1 files changed, 117 insertions, 0 deletions
diff --git a/internal/router/api-v1-like.go b/internal/router/api-v1-like.go
new file mode 100644
index 0000000..1732c77
--- /dev/null
+++ b/internal/router/api-v1-like.go
@@ -0,0 +1,117 @@
+package router
+
+import (
+	"fmt"
+	"log/slog"
+	"net/url"
+	"strconv"
+	"strings"
+
+	"github.com/SayaAndy/saya-today-web/internal/b2"
+	"github.com/gofiber/fiber/v2"
+)
+
+func init() {
+	tm.Add("blog-page-like-button", "views/partials/blog-page-like-button.html")
+}
+
+func Api_V1_Like_Put(b2 *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()
+		pathParts := strings.Split(strings.Trim(path, "/"), "/")
+		if len(pathParts) != 3 {
+			return c.Status(fiber.ErrBadRequest.Code).SendString("'Referer' header is invalid: expect format '/{lang}/blog/{page}'")
+		}
+
+		lang, page := pathParts[0], pathParts[2]
+
+		pageLink := lang + "/" + page + ".md"
+		if pages, _ := b2.Scan(pageLink); len(pages) == 0 {
+			return c.Status(fiber.ErrNotFound.Code).SendString(fmt.Sprintf("server did not find '%s' article", pageLink))
+		}
+
+		ip := c.IP()
+		newLikeStatus, err := strconv.ParseBool(c.FormValue("like", "true"))
+		if err != nil {
+			return c.Status(fiber.ErrBadRequest.Code).SendString("invalid 'like' value")
+		}
+
+		if newLikeStatus {
+			CCache.LikeOn(ip, page)
+		} else {
+			CCache.LikeOff(ip, page)
+		}
+
+		slog.Debug("someone pressed the like button!", slog.String("ip", ip), slog.String("page", page), slog.String("new_like_status", fmt.Sprint(newLikeStatus)))
+		if c.Get("HX-Request", "false") == "true" {
+			content, err := tm.Render("blog-page-like-button", fiber.Map{
+				"Liked": newLikeStatus,
+			})
+			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")
+			}
+			c.Set(fiber.HeaderContentType, fiber.MIMETextHTMLCharsetUTF8)
+			return c.Status(fiber.StatusOK).Send(content)
+		}
+
+		return c.Status(fiber.StatusOK).SendString(fmt.Sprint(newLikeStatus))
+	}
+}
+
+func Api_V1_Like_Get(b2 *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()
+		pathParts := strings.Split(strings.Trim(path, "/"), "/")
+		if len(pathParts) != 3 {
+			return c.Status(fiber.ErrBadRequest.Code).SendString("'Referer' header is invalid: expect format '/{lang}/blog/{page}'")
+		}
+
+		lang, page := pathParts[0], pathParts[2]
+
+		pageLink := lang + "/" + page + ".md"
+		if pages, _ := b2.Scan(pageLink); len(pages) == 0 {
+			return c.Status(fiber.ErrNotFound.Code).SendString(fmt.Sprintf("server did not find '%s' article", pageLink))
+		}
+
+		ip := c.IP()
+		likeStatus := CCache.GetLikeStatus(ip, page)
+
+		slog.Debug("someone requested the like status!", slog.String("ip", ip), slog.String("page", page), slog.Bool("like_status", likeStatus))
+		if c.Get("HX-Request", "false") == "true" {
+			content, err := tm.Render("blog-page-like-button", fiber.Map{
+				"Liked": likeStatus,
+			})
+			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")
+			}
+			c.Set(fiber.HeaderContentType, fiber.MIMETextHTMLCharsetUTF8)
+			return c.Status(fiber.StatusOK).Send(content)
+		}
+
+		return c.Status(fiber.StatusOK).SendString(fmt.Sprint(likeStatus))
+	}
+}