初步优化成全部go+wails

internal/image/font.go

@@ -0,0 +1,53 @@
+package image
+
+import (
+	"errors"
+	"os"
+
+	"github.com/golang/freetype"
+	"github.com/golang/freetype/truetype"
+	"golang.org/x/image/font/gofont/goregular"
+
+	"douyu_go/internal/logger"
+)
+
+// LoadFont 预加载字体，优先使用本地或系统中文字体，缺失时使用内置字体兜底。
+func LoadFont(fontFiles []string) *truetype.Font {
+	source, font, err := parseFirstFont(fontFiles)
+	if err != nil {
+		source = "内置 Go Regular 字体"
+		font, err = freetype.ParseFont(goregular.TTF)
+		if err != nil {
+			logger.LogEvent("字体", "error", "内置字体解析失败，成功图片功能将跳过: %v", err)
+			return nil
+		}
+		logger.LogEvent("字体", "warn", "未找到可用系统字体，使用内置字体兜底，中文可能显示不完整")
+	}
+	logger.LogEvent("字体", "success", "字体加载完成: %s", source)
+	return font
+}
+
+func parseFirstFont(candidates []string) (string, *truetype.Font, error) {
+	for _, path := range candidates {
+		if path == "" {
+			continue
+		}
+		fontBytes, err := os.ReadFile(path)
+		if err != nil {
+			if !errors.Is(err, os.ErrNotExist) {
+				logger.LogEvent("字体", "warn", "字体读取失败，已跳过: %s: %v", path, err)
+			}
+			continue
+		}
+		if len(fontBytes) == 0 {
+			continue
+		}
+		font, err := freetype.ParseFont(fontBytes)
+		if err != nil {
+			logger.LogEvent("字体", "warn", "字体解析失败，已跳过: %s: %v", path, err)
+			continue
+		}
+		return path, font, nil
+	}
+	return "", nil, errors.New("没有可用字体")
+}

internal/image/image.go

@@ -0,0 +1,85 @@
+package image
+
+import (
+	"fmt"
+	"image"
+	"image/color"
+	"image/png"
+	"os"
+	"path/filepath"
+	"time"
+
+	"github.com/golang/freetype"
+	"github.com/golang/freetype/truetype"
+
+	"douyu_go/internal/constants"
+	"douyu_go/internal/logger"
+	"douyu_go/internal/types"
+	"douyu_go/internal/utils"
+)
+
+// SaveSuccessImage 保存成功兑换结果图片。
+func SaveSuccessImage(account types.Account, product types.Product, roleName string, font *truetype.Font, successDir string) {
+	if font == nil {
+		return
+	}
+
+	productName := product.CommodityName
+	if productName == "" {
+		productName = product.CommodityID
+	}
+
+	width, height := 600, 280
+	img := image.NewRGBA(image.Rect(0, 0, width, height))
+	bgColor := color.RGBA{213, 239, 253, 255}
+	topColor := color.RGBA{76, 175, 80, 255}
+	white := color.RGBA{255, 255, 255, 255}
+	black := color.RGBA{0, 0, 0, 255}
+
+	for x := 0; x < width; x++ {
+		for y := 0; y < height; y++ {
+			if y < 60 {
+				img.Set(x, y, topColor)
+			} else {
+				img.Set(x, y, bgColor)
+			}
+		}
+	}
+
+	ctx := freetype.NewContext()
+	ctx.SetDPI(72)
+	ctx.SetFont(font)
+	ctx.SetClip(img.Bounds())
+	ctx.SetDst(img)
+
+	lines := []struct {
+		Text  string
+		Size  float64
+		X, Y  int
+		Color color.Color
+	}{
+		{productName, 20, 25, 42, white},
+		{"兑换时间：" + time.Now().In(constants.CST).Format("2006年01月02日 15:04:05"), 16, 25, 110, black},
+		{"游戏昵称：" + utils.EmptyDefault(roleName, "未知"), 16, 25, 150, black},
+		{"兑换账号：" + account.Name, 16, 25, 190, black},
+	}
+	for _, line := range lines {
+		ctx.SetFontSize(line.Size)
+		ctx.SetSrc(image.NewUniform(line.Color))
+		_, _ = ctx.DrawString(line.Text, freetype.Pt(line.X, line.Y))
+	}
+
+	name := utils.SafeFilename(fmt.Sprintf("%s_%s_%d.png", account.Name, productName, time.Now().Unix()))
+	path := filepath.Join(successDir, name)
+	file, err := os.Create(path)
+	if err != nil {
+		logger.LogEvent("图片", "error", "成功图片创建失败: %v", err)
+		return
+	}
+	defer file.Close()
+	if err := png.Encode(file, img); err != nil {
+		logger.LogEvent("图片", "error", "成功图片保存失败: %v", err)
+		return
+	}
+	logger.LogEvent("图片", "success", "成功图片已保存: %s", path)
+}