Downloads are working and the goroutine is reporting updates appropriately.

internal/page/home.go

@@ -2,12 +2,14 @@ package page
 
 import (
 	"fmt"
+	"path/filepath"
 	"time"
 
 	"github.com/go-gl/gl/v3.3-core/gl"
 	"github.com/go-gl/mathgl/mgl32"
 	"github.com/veandco/go-sdl2/sdl"
 	"rhemawavetech.com/rhemawave/internal/colors"
+	"rhemawavetech.com/rhemawave/internal/download"
 	"rhemawavetech.com/rhemawave/internal/fontManager"
 	"rhemawavetech.com/rhemawave/internal/shaderManager"
 )
@@ -16,16 +18,20 @@ var GitVersion = "1.0"
 
 type Home struct {
 	Base
-	title              StringItem
-	version            StringItem
-	prompt             StringItem
-	note               StringItem
-	licenseInfoHeading StringItem
-	emailDisplay       StringItem
-	licenseKeyDisplay  StringItem
-	hasLicenseInfo     bool
-	lastDisplayUpdate  time.Time
-	baseFontSize       int // cached from db at init
+	fm                   *fontManager.FontManager
+	font                 *fontManager.FontEntry
+	title                StringItem
+	version              StringItem
+	prompt               StringItem
+	note                 StringItem
+	message              StringItem
+	downloadProgressChan chan download.DownloadStatus
+	licenseInfoHeading   StringItem
+	emailDisplay         StringItem
+	licenseKeyDisplay    StringItem
+	hasLicenseInfo       bool
+	lastDisplayUpdate    time.Time
+	baseFontSize         int // cached from db at init
 }
 
 // Init performs basic page initialization and creation of static assets.
@@ -40,11 +46,12 @@ func (p *Home) Init(ctx *PageCtx) error {
 	}
 
 	// Get font
-	fm := fontManager.Get()
-	font, ok := fm.GetFont("Roboto-Regular")
+	p.fm = fontManager.Get()
+	font, ok := p.fm.GetFont("Roboto-Regular")
 	if !ok {
 		return fmt.Errorf("unable to fetch font")
 	}
+	p.font = font
 
 	// Create title texture
 	var err error
@@ -72,6 +79,9 @@ func (p *Home) Init(ctx *PageCtx) error {
 		return fmt.Errorf("unable to create note string texture: %w", err)
 	}
 
+	// Create download channel and message
+	p.downloadProgressChan = make(chan download.DownloadStatus)
+
 	// Create license info textures if data exists
 	if p.Context.CfgPtr.EmailAddress != "" || p.Context.CfgPtr.LicenseKey != "" {
 		p.hasLicenseInfo = true
@@ -123,6 +133,25 @@ func (p *Home) Init(ctx *PageCtx) error {
 		}
 	}
 
+	audioFileNames := []string{
+		"OriginalAudio.wav",
+		"174Hz.wav",
+		"396Hz.wav",
+		"417Hz.wav",
+		"432Hz.wav",
+		"639Hz.wav",
+		"741Hz.wav",
+		"852Hz.wav",
+		"963Hz.wav",
+		"1111Hz.wav",
+		"14Hz_Binaural.wav",
+		"40Hz_Binaural.wav",
+		"AlphaWaves.wav",
+		"PinealGland.wav",
+	}
+
+	go download.DownloadAudioFiles(p.downloadProgressChan, audioFileNames, filepath.Join(ctx.CfgPtr.AssetsDir, "audio"))
+
 	return nil
 }
 
@@ -133,6 +162,21 @@ func (p *Home) HandleEvent(event *sdl.Event) error {
 
 // Update updates animations and changing textures and other changes using `dt` which represents a time delta in float32.
 func (p *Home) Update(dt float32) error {
+	var err error
+
+	select {
+	case progressUpdate := <-p.downloadProgressChan:
+		if progressUpdate.Err != nil {
+			p.message, err = NewStringItem(progressUpdate.Msg, p.font, colors.White)
+			if err != nil {
+				return err
+			}
+		} else {
+			p.message, err = NewStringItem(progressUpdate.Err.Error(), p.font, colors.Red)
+		}
+	default:
+		return nil
+	}
 	return nil
 }