Serializing BookMeta removes hover and click events

This occurs on:

• Spigot 1.14.4
• CraftBukkit 1.14.4

And is not applicable to:

• Vanilla

Not tested:

• Spigot 1.14.3 and earlier

What happens

When you save an ItemStack of a book in a config the BookMeta does not get correctly serialized and removes hover and click events.

This is because CraftMetaBook#serialize() calls CraftChatMessage.fromComponent(IChatBaseComponent) which only returns a String containing the textual content and formatting.

Produced config file

item:   ==: org.bukkit.inventory.ItemStack
  v: 1976
  type: WRITTEN_BOOK
  meta:     ==: ItemMeta
    meta-type: BOOK_SIGNED
    title: Test Book
    author: Test Author
    pages:     - |-
      test click§0
      §0test hover§0
      §0test combined
    - this is page 2

Steps to reproduce

1. Place the BookConfigTest.jar in your plugins folder
2. Run this command from the console to get an example book

   minecraft:give @p written_book{pages:["[\"\",{\"text\":\"test click\",\"clickEvent\":{\"action\":\"run_command\",\"value\":\"/say test command\"}},\"\\n\",{\"text\":\"test hover\",\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"hover text\"}},\"\\n\",{\"text\":\"test combined\",\"clickEvent\":{\"action\":\"change_page\",\"value\":2},\"hoverEvent\":{\"action\":\"show_text\",\"value\":\"go to page 2\"}}]","{\"text\":\"this is page 2\"}"],title:"Test Book",author:"Test Author",display:{Lore:["This is a test book"]}}

3. Hold the given book in your main hand
4. Execute the following commands from the player holding the book
   1. /dotest set
   2. /dotest reload
   • (reloading needed because the correct item is cached otherwise)
5. When you execute /dotest get you will get a book that has the same name, author, generation and formatting but the hover and click events are gone.