Update Jid

src/lib/jid.cpp

@@ -4,72 +4,144 @@ import fmt;
 
 namespace larra::xmpp {
 
-export struct Jid {
-  [[nodiscard]] static auto Parse(std::string_view jid) -> Jid {
-    Jid response;
+export struct BareJid;
+
+auto ParseBareJid(std::string_view, std::size_t) -> BareJid;
+
+export struct BareJid {
+  std::string username;
+  std::string server;
+
+  [[nodiscard]] friend auto ToString(const BareJid& jid) -> std::string {
+    return std::format("{}@{}", jid.username, jid.server);
+  }
+
+  template <typename Self>
+  [[nodiscard]] auto Username(this Self&& self, std::string username) -> BareJid {
+    return {std::move(username), std::forward_like<Self>(self.resource)};
+  }
+
+  template <typename Self>
+  [[nodiscard]] auto Server(this Self&& self, std::string server) -> BareJid {
+    return {std::forward_like<Self>(self.server), std::move(server)};
+  }
+
+  [[nodiscard]] static auto Parse(std::string_view jid) -> BareJid {
     const auto at = jid.find('@');
-    const auto slash = jid.find('/', at == std::string_view::npos ? 0 : at);
-
-    if(at != std::string_view::npos) {
-      response.username = jid.substr(0, at);
-      response.server = jid.substr(at + 1, (slash == std::string_view::npos ? jid.size() : slash) - (at + 1));
-    } else {
-      response.server = jid.substr(0, slash);
+    if(at == std::string_view::npos) {
+      throw std::invalid_argument("Invalid string for jid");
     }
 
-    if(slash != std::string_view::npos) {
-      response.resource = jid.substr(slash + 1);
+    return ParseBareJid(jid, at);
   }
+};
 
-    return response;
-  }
+auto ParseBareJid(std::string_view jid, std::size_t at) -> BareJid {
+  return {static_cast<std::string>(jid.substr(0, at)), static_cast<std::string>(jid.substr(at + 1))};
+}
 
-  template <typename Self>
-  [[nodiscard]] auto Username(this Self&& self, std::string username) -> Jid {
-    return {std::forward_like<Self>(self.server), std::move(username), std::forward_like<Self>(self.resource)};
-  }
+export struct BareResourceJid;
 
-  template <typename Self>
-  [[nodiscard]] auto Server(this Self&& self, std::string server) -> Jid {
-    return {std::move(server), std::forward_like<Self>(self.username), std::forward_like<Self>(self.resource)};
-  }
+auto ParseBareResourceJid(std::string_view, std::size_t) -> BareResourceJid;
 
-  template <typename Self>
-  [[nodiscard]] auto Resource(this Self&& self, std::string resource) -> Jid {
-    return {std::forward_like<Self>(self.server), std::forward_like<Self>(self.username), std::move(resource)};
-  }
+export struct BareResourceJid {
+  std::string server;
+  std::string resource;
 
-  [[nodiscard]] auto IsValid() const -> bool {
-    return this->server && this->username || this->resource;
-  }
-
-  [[nodiscard]] auto Username() const -> std::string_view {
-    return *this->username;
-  }
-
-  [[nodiscard]] auto Server() const -> std::string_view {
-    return *this->server;
-  }
-
-  [[nodiscard]] auto Resource() const -> std::string_view {
-    return *this->resource;
-  }
-
-  [[nodiscard]] explicit operator std::string() const {
-    if(!IsValid()) {
-      throw std::invalid_argument("Invalid jid obj");
-    }
-    return !this->username   ? std::format("{}/{}", *this->server, *this->resource)
-           : !this->resource ? std::format("{}@{}", *this->username, *this->server)
-                             : std::format("{}@{}/{}", *this->username, *this->server, *this->resource);
-  }
-  [[nodiscard]] auto ToString() const -> std::string {
-    return static_cast<std::string>(*this);
+  [[nodiscard]] friend auto ToString(const BareResourceJid& jid) -> std::string {
+    return std::format("{}/{}", jid.server, jid.resource);
   };
 
