Transfer region struct and validation method (partial)

src/data/mod.rs

@@ -1 +1,2 @@
 pub mod plate;
+pub mod region;

src/data/transfer_region.rs

@@ -0,0 +1,69 @@
+use super::plate::Plate;
+
+enum Region {
+    Rect((u8,u8),(u8,u8)),
+    Point(u8,u8)
+}
+
+struct TransferRegion {
+    source_plate: &Plate,
+    source_region: Region::Rect, // Even if it is just a point, we don't want corners.
+    dest_plate: &Plate,
+    dest_region: Region,
+    offset: Option<(u8,u8)>,
+}
+
+impl TransferRegion {
+    pub fn validate(&self) -> Result<(), String> {
+        /// Checks if the region does anything suspect
+        ///
+        /// If validation fails, we pass a string to show to the user.
+        ///
+        /// We check:
+        ///     - Are the wells in the source really there?
+        ///     - Are the wells in the destination there? (Sometimes running OOB is okay though?)
+        ///     - In a replication region, do the source lengths divide the destination lengths?
+
+        // Easy checks:
+        if self.source_region.0.0 == 0 || self.source_region.0.1 == 0
+            || self.source_region.1.0 == 0 || self.source_region.1.1 == 0 {
+                Err("Source region is out-of-bounds! (Too small)")
+            }
+
+        // Check if all source wells exist:
+        // Sufficient to check if the corners are in-bounds
+        let source_max = self.source_plate.size();
+        if self.source_region.0.0 > source_max.0 ||
+            self.source_region.1.0 > source_max.0 {
+                Err("Source region is out-of-bounds! (Too tall)")
+            }
+        if self.source_region.0.1 > source_max.1 ||
+            self.source_region.1.1 > source_max.1 {
+                Err("Source region is out-of-bounds! (Too wide)")
+            }
+
+        // Check if all destination wells exist:
+        // NOT IMPLEMENTED
+
+        // Check that source lengths divide destination lengths
+        match self.dest_region {
+            Point => (),
+            Region::Rect(c1, c2) => {
+                let dest_diff_i = u8::abs_diff(c1.0, c2.0);
+                let dest_diff_j = u8::abs_diff(c1.1, c2.1);
+
+                let source_diff_i = u8::abs_diff(self.source_region.0.0, self.source_region.1.0);
+                let source_diff_j = u8::abs_diff(self.source_region.0.1, self.source_region.1.1);
+
+                if source_diff_i % dest_diff_i != 0 {
+                    Err("Replicate region has indivisible height!")
+                }
+                if source_diff_j % dest_diff_j != 0 {
+                    Err("Replicate region has indivisible width!")
+                }
+            }
+        }
+
+        return Ok(())
+    }
+}