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-rw-r--r--internal/router/api-v1-blog-search.go1
-rw-r--r--internal/router/api-v1-like.go122
-rw-r--r--internal/router/client-cache.go217
-rw-r--r--internal/router/lang-blog-title.go1
-rw-r--r--internal/router/lang-blog.go2
5 files changed, 323 insertions, 20 deletions
diff --git a/internal/router/api-v1-blog-search.go b/internal/router/api-v1-blog-search.go
index a809783..e22fabe 100644
--- a/internal/router/api-v1-blog-search.go
+++ b/internal/router/api-v1-blog-search.go
@@ -69,6 +69,7 @@ func Api_V1_BlogSearch(l map[string]*locale.LocaleConfig, langs []string, b2Clie
"ShortDescription": page.Metadata.ShortDescription,
"Thumbnail": page.Metadata.Thumbnail,
"Tags": page.Metadata.Tags,
+ "LikeCount": CCache.GetLikeCount(page.FileName),
})
break
}
diff --git a/internal/router/api-v1-like.go b/internal/router/api-v1-like.go
new file mode 100644
index 0000000..327dafa
--- /dev/null
+++ b/internal/router/api-v1-like.go
@@ -0,0 +1,122 @@
+package router
+
+import (
+ "fmt"
+ "log/slog"
+ "net/url"
+ "strconv"
+ "strings"
+
+ "github.com/SayaAndy/saya-today-web/internal/b2"
+ "github.com/SayaAndy/saya-today-web/locale"
+ "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(l map[string]*locale.LocaleConfig, 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))
+ }
+
+ newLikeStatus, err := strconv.ParseBool(c.FormValue("like", "true"))
+ if err != nil {
+ return c.Status(fiber.ErrBadRequest.Code).SendString("invalid 'like' value")
+ }
+
+ ip := c.IP()
+ 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{
+ "L": l[lang],
+ "Liked": newLikeStatus,
+ "LikedCount": CCache.GetLikeCount(page),
+ })
+ 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(l map[string]*locale.LocaleConfig, 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{
+ "L": l[lang],
+ "Liked": likeStatus,
+ "LikedCount": CCache.GetLikeCount(page),
+ })
+ 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))
+ }
+}
diff --git a/internal/router/client-cache.go b/internal/router/client-cache.go
index a4a0cc2..81d7641 100644
--- a/internal/router/client-cache.go
+++ b/internal/router/client-cache.go
@@ -1,48 +1,229 @@
package router
import (
+ "database/sql"
"encoding/base64"
+ "fmt"
"log/slog"
+ "strings"
"sync"
"golang.org/x/crypto/argon2"
)
+type PageLike struct {
+ PageRef string
+ UserId string
+}
+
type ClientCache struct {
- hashMap map[string][]byte
- mutexMap map[string]*sync.Mutex
- salt []byte
+ hashMap map[string]string
+ hashMapMutex sync.RWMutex
+
+ likePageMap map[string]map[string]struct{}
+ pageMutexMap map[string]*sync.RWMutex
+ pageMutexMapMutex sync.Mutex
+
+ salt []byte
+ db *sql.DB
}
var CCache *ClientCache
-func NewClientCache(salt []byte) *ClientCache {
- return &ClientCache{
- hashMap: make(map[string][]byte),
- mutexMap: make(map[string]*sync.Mutex),
- salt: salt,
+func NewClientCache(db *sql.DB, salt []byte) (*ClientCache, error) {
+ tx, err := db.Begin()
+ if err != nil {
+ return nil, fmt.Errorf("fail to init transaction with db to fill cache: %w", err)
+ }
+
+ rows, err := tx.Query("select * from blog_likes;")
+ if err != nil {
+ tx.Rollback()
+ return nil, fmt.Errorf("fail to query db for blog_likes to fill cache: %w", err)
}
+
+ likePageMap := make(map[string]map[string]struct{})
