Added component-based patch system (#5070)

common/links.h

@@ -3,9 +3,59 @@
 //
 
 #pragma once
+#include "item_instance.h"
+
+namespace EQ { class ItemInstance; }
 
 namespace Links
 {
-    constexpr char ITEM_TAG_CHAR = '\x12';
-    std::string FormatSpellLink(uint32_t SpellID, const std::string& SpellName);
+// Max Link Size in bytes
+constexpr size_t MAX_LINK_SIZE = 512;
+
+// Universal link tag character
+constexpr char ITEM_TAG_CHAR = '\x12';
+
+// Enumeration of different types of item tags
+enum ETagCodes
+{
+    ETAG_ITEM = 0,
+    ETAG_PLAYER,
+    ETAG_SPAM,
+    ETAG_ACHIEVEMENT,
+    ETAG_DIALOG_RESPONSE,
+    ETAG_COMMAND,
+    ETAG_SPELL,
+    ETAG_FACTION,
+    ETAG_COMMAND2,
+    ETAG_UNKNOWN9,
+
+    ETAG_COUNT,
+    ETAG_FIRST = ETAG_ITEM,
+    ETAG_LAST = ETAG_UNKNOWN9,
+
+    ETAG_INVALID = -1,
+};
+
+//----------------------------------------------------------------------------
+// Link Formatting -- Pulled from MQ code
+
+// Create an achievement link for the given achievement.
+// TODO: implement this when achievements are added, leave the signature here for reference. Code in eqlib's ItemLinks.cpp
+// void FormatAchievementLink(char* Buffer, size_t BufferSize, const Achievement* achievement,
+//     std::string_view playerName);
+
+// Create an item link from the given item.
+void FormatItemLink(char* Buffer, size_t BufferSize, const EQ::ItemInstance* item);
+
+// Create a spell link for the given spell, with optional spell name override. Spells on items often have
+// spell name overrides that changes the display name of the spell.
+void FormatSpellLink(char* Buffer, size_t BufferSize, uint32_t SpellID,
+    const char* spellNameOverride = nullptr);
+
+// Format text into a clickable dialog link. The keyword is the text that will be displayed in the chat window,
+// and the text is the text that will be sent to the server when the link is clicked. If no text is provided,
+// then the keyword will be used as the text.
+void FormatDialogLink(char* Buffer, size_t BufferSize, std::string_view keyword,
+    std::string_view text = {});
+
 }