-  std::optional<std::string> server{};
-  std::optional<std::string> username{};
-  std::optional<std::string> resource{};
+  template <typename Self>
+  [[nodiscard]] auto Server(this Self&& self, std::string server) -> BareResourceJid {
+    return {std::move(server), std::forward_like<Self>(self.resource)};
+  };
+
+  template <typename Self>
+  [[nodiscard]] auto Resource(this Self&& self, std::string resource) -> BareResourceJid {
+    return {std::forward_like<Self>(self.server), std::move(resource)};
+  };
+
+  [[nodiscard]] static auto Parse(std::string_view jid) -> BareResourceJid {
+    const auto slash = jid.find('/');
+    if(slash == std::string_view::npos) {
+      throw std::invalid_argument("Invalid string for jid");
+    };
+
+    return ParseBareResourceJid(jid, slash);
+  };
+};
+
+auto ParseBareResourceJid(std::string_view jid, std::size_t slash) -> BareResourceJid {
+  return {static_cast<std::string>(jid.substr(0, slash)), static_cast<std::string>(jid.substr(slash + 1))};
+}
+
+export struct FullJid;
+
+auto ParseFullJid(std::string_view jid, std::size_t at, std::size_t slash) -> FullJid;
+
+export struct FullJid {
+  std::string username;
+  std::string server;
+  std::string resource;
+
+  [[nodiscard]] friend auto ToString(const FullJid& jid) -> std::string {
+    return std::format("{}@{}/{}", jid.username, jid.server, jid.resource);
+  };
+
+  template <typename Self>
+  [[nodiscard]] auto Username(this Self&& self, std::string username) -> FullJid {
+    return {std::move(username), std::forward_like<Self>(self.server), std::forward_like<Self>(self.resource)};
+  };
+
+  template <typename Self>
+  [[nodiscard]] auto Server(this Self&& self, std::string server) -> FullJid {
+    return {std::forward_like<Self>(self.username), std::move(server), std::forward_like<Self>(self.resource)};
+  };
+
+  template <typename Self>
+  [[nodiscard]] auto Resource(this Self&& self, std::string resource) -> FullJid {
+    return {std::forward_like<Self>(self.username), std::forward_like<Self>(self.server), std::move(resource)};
+  };
+
+  [[nodiscard]] static auto Parse(std::string_view jid) -> FullJid {
+    const auto at = jid.find('@');
+    const auto slash = jid.find('/', at);
+    if(at == std::string_view::npos || slash == std::string_view::npos) {
+      throw std::invalid_argument("Invalid string for jid");
+    };
+
+    return ParseFullJid(jid, at, slash);
+  };
+};
+
+auto ParseFullJid(std::string_view jid, std::size_t at, std::size_t slash) -> FullJid {
+  return {static_cast<std::string>(jid.substr(0, at)),
+          static_cast<std::string>(jid.substr(at + 1, slash - at - 1)),
+          static_cast<std::string>(jid.substr(slash + 1))};
+}
+using JidVariant = std::variant<BareJid, BareResourceJid, FullJid>;
+
+export struct Jid : JidVariant {
+  using JidVariant::variant;
+  [[nodiscard]] static auto Parse(std::string_view jid) -> Jid {
+    const auto at = jid.find('@');
+    const auto slash = jid.find('/', at == std::string_view::npos ? 0 : at);
+    if(at == std::string_view::npos) {
+      return ParseBareResourceJid(jid, slash);
+    }
+    if(slash == std::string_view::npos) {
+      return ParseBareJid(jid, at);
+    }
+    return ParseFullJid(jid, at, slash);
+  }
+  [[nodiscard]] friend auto ToString(const Jid& jid) -> std::string {
+    return std::visit<std::string>(
+        [](const auto& jid) -> std::string {
+          return ToString(jid);
+        },
+        jid);
+  };
 };
 
 }  // namespace larra::xmpp

src/lib/library.cpp

@@ -1,2 +1,2 @@
 export module larra.library;
-export import larra.jid;
+export import larra.library.jid;

tests/jid.cpp

@@ -6,32 +6,42 @@ import larra.library.jid;
 namespace larra::xmpp {
 
 TEST(Jid, Basic) {
-  auto jid = Jid{.username = "user"};
-  EXPECT_FALSE(jid.IsValid());
+  auto jid = FullJid{.username = "user"};
 
   const auto jid2 = std::move(jid).Server("server").Resource("resource");
-  EXPECT_EQ(jid2.Server(), "server");
-  EXPECT_EQ(jid2.Username(), "user");
-  EXPECT_EQ(jid2.Resource(), "resource");
+  EXPECT_EQ(jid2.server, "server");
+  EXPECT_EQ(jid2.username, "user");
+  EXPECT_EQ(jid2.resource, "resource");
 }
 
 TEST(Jid, Parse) {
   const auto jid = Jid::Parse("user@server/resource");
-  EXPECT_EQ(jid.Username(), "user");
-  EXPECT_EQ(jid.Server(), "server");
-  EXPECT_EQ(jid.Resource(), "resource");
+
+  EXPECT_TRUE(std::get_if<FullJid>(&jid));
+  const auto& fullJid = std::get<FullJid>(jid);
+  EXPECT_EQ(fullJid.username, "user");
+  EXPECT_EQ(fullJid.server, "server");
+  EXPECT_EQ(fullJid.resource, "resource");
+
   const auto jid2 = Jid::Parse("server/resource");
-  EXPECT_EQ(jid2.Server(), "server");
-  EXPECT_EQ(jid2.Resource(), "resource");
+
+  EXPECT_TRUE(std::get_if<BareResourceJid>(&jid2));
+  const auto& resourceJid = std::get<BareResourceJid>(jid2);
+  EXPECT_EQ(resourceJid.server, "server");
+  EXPECT_EQ(resourceJid.resource, "resource");
+
   const auto jid3 = Jid::Parse("user@server");
-  EXPECT_EQ(jid3.Username(), "user");
-  EXPECT_EQ(jid3.Server(), "server");
+
+  EXPECT_TRUE(std::get_if<BareJid>(&jid3));
+  const auto& bareJid = std::get<BareJid>(jid3);
+  EXPECT_EQ(bareJid.username, "user");
+  EXPECT_EQ(bareJid.server, "server");
 }
 
 TEST(Jid, ToString) {
-  EXPECT_EQ((Jid{.server = "server", .username = "user", .resource = "resource"}.ToString()), "user@server/resource");
-  EXPECT_EQ((Jid{.server = "server", .username = "user"}.ToString()), "user@server");
-  EXPECT_THROW(std::ignore = Jid{}.ToString(), std::invalid_argument);
+  EXPECT_EQ(ToString(FullJid{.username = "user", .server = "server", .resource = "resource"}), "user@server/resource");
+  EXPECT_EQ(ToString(BareJid{.username = "user", .server = "server"}), "user@server");
+  EXPECT_EQ(ToString(BareResourceJid{.server = "server", .resource = "resource"}), "server/resource");
 }
 
 }  // namespace larra::xmpp