From 2010c906b150bd4f7e318a13cd02a6ba49897bc8 Mon Sep 17 00:00:00 2001
From: xqtc <xqtc@tutanota.com>
Date: Thu, 10 Oct 2024 22:21:51 +0200
Subject: [PATCH] Handle substance file not existing when ingestion is added

---
 src/substances.rs | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/substances.rs b/src/substances.rs
index 5d67f33..947ac68 100644
--- a/src/substances.rs
+++ b/src/substances.rs
@@ -87,7 +87,18 @@ pub fn list_substances() -> Result<(), std::io::Error> {
 }
 
 pub fn substances_to_vec() -> Vec<String> {
-    let sub_read = std::fs::read(SUBSTANCES_FILE.to_string()).unwrap();
+    let sub_read_res = std::fs::read(SUBSTANCES_FILE.to_string());
+    let sub_read = match sub_read_res {
+        Ok(sub_contents) => sub_contents,
+        Err(_) => {
+            println!("Error! Substance file does not exist. Creating file...");
+            let hash: HashMap<Uuid, Substance> = HashMap::new();
+            let hash_ser = bincode::serialize(&hash).unwrap();
+            std::fs::write(SUBSTANCES_FILE.to_string(), hash_ser).unwrap();
+            let ret: Vec<u8> = vec![];
+            ret
+        }
+    };
     let sub_dec: HashMap<Uuid, Substance> = bincode::deserialize(&sub_read).unwrap();
     let mut sub_vec: Vec<String> = vec![];
     for (id, substance) in sub_dec.clone().into_iter() {