
+            if (presence != nullptr) {
+                WriteObject activity(writer, "activity");
+
+                WriteOptionalString(writer, "state", presence->state);
+                WriteOptionalString(writer, "details", presence->details);
+
+                if (presence->startTimestamp || presence->endTimestamp) {
+                    WriteObject timestamps(writer, "timestamps");
+
+                    if (presence->startTimestamp) {
+                        WriteKey(writer, "start");
+                        writer.Int64(presence->startTimestamp);
+                    }
+
+                    if (presence->endTimestamp) {
+                        WriteKey(writer, "end");
+                        writer.Int64(presence->endTimestamp);
+                    }
+                }
+
+                if ((presence->largeImageKey && presence->largeImageKey[0]) ||
+                    (presence->largeImageText && presence->largeImageText[0]) ||
+                    (presence->smallImageKey && presence->smallImageKey[0]) ||
+                    (presence->smallImageText && presence->smallImageText[0])) {
+                    WriteObject assets(writer, "assets");
+                    WriteOptionalString(writer, "large_image", presence->largeImageKey);
+                    WriteOptionalString(writer, "large_text", presence->largeImageText);
+                    WriteOptionalString(writer, "small_image", presence->smallImageKey);
+                    WriteOptionalString(writer, "small_text", presence->smallImageText);
+                }
+
+                if ((presence->partyId && presence->partyId[0]) || presence->partySize ||
+                    presence->partyMax || presence->partyPrivacy) {
+                    WriteObject party(writer, "party");
+                    WriteOptionalString(writer, "id", presence->partyId);
+                    if (presence->partySize && presence->partyMax) {
+                        WriteArray size(writer, "size");
+                        writer.Int(presence->partySize);
+                        writer.Int(presence->partyMax);
+                    }
+
+                    if (presence->partyPrivacy) {
+                        WriteKey(writer, "privacy");
+                        writer.Int(presence->partyPrivacy);
+                    }
+                }
+
+                if ((presence->matchSecret && presence->matchSecret[0]) ||
+                    (presence->joinSecret && presence->joinSecret[0]) ||
+                    (presence->spectateSecret && presence->spectateSecret[0])) {
+                    WriteObject secrets(writer, "secrets");
+                    WriteOptionalString(writer, "match", presence->matchSecret);
+                    WriteOptionalString(writer, "join", presence->joinSecret);
+                    WriteOptionalString(writer, "spectate", presence->spectateSecret);
+                }
+
+                writer.Key("instance");
+                writer.Bool(presence->instance != 0);
+            }
+        }
+    }
+
+    return writer.Size();
+}
+
+size_t JsonWriteHandshakeObj(char* dest, size_t maxLen, int version, const char* applicationId)
+{
+    JsonWriter writer(dest, maxLen);
+
+    {
+        WriteObject obj(writer);
+        WriteKey(writer, "v");
+        writer.Int(version);
+        WriteKey(writer, "client_id");
+        writer.String(applicationId);
+    }
+
+    return writer.Size();
+}
+
+size_t JsonWriteSubscribeCommand(char* dest, size_t maxLen, int nonce, const char* evtName)
+{
+    JsonWriter writer(dest, maxLen);
+
+    {
+        WriteObject obj(writer);
+
+        JsonWriteNonce(writer, nonce);
+
+        WriteKey(writer, "cmd");
+        writer.String("SUBSCRIBE");
+
+        WriteKey(writer, "evt");
+        writer.String(evtName);
+    }
+
+    return writer.Size();
+}
+
+size_t JsonWriteUnsubscribeCommand(char* dest, size_t maxLen, int nonce, const char* evtName)
+{
+    JsonWriter writer(dest, maxLen);
+
+    {
+        WriteObject obj(writer);
+
+        JsonWriteNonce(writer, nonce);
+
+        WriteKey(writer, "cmd");
+        writer.String("UNSUBSCRIBE");
+
+        WriteKey(writer, "evt");
+        writer.String(evtName);
+    }
+
+    return writer.Size();
+}
+
+size_t JsonWriteJoinReply(char* dest, size_t maxLen, const char* userId, int reply, int nonce)
+{
+    JsonWriter writer(dest, maxLen);
+
+    {
+        WriteObject obj(writer);
+
+        WriteKey(writer, "cmd");
+        if (reply == DISCORD_REPLY_YES) {
+            writer.String("SEND_ACTIVITY_JOIN_INVITE");
+        }
+        else {
+            writer.String("CLOSE_ACTIVITY_JOIN_REQUEST");
+        }
+
+        WriteKey(writer, "args");
+        {
+            WriteObject args(writer);
+
+            WriteKey(writer, "user_id");
+            writer.String(userId);
+        }
+
+        JsonWriteNonce(writer, nonce);
+    }
+
+    return writer.Size();
+}