Refactor codebase into submodules

src/smush_rules.rs

@@ -0,0 +1,22 @@
+// Rules get parsed from file, converted into matrix format (for the in-memory movement),
+// then combined (smushed) into a single matrix + vector/rule for each . The list of units can then have the rules applied
+//
+// For now just ignore the all from/to stuff, it's kind of a shit thing to do, and can
+// be worked around by actually inputting every type into the rules
+
+use std::collections::HashMap;
+
+use crate::MovementRule;
+
+pub fn smush_rules(rules: Vec<MovementRule>) -> Vec<MovementRule> {
+    let ruleMapping: HashMap<String, usize> = HashMap::new();
+    // First build out the list/map of all departments (store index of each element in the array)
+    // TODO: We could make this more advanced by only smushing per divider, so that only the departments
+    // needed between each pass is actually required
+    for rule in rules {
+        for department in rule.from_departments {
+            // ruleMapping.entry(department).or_insert(ruleMapping.len());
+        }
+    }
+    vec![]
+}