feat: 门户网站初始提交

- Go + Gin + html/template 服务端渲染 - 主页：Google 风格搜索框 + 导航卡片 - 后台：卡片 CRUD、搜索引擎配置、主页背景/标题配置 - 图片上传：支持 jpg/jpeg/png/gif，自动压缩，缩略图参数 ?thumb=1 - 安全：登录日志、修改密码、IP 自动封禁、IP 白名单 - 访问统计：主页访问/卡片点击/搜索追踪、实时流量、IP 统计 - SQLite 存储（modernc.org/sqlite，纯 Go） - 内存 Session + bcrypt 密码哈希
2026-05-28 13:54:07 +08:00
commit c16a8dfbc4
42 changed files with 5295 additions and 0 deletions
@@ -0,0 +1,141 @@
+package handlers
+
+import (
+	"net/http"
+	"strings"
+
+	"simple_portal/models"
+
+	"github.com/gin-gonic/gin"
+)
+
+// SettingsGet renders the admin settings page.
+func SettingsGet(c *gin.Context) {
+	username, _ := c.Get("username")
+
+	searchEngine, err := models.GetSetting(models.SettingKeySearchEngine)
+	if err != nil {
+		searchEngine = models.SearchEngineGoogle
+	}
+	if searchEngine == "" {
+		searchEngine = models.SearchEngineGoogle
+	}
+
+	engines := map[string]string{
+		"Google": models.SearchEngineGoogle,
+		"Bing":   models.SearchEngineBing,
+		"百度":    models.SearchEngineBaidu,
+	}
+
+	// Fetch homepage configuration
+	homepageTitle, _ := models.GetSetting(models.SettingKeyHomepageTitle)
+	if homepageTitle == "" {
+		homepageTitle = models.DefaultHomepageTitle
+	}
+
+	homepageSubtitle, _ := models.GetSetting(models.SettingKeyHomepageSubtitle)
+	homepageBackground, _ := models.GetSetting(models.SettingKeyHomepageBackground)
+
+	c.HTML(http.StatusOK, "admin/settings.html", gin.H{
+		"Title":              "设置",
+		"Username":           username,
+		"SearchEngine":       searchEngine,
+		"Engines":            engines,
+		"HomepageTitle":     homepageTitle,
+		"HomepageSubtitle":  homepageSubtitle,
+		"HomepageBackground": homepageBackground,
+	})
+}
+
+// SettingsPost handles the settings form submission.
+func SettingsPost(c *gin.Context) {
+	username, _ := c.Get("username")
+
+	searchEngine := c.PostForm("search_engine")
+	customURL := c.PostForm("custom_url")
+
+	// 如果用户填写了自定义URL，优先使用
+	if customURL != "" {
+		if !strings.Contains(customURL, "%s") {
+			engines := map[string]string{
+				"Google": models.SearchEngineGoogle,
+				"Bing":   models.SearchEngineBing,
+				"百度":    models.SearchEngineBaidu,
+			}
+			homepageTitle := c.PostForm("homepage_title")
+			if homepageTitle == "" {
+				homepageTitle = models.DefaultHomepageTitle
+			}
+			homepageSubtitle := c.PostForm("homepage_subtitle")
+			homepageBackground := c.PostForm("homepage_background")
+
+			c.HTML(http.StatusOK, "admin/settings.html", gin.H{
+				"Title":              "设置",
+				"Username":           username,
+				"SearchEngine":       searchEngine,
+				"Engines":            engines,
+				"HomepageTitle":     homepageTitle,
+				"HomepageSubtitle":  homepageSubtitle,
+				"HomepageBackground": homepageBackground,
+				"Error":              "自定义 URL 必须包含 %s 作为搜索词占位符",
+			})
+			return
+		}
+		searchEngine = customURL
+	}
+
+	if searchEngine == "" {
+		searchEngine = models.SearchEngineGoogle
+	}
+
+	// Save search engine setting
+	if err := models.SetSetting(models.SettingKeySearchEngine, searchEngine); err != nil {
+		engines := map[string]string{
+			"Google": models.SearchEngineGoogle,
+			"Bing":   models.SearchEngineBing,
+			"百度":    models.SearchEngineBaidu,
+		}
+		homepageTitle := c.PostForm("homepage_title")
+		if homepageTitle == "" {
+			homepageTitle = models.DefaultHomepageTitle
+		}
+		homepageSubtitle := c.PostForm("homepage_subtitle")
+		homepageBackground := c.PostForm("homepage_background")
+
+		c.HTML(http.StatusOK, "admin/settings.html", gin.H{
+			"Title":              "设置",
+			"Username":           username,
+			"SearchEngine":       searchEngine,
+			"Engines":            engines,
+			"HomepageTitle":     homepageTitle,
+			"HomepageSubtitle":  homepageSubtitle,
+			"HomepageBackground": homepageBackground,
+			"Error":              "保存失败，请重试",
+		})
+		return
+	}
+
+	// Save homepage settings
+	homepageTitle := c.PostForm("homepage_title")
+	if homepageTitle == "" {
+		homepageTitle = models.DefaultHomepageTitle
+	}
+	homepageSubtitle := c.PostForm("homepage_subtitle")
+	homepageBackground := c.PostForm("homepage_background")
+
+	if err := models.SetSetting(models.SettingKeyHomepageTitle, homepageTitle); err != nil {
+		c.Redirect(http.StatusFound, "/admin/settings")
+		return
+	}
+	if err := models.SetSetting(models.SettingKeyHomepageSubtitle, homepageSubtitle); err != nil {
+		c.Redirect(http.StatusFound, "/admin/settings")
+		return
+	}
+	if err := models.SetSetting(models.SettingKeyHomepageBackground, homepageBackground); err != nil {
+		c.Redirect(http.StatusFound, "/admin/settings")
+		return
+	}
+
+	// 保存成功后重定向，利用 PRG 模式
+	c.Redirect(http.StatusFound, "/admin/settings")
+}