Update Database

Database is more usable now.
All pages have been updated to use the database, and share an application configuration.
Page Stack has been removed, no more pages hanging around in memory. Replaced with a 'Router' which uses an Enum to determine which page should be displayed, destroys the old page and initializes the new page all in one go. No more push, pop, rollback, etc. No more holding instances of pages.
Logger has been updated with proper timestamps and sorting now works as expected."

internal/page/page.go

@@ -12,29 +12,16 @@ import (
 
 // Page defines the contract for all application screens.
 type Page interface {
-	Init(app ApplicationInterface) error
+	Init(ctx *PageCtx) error
 	HandleEvent(event *sdl.Event) error
 	Update(dt float32) error
 	Render() error
-	// Destroy cleans up the page's resources. The Application's page manager
-	// is responsible for calling this method
 	Destroy() error
 }
 
-// ApplicationInterface defines the set of methods that a page can use to
-// interact with the main application.
-type ApplicationInterface interface {
-	SwitchPage(p Page)
-	PushPage(p Page)
-	UnwindToPage(p Page)
-	GetDrawableSize() (int32, int32)
-	SchedulePop()
-	Quit()
-}
-
 // Base is a helper struct that pages can embed to get common functionality.
 type Base struct {
-	App           ApplicationInterface
+	Context       *PageCtx
 	QuadVAO       uint32
 	QuadVBO       uint32
 	Projection    mgl32.Mat4
@@ -45,9 +32,8 @@ type Base struct {
 }
 
 // Init stores the application context and sets up common resources.
-func (p *Base) Init(app ApplicationInterface) error {
-	p.App = app
-
+func (p *Base) Init(ctx *PageCtx) error {
+	p.Context = ctx
 	vertices := []float32{
 		// pos(x,y) tex(u,v)
 		0.0, 1.0, 0.0, 1.0,
@@ -59,12 +45,14 @@ func (p *Base) Init(app ApplicationInterface) error {
 		1.0, 0.0, 1.0, 0.0,
 	}
 
-	screenWidth, screenHeight := p.App.GetDrawableSize()
-	p.Projection = mgl32.Ortho(0, float32(screenWidth), 0, float32(screenHeight), -1, 1)
-	p.ScreenHeight = screenHeight
-	p.ScreenWidth = screenWidth
-	p.ScreenCenterX = screenWidth / 2
-	p.ScreenCenterY = screenHeight / 2
+	W := p.Context.W
+	H := p.Context.H
+
+	p.Projection = mgl32.Ortho(0, float32(W), 0, float32(H), -1, 1)
+	p.ScreenHeight = H
+	p.ScreenWidth = W
+	p.ScreenCenterY = H / 2
+	p.ScreenCenterX = W / 2
 
 	gl.GenVertexArrays(1, &p.QuadVAO)
 	gl.GenBuffers(1, &p.QuadVBO)