add: model

src/model.rs

@@ -1 +1,73 @@
-//! Base types matching SQL table structures.
+use serde::{Deserialize, Serialize};
+use tetratto_shared::{snow::Snowflake, unix_epoch_timestamp};
+
+#[derive(Serialize, Deserialize)]
+pub struct GroupChatInfo {
+    pub name: String,
+}
+
+#[derive(Serialize, Deserialize)]
+pub enum ChatStyle {
+    /// Direct messages between two users.
+    Direct,
+    /// Messages between a group of users (up to 10).
+    Group(GroupChatInfo),
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct Chat {
+    pub id: usize,
+    pub created: usize,
+    pub style: ChatStyle,
+    /// When the last member of the chat leaves, the chat will be deleted.
+    pub members: Vec<usize>,
+    pub last_message_created: usize,
+    /// The IDs of each user in the chat who read the last message.
+    ///
+    /// Will always have the ID of the user who sent the last message as index 0.
+    ///
+    /// The UI should show two checkmarks once this vector has a length of at least 2.
+    ///
+    /// Read receipts are stored by chat instead of message since it's easier to
+    /// keep up with if we store by chat instead. This will also declutter
+    /// the UI and prevent every message showing a read receipt.
+    pub last_message_read_by: Vec<usize>,
+}
+
+impl Chat {
+    /// Create a new [`Chat`].
+    pub fn new(style: ChatStyle, members: Vec<usize>) -> Self {
+        Self {
+            id: Snowflake::new().to_string().parse::<usize>().unwrap(),
+            created: unix_epoch_timestamp(),
+            style,
+            members,
+            last_message_created: 0,
+            last_message_read_by: Vec::new(),
+        }
+    }
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct Message {
+    pub id: usize,
+    pub created: usize,
+    pub owner: usize,
+    pub chat: usize,
+    pub content: String,
+    pub uploads: Vec<usize>,
+}
+
+impl Message {
+    /// Create a new [`Message`].
+    pub fn new(owner: usize, chat: usize, content: String, uploads: Vec<usize>) -> Self {
+        Self {
+            id: Snowflake::new().to_string().parse::<usize>().unwrap(),
+            created: unix_epoch_timestamp(),
+            owner,
+            chat,
+            content,
+            uploads,
+        }
+    }
+}