+ pageMutexMap := make(map[string]*sync.RWMutex)
+
+ for rows.Next() {
+ var pageRef string
+ var userId []byte
+ if err = rows.Scan(&pageRef, &userId); err != nil {
+ tx.Rollback()
+ return nil, fmt.Errorf("fail scanning blog_likes to fill cache: %w", err)
+ }
+ userIdString := base64.RawStdEncoding.EncodeToString(userId)
+ if _, ok := likePageMap[pageRef]; !ok {
+ likePageMap[pageRef] = make(map[string]struct{})
+ pageMutexMap[pageRef] = &sync.RWMutex{}
+ }
+ likePageMap[pageRef][userIdString] = struct{}{}
+ }
+
+ if err = tx.Commit(); err != nil {
+ return nil, fmt.Errorf("fail to commit transaction in db: %w", err)
+ }
+
+ return &ClientCache{
+ hashMap: make(map[string]string),
+ likePageMap: likePageMap,
+ pageMutexMap: pageMutexMap,
+ salt: salt,
+ db: db,
+ }, nil
}
-func (c *ClientCache) GetHash(id string) []byte {
+func (c *ClientCache) Close() error {
+ tx, err := c.db.Begin()
+ if err != nil {
+ return fmt.Errorf("fail to init transaction with db to dump cache: %w", err)
+ }
+
+ if _, err = tx.Exec("delete from blog_likes;"); err != nil {
+ tx.Rollback()
+ return fmt.Errorf("fail to truncate table blog_likes: %w", err)
+ }
+
+ userIdBytes := make(map[string][]byte)
+
+ sqlStatement := fmt.Sprintf(`
+ INSERT OR IGNORE INTO blog_likes (page_ref, user_id)
+ VALUES %s(?, ?);
+ `, strings.Repeat("(?, ?), ", 99))
+ sqlStatementVars := make([]any, 0, 200)
+
+ for pageRef, userSet := range c.likePageMap {
+ for userId := range userSet {
+ if _, ok := userIdBytes[userId]; !ok {
+ userIdBytes[userId], err = base64.RawStdEncoding.DecodeString(userId)
+ if err != nil {
+ slog.Warn("couldn't parse one of user hashes into bytes back", slog.String("hash", userId), slog.String("error", err.Error()))
+ continue
+ }
+ }
+
+ sqlStatementVars = append(sqlStatementVars, any(pageRef), any(userIdBytes[userId]))
+ if len(sqlStatementVars) < 200 {
+ continue
+ }
+
+ if _, err := tx.Exec(sqlStatement, sqlStatementVars...); err != nil {
+ slog.Warn("couldn't insert blog like pairs into db", slog.String("error", err.Error()))
+ }
+
+ sqlStatementVars = make([]any, 0, 200)
+ }
+ }
+
+ if len(sqlStatementVars) > 0 {
+ sqlStatement = fmt.Sprintf(`
+ INSERT OR IGNORE INTO blog_likes (page_ref, user_id)
+ VALUES %s(?, ?);
+ `, strings.Repeat("(?, ?), ", len(sqlStatementVars)/2-1))
+
+ if _, err := tx.Exec(sqlStatement, sqlStatementVars...); err != nil {
+ slog.Warn("couldn't insert blog like pairs into db", slog.String("error", err.Error()))
+ }
+ }
+
+ return tx.Commit()
+}
+func (c *ClientCache) GetHash(id string) string {
+ c.hashMapMutex.RLock()
if val, ok := c.hashMap[id]; ok {
- slog.Debug("gave an old hash", slog.String("hash", base64.RawStdEncoding.EncodeToString(val)))
+ c.hashMapMutex.RUnlock()
+ slog.Debug("gave an old hash", slog.String("hash", val))
return val
}
+ c.hashMapMutex.RUnlock()
- if _, ok := c.mutexMap[id]; !ok {
- c.mutexMap[id] = &sync.Mutex{}
- }
- c.mutexMap[id].Lock()
- defer c.mutexMap[id].Unlock()
+ c.hashMapMutex.Lock()
+ defer c.hashMapMutex.Unlock()
if val, ok := c.hashMap[id]; ok {
- slog.Debug("gave a newly generated hash", slog.String("hash", base64.RawStdEncoding.EncodeToString(val)))
+ slog.Debug("gave a newly generated hash", slog.String("hash", val))
return val
}
