friends: send friend requests

discord/discord.cpp

@@ -697,6 +697,25 @@ void DiscordClient::RemoveRelationship(Snowflake id, sigc::slot<void(bool succes
     });
 }
 
+void DiscordClient::SendFriendRequest(const Glib::ustring &username, int discriminator, sigc::slot<void(bool success, DiscordError code)> callback) {
+    FriendRequestObject obj;
+    obj.Username = username;
+    obj.Discriminator = discriminator;
+    m_http.MakePOST("/users/@me/relationships", nlohmann::json(obj).dump(), [this, callback](const http::response_type &response) {
+        if (CheckCode(response, 204)) {
+            callback(true, DiscordError::NONE);
+        } else {
+            auto code = DiscordError::GENERIC;
+            try {
+                // pull me somewhere else?
+                const auto data = nlohmann::json::parse(response.text);
+                data.at("code").get_to(code);
+            } catch (...) {}
+            callback(false, code);
+        }
+    });
+}
+
 bool DiscordClient::CanModifyRole(Snowflake guild_id, Snowflake role_id, Snowflake user_id) const {
     const auto guild = *GetGuild(guild_id);
     if (guild.OwnerID == user_id) return true;

discord/discord.hpp

@@ -139,6 +139,7 @@ public:
     void DeleteEmoji(Snowflake guild_id, Snowflake emoji_id, sigc::slot<void(bool success)> callback);
     std::optional<GuildApplicationData> GetGuildApplication(Snowflake guild_id) const;
     void RemoveRelationship(Snowflake id, sigc::slot<void(bool success)> callback);
+    void SendFriendRequest(const Glib::ustring &username, int discriminator, sigc::slot<void(bool success, DiscordError code)> callback);
 
     bool CanModifyRole(Snowflake guild_id, Snowflake role_id) const;
     bool CanModifyRole(Snowflake guild_id, Snowflake role_id, Snowflake user_id) const;

discord/errors.hpp

@@ -0,0 +1,36 @@
+#pragma once
+
+enum class DiscordError {
+    GENERIC = 0,
+    INVALID_FORM_BODY = 50035,
+    RELATIONSHIP_INCOMING_DISABLED = 80000,
+    RELATIONSHIP_INCOMING_BLOCKED = 80001,
+    RELATIONSHIP_INVALID_USER_BOT = 80002, // this is misspelled in discord's source lul
+    RELATIONSHIP_INVALID_SELF = 80003,
+    RELATIONSHIP_INVALID_DISCORD_TAG = 80004,
+    RELATIONSHIP_ALREADY_FRIENDS = 80007,
+
+    NONE = -1,
+};
+
+constexpr const char *GetDiscordErrorDisplayString(DiscordError error) {
+    switch (error) {
+        case DiscordError::INVALID_FORM_BODY:
+            return "Something's wrong with your input";
+        case DiscordError::RELATIONSHIP_INCOMING_DISABLED:
+            return "This user isn't accepting friend requests";
+        case DiscordError::RELATIONSHIP_INCOMING_BLOCKED:
+            return "You are blocked by this user";
+        case DiscordError::RELATIONSHIP_INVALID_USER_BOT:
+            return "You can't send a request to a bot";
+        case DiscordError::RELATIONSHIP_INVALID_SELF:
+            return "You can't send a request to yourself";
+        case DiscordError::RELATIONSHIP_INVALID_DISCORD_TAG:
+            return "No users with that tag exist";
+        case DiscordError::RELATIONSHIP_ALREADY_FRIENDS:
+            return "You are already friends with that user";
+        case DiscordError::GENERIC:
+        default:
+            return "An error occurred";
+    }
+}

discord/objects.cpp

@@ -463,3 +463,8 @@ void from_json(const nlohmann::json &j, RelationshipAddData &m) {
     JS_D("type", m.Type);
     JS_D("user", m.User);
 }
+
+void to_json(nlohmann::json &j, const FriendRequestObject &m) {
+    j["username"] = m.Username;
+    j["discriminator"] = m.Discriminator;
+}

discord/objects.hpp

@@ -19,6 +19,7 @@
 #include "ban.hpp"
 #include "auditlog.hpp"
 #include "relationship.hpp"
+#include "errors.hpp"
 
 // most stuff below should just be objects that get processed and thrown away immediately
 
@@ -645,3 +646,10 @@ struct RelationshipAddData {
 
     friend void from_json(const nlohmann::json &j, RelationshipAddData &m);
 };
+
+struct FriendRequestObject {
+    std::string Username;
+    int Discriminator;
+
+    friend void to_json(nlohmann::json &j, const FriendRequestObject &m);
+};