1 files changed, 40 insertions, 0 deletions

diff --git a/src/commands/update.rs b/src/commands/update.rs
new file mode 100644
index 0000000..14c37ec
--- /dev/null
+++ b/src/commands/update.rs
@@ -0,0 +1,40 @@
+use std::io::{Error, ErrorKind};
+
+use crate::{config::Cfg, modrinth::projects, get_current_list, db::{get_mods_from_list, get_versions}};
+
+pub async fn update(config: Cfg) -> Result<(), Box<dyn std::error::Error>> {
+
+    let current_list = get_current_list(config.clone())?;
+
+    let mods = get_mods_from_list(config.clone(), current_list)?;
+
+    let mut projects = projects(String::from(&config.apis.modrinth), mods.clone()).await;
+    
+    let mut versions = get_versions(config, mods)?;
+    
+    projects.sort_by_key(|p| p.id.clone());
+
+    versions.sort_by_key(|v| v.mod_id.clone());
+    
+    let mut update_stack: Vec<String> = vec![];
+
+    for (index, project) in projects.iter().enumerate() {
+
+        let cmp_version = &versions[index];
+
+        let p_id = &project.id;
+        let v_id = &cmp_version.mod_id;
+
+        if p_id != v_id { return Err(Box::new(Error::new(ErrorKind::Other, "COMPARE_SORTING_ERR"))); };
+        println!("{}:{}", p_id, v_id);
+
+        if project.versions.join("|") != cmp_version.versions {
+            update_stack.push(String::from(&project.id));
+        };
+    };
+
+    //TODO UPDATE
+    dbg!(update_stack);
+
+    Ok(())
+}