- c.hashMap[id] = argon2.IDKey([]byte(id), c.salt, 1, 64*1024, 4, 32)
- slog.Debug("generated hash", slog.String("hash", base64.RawStdEncoding.EncodeToString(c.hashMap[id])))
+ c.hashMap[id] = base64.RawStdEncoding.EncodeToString(argon2.IDKey([]byte(id), c.salt, 1, 64*1024, 4, 32))
+ slog.Debug("generated hash", slog.String("hash", c.hashMap[id]))
return c.hashMap[id]
}
+
+func (c *ClientCache) getPageMutex(page string) *sync.RWMutex {
+ c.pageMutexMapMutex.Lock()
+ defer c.pageMutexMapMutex.Unlock()
+
+ if mutex, ok := c.pageMutexMap[page]; ok {
+ return mutex
+ }
+
+ c.pageMutexMap[page] = &sync.RWMutex{}
+ return c.pageMutexMap[page]
+}
+
+func (c *ClientCache) GetLikeStatus(id string, page string) bool {
+ page = strings.Clone(page)
+
+ mutex := c.getPageMutex(page)
+ mutex.RLock()
+ defer mutex.RUnlock()
+
+ if _, ok := c.likePageMap[page]; !ok {
+ return false
+ }
+ _, ok := c.likePageMap[page][c.GetHash(id)]
+ return ok
+}
+
+func (c *ClientCache) GetLikeCount(page string) int {
+ page = strings.Clone(page)
+
+ mutex := c.getPageMutex(page)
+ mutex.RLock()
+ defer mutex.RUnlock()
+
+ if userSet, ok := c.likePageMap[page]; ok {
+ return len(userSet)
+ }
+ return 0
+}
+
+func (c *ClientCache) LikeOn(id string, page string) (alreadyLiked bool) {
+ page = strings.Clone(page)
+ hash := c.GetHash(id)
+
+ mutex := c.getPageMutex(page)
+ mutex.Lock()
+ defer mutex.Unlock()
+
+ if userSet, ok := c.likePageMap[page]; ok {
+ _, alreadyLiked = userSet[hash]
+ c.likePageMap[page][hash] = struct{}{}
+ return
+ }
+
+ c.likePageMap[page] = make(map[string]struct{})
+ c.likePageMap[page][hash] = struct{}{}
+ return
+}
+
+func (c *ClientCache) LikeOff(id string, page string) (alreadyUnliked bool) {
+ page = strings.Clone(page)
+ hash := c.GetHash(id)
+
+ mutex := c.getPageMutex(page)
+ mutex.Lock()
+ defer mutex.Unlock()
+
+ if _, ok := c.likePageMap[page]; !ok {
+ return true
+ }
+ if _, ok := c.likePageMap[page][hash]; !ok {
+ return true
+ }
+
+ delete(c.likePageMap[page], hash)
+ return false
+}
diff --git a/internal/router/lang-blog-title.go b/internal/router/lang-blog-title.go
index 5b80ec8..bafb0d2 100644
--- a/internal/router/lang-blog-title.go
+++ b/internal/router/lang-blog-title.go
@@ -24,7 +24,6 @@ func Lang_Blog_Title(l map[string]*locale.LocaleConfig, langs []string, b2Client
return func(c *fiber.Ctx) error {
ip := c.IP()
slog.Debug("client entering blog page", slog.String("ip", ip), slog.String("page", c.Path()))
- go CCache.GetHash(ip)
lang := c.Params("lang")
if !slices.Contains(langs, lang) {
diff --git a/internal/router/lang-blog.go b/internal/router/lang-blog.go
index e5220c6..dd3f079 100644
--- a/internal/router/lang-blog.go
+++ b/internal/router/lang-blog.go
@@ -83,7 +83,7 @@ func Lang_Blog(l map[string]*locale.LocaleConfig, langs []string, b2Client *b2.B
"Title": l[lang].BlogSearch.Header,
})
if err != nil {
- slog.Warn("failed to generate page", slog.String("page", "/"+lang+"/blog"), slog.String("error", err.Error()))
+ slog.Warn("failed to generate page", slog.String("path", c.Path()), slog.String("error", err.Error()))
c.Set(fiber.HeaderContentType, fiber.MIMETextPlainCharsetUTF8)
return c.Status(fiber.ErrInternalServerError.Code).SendString("failed to generate page")
}
generated by cgitext v1.3.1+17 (git 2.54.0) at 2026-09-16 17:24:34 +0000