add: user ads

crates/core/src/model/economy.rs

@@ -104,6 +104,10 @@ pub enum CoinTransferSource {
     Purchase,
     /// A refund of coins.
     Refund,
+    /// The charge for keeping an ad running.
+    AdCharge,
+    /// Gained coins from a click on an ad on your site.
+    AdClick,
 }
 
 #[derive(Serialize, Deserialize)]
@@ -149,3 +153,69 @@ impl CoinTransfer {
         (sender.coins < 0, receiver.coins < 0)
     }
 }
+
+/// <https://en.wikipedia.org/wiki/Web_banner#Standard_sizes>
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
+pub enum UserAdSize {
+    /// 970x250
+    Billboard,
+    /// 720x90
+    Leaderboard,
+    /// 160x600
+    Skyscraper,
+    /// 300x250
+    MediumRectangle,
+    /// 320x50 - mobile only
+    MobileLeaderboard,
+}
+
+impl Default for UserAdSize {
+    fn default() -> Self {
+        Self::MediumRectangle
+    }
+}
+
+impl UserAdSize {
+    /// Get the dimensions of the size in CSS pixels.
+    pub fn dimensions(&self) -> (u16, u16) {
+        match self {
+            Self::Billboard => (970, 250),
+            Self::Leaderboard => (720, 90),
+            Self::Skyscraper => (160, 600),
+            Self::MediumRectangle => (300, 250),
+            Self::MobileLeaderboard => (320, 50),
+        }
+    }
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct UserAd {
+    pub id: usize,
+    pub created: usize,
+    pub owner: usize,
+    pub upload_id: usize,
+    pub target: String,
+    /// The time that the owner was last charged for keeping this ad up.
+    ///
+    /// Ads cost 50 coins per day of running.
+    pub last_charge_time: usize,
+    pub is_running: bool,
+    pub size: UserAdSize,
+}
+
+impl UserAd {
+    /// Create a new [`UserAd`].
+    pub fn new(owner: usize, upload_id: usize, target: String, size: UserAdSize) -> Self {
+        let created = unix_epoch_timestamp();
+        Self {
+            id: 0, // will be overwritten by postgres
+            created,
+            owner,
+            upload_id,
+            target,
+            last_charge_time: 0,
+            is_running: false,
+            size,
+        }
+    }
+}