Maintain history; use state

model.go

@@ -0,0 +1,27 @@
+package main
+
+import "git.makyo.dev/makyo/gogogogogram/state"
+
+type model struct {
+	fieldSize, sectionSize, cellsPerSection int
+
+	state *state.State
+
+	clears, score, factor, track int
+
+	columnStates, rowStates     [][]int
+	columnsCorrect, rowsCorrect []bool
+
+	history string
+}
+
+func newModel(sectionSize, cellsPerSection int) model {
+	m := model{
+		fieldSize:       sectionSize * cellsPerSection,
+		sectionSize:     sectionSize,
+		cellsPerSection: cellsPerSection,
+		state:           state.New(sectionSize, cellsPerSection),
+	}
+
+	return m
+}