1 files changed, 95 insertions, 0 deletions
diff --git a/internal/router/api-v1-general-page-header.go b/internal/router/api-v1-general-page-header.go
new file mode 100644
index 0000000..a2c832b
--- /dev/null
+++ b/internal/router/api-v1-general-page-header.go
@@ -0,0 +1,95 @@
+package router
+
+import (
+	"fmt"
+	"log/slog"
+	"net/url"
+	"strings"
+	"time"
+
+	"github.com/SayaAndy/saya-today-web/config"
+	"github.com/SayaAndy/saya-today-web/internal/b2"
+	"github.com/SayaAndy/saya-today-web/locale"
+	"github.com/gofiber/fiber/v2"
+)
+
+func init() {
+	tm.Add("general-page-header", "views/partials/general-page-header.html")
+}
+
+func Api_V1_GeneralPage_Header(l map[string]*locale.LocaleConfig, langs []config.AvailableLanguageConfig, b2Client *b2.B2Client) func(c *fiber.Ctx) error {
+	return func(c *fiber.Ctx) error {
+		c.Set(fiber.HeaderContentType, fiber.MIMETextPlainCharsetUTF8)
+
+		referer := c.Get("Referer", "")
+		if referer == "" {
+			return c.Status(fiber.ErrBadRequest.Code).SendString("'Referer' header is empty")
+		}
+		urlStruct, err := url.ParseRequestURI(referer)
+		if err != nil {
+			return c.Status(fiber.ErrBadRequest.Code).SendString(fmt.Sprintf("'Referer' header is invalid: %s", err.Error()))
+		}
+
+		path := urlStruct.EscapedPath()
+
+		cacheKey := fmt.Sprintf("header.%s", path)
+		if val, ok := PCache.Get(cacheKey); val != nil && ok {
+			c.Set(fiber.HeaderContentType, fiber.MIMETextHTMLCharsetUTF8)
+			return c.Status(fiber.StatusOK).Type("html").Send(val)
+		}
+
+		lang := ""
+		pathParts := strings.Split(strings.Trim(path, "/"), "/")
+		if len(pathParts) == 1 && pathParts[0] == "" {
+			pathParts = []string{}
+		}
+		if len(pathParts) > 0 {
+			lang = pathParts[0]
+			for _, availableLang := range langs {
+				if availableLang.Name == lang {
+					goto langIsAvailable
+				}
+			}
+			return c.Status(fiber.ErrBadRequest.Code).SendString("'Referer' header is invalid: expect format '/{lang}/...'")
+		}
+
+	langIsAvailable:
+		values := fiber.Map{
+			"L":           l[lang],
+			"Lang":        lang,
+			"Path":        strings.Trim(path, "/"),
+			"QueryString": string(c.Request().URI().QueryString()),
+		}
+		var additionalTemplates []string
+
+		if len(pathParts) == 2 && pathParts[1] == "blog" {
+			values["Title"] = l[lang].BlogSearch.Header
+			additionalTemplates = append(additionalTemplates, "views/pages/blog-catalogue.html")
+		} else if len(pathParts) == 3 && pathParts[1] == "blog" {
+			metadata, _, err := b2Client.ReadFrontmatter(lang + "/" + pathParts[2] + ".md")
+			if err != nil {
+				return c.Status(fiber.ErrNotFound.Code).SendString(fmt.Sprintf("could not read '%s' for content", path))
+			}
+			values["Title"] = metadata.Title
+			values["PublishedDate"] = metadata.PublishedTime.Format("2006-01-02 15:04:05 -07:00")
+			values["ActionDate"] = metadata.ActionDate
+			additionalTemplates = append(additionalTemplates, "views/pages/blog-page.html")
+		} else if len(pathParts) == 1 {
+			values["Title"] = l[lang].HomePage.Header
+			additionalTemplates = append(additionalTemplates, "views/pages/home-page.html")
+		} else if len(pathParts) == 0 {
+			values["Title"] = "Choose Your Language"
+			additionalTemplates = append(additionalTemplates, "views/pages/language-pick.html")
+		}
+
+		content, err := tm.Render("general-page-header", values, additionalTemplates...)
+		if err != nil {
+			slog.Warn("failed to generate div", slog.String("path", path), slog.String("error", err.Error()))
+			return c.Status(fiber.ErrInternalServerError.Code).SendString("failed to generate div")
+		}
+
+		go PCache.SetWithTTL(cacheKey, content, int64(len(content)), 5*time.Minute)
+		c.Set(fiber.HeaderContentType, fiber.MIMETextHTMLCharsetUTF8)
+		return c.Status(fiber.StatusOK).Type("html").Send(content)
+	}
+}