From 11ba5c3d7e039c3c092e45fdd55c0c6a9e144842 Mon Sep 17 00:00:00 2001
From: Curly Bryce <curlybryce@protonmail.com>
Date: Wed, 3 Jul 2024 19:50:40 -0600
Subject: transfers

---
 src/db.rs | 44 ++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 40 insertions(+), 4 deletions(-)

(limited to 'src/db.rs')

diff --git a/src/db.rs b/src/db.rs
index a6ca7b0..85e259b 100644
--- a/src/db.rs
+++ b/src/db.rs
@@ -17,7 +17,7 @@ impl Config {
     }
 }
 
-#[derive(Debug, Serialize, Deserialize, Clone, Copy)]
+#[derive(Debug, Serialize, Deserialize, Clone, Copy, PartialEq, Eq)]
 pub enum Color {
     White,
     Red,
@@ -186,7 +186,7 @@ impl DB {
             }
         }
 
-        Err("Not Found".into())
+        Err("User Not Found".into())
     }
 
     pub async fn get_user_authenticated(&self, id: UID, session: &String) -> Result<&User, String> {
@@ -208,7 +208,7 @@ impl DB {
             }
         }
 
-        Err("Not Found".into())
+        Err("User Not Found".into())
     }
 
     pub async fn get_user_by_name(&self, name: &str) -> Result<Vec<User>, String> {
@@ -220,7 +220,7 @@ impl DB {
         }
 
         if vec.len() == 0 {
-            Err("Not Found".into())
+            Err("User(s) Not Found".into())
         } else {
             return Ok(vec)
         }
@@ -303,4 +303,40 @@ impl DB {
         let _ = self.save().await;
         r
     }
+
+    pub async fn transfer(&mut self, from: UID, to: UID, session: &String, color: Color, amount: usize) -> Result<(), String> {
+        let mut subtracted = false;
+        
+        let from = self.get_mut_user(from).await?;
+        // If authenticated
+        if from.authenticate(session) {
+            for v in from.tokovec.iter_mut() {
+                // Get the token of the right color
+                if v.color == color {
+                    // If amount is greater or equal to amount being sent
+                    // and if the amount does not overflow past 0
+                    if v.amount >= amount && v.amount.checked_sub(amount) != None {
+                        // Remove from account
+                        v.amount -= amount;
+                        subtracted = true;
+                    }
+                }
+            }
+        }
+
+        let to = self.get_mut_user(to).await?;
+        if subtracted {
+            for v in to.tokovec.iter_mut() {
+                if v.color == color {
+                    v.amount += amount
+                }
+            }
+
+            let _ = self.save().await;
+            Ok(())
+        } else {
+            Err("Could not complete transaction".into())
+        }
+
+    }
 }
-- 
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