1 files changed, 70 insertions, 0 deletions
diff --git a/server/protocol/src/book.rs b/server/protocol/src/book.rs
new file mode 100644
index 00000000..5bcd0a22
--- /dev/null
+++ b/server/protocol/src/book.rs
@@ -0,0 +1,70 @@
+/*
+    Hurry Curry! - a game about cooking
+    Copyright (C) 2025 Hurry Curry! Contributors
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, version 3 of the License only.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+*/
+
+use crate::Message;
+use bincode::{Decode, Encode};
+use glam::Vec2;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize, Encode, Decode)]
+pub struct Book {
+    pub pages: Vec<BookPage>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, Encode, Decode)]
+#[serde(rename_all = "snake_case", tag = "page_type")]
+pub enum BookPage {
+    Cover,
+    Contents {
+        table: Vec<(Message, usize)>,
+    },
+    Text {
+        paragraphs: Vec<Message>,
+    },
+    Recipe {
+        description: Message,
+        instruction: Message,
+        diagram: Diagram,
+    },
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, Encode, Decode, Default)]
+pub struct Diagram {
+    pub nodes: Vec<DiagramNode>,
+    pub edges: Vec<DiagramEdge>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, Encode, Decode)]
+pub struct DiagramNode {
+    #[bincode(with_serde)]
+    pub position: Vec2,
+    pub label: Message,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, Encode, Decode)]
+pub struct DiagramEdge {
+    pub src: usize,
+    pub dst: usize,
+    pub label: Option<Message>,
+}
+
+impl Default for Book {
+    fn default() -> Self {
+        Book { pages: vec![] }
+    }
+}