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package router
import (
"bytes"
"fmt"
"html/template"
"log/slog"
"math/rand"
"net/url"
"regexp"
"slices"
"strings"
"time"
"github.com/SayaAndy/saya-today-web/config"
"github.com/SayaAndy/saya-today-web/internal/b2"
"github.com/SayaAndy/saya-today-web/internal/factgiver"
"github.com/SayaAndy/saya-today-web/internal/frontmatter"
"github.com/SayaAndy/saya-today-web/internal/mailer"
"github.com/SayaAndy/saya-today-web/locale"
"github.com/gofiber/fiber/v2"
"github.com/yuin/goldmark"
)
var FactGiver *factgiver.FactGiver
var Mailer *mailer.Mailer
func init() {
assert(0, tm.Add("general-page-body", "views/partials/general-page-body.html"))
}
func Api_V1_GeneralPage_Body(l map[string]*locale.LocaleConfig, langs []config.AvailableLanguageConfig, b2Client *b2.B2Client, md goldmark.Markdown) 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()
trimmedPath := strings.Trim(path, "/")
cacheKey := fmt.Sprintf("body.%s", trimmedPath)
if val, ok := PCache.Get(cacheKey); !strings.HasSuffix(trimmedPath, "user") && val != nil && ok {
c.Set(fiber.HeaderContentType, fiber.MIMETextHTMLCharsetUTF8)
return c.Status(fiber.StatusOK).Type("html").Send(val)
}
lang := ""
pathParts := strings.Split(trimmedPath, "/")
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" {
querySort := c.Query("sort")
if querySort == "" {
querySort = "publicationDateDesc"
}
encodedQuery := c.Request().URI().QueryString()
re, err := regexp.Compile(`tags\[\]=([\w]+)`)
if err != nil {
slog.Warn("failed to generate regex for tags gathering", slog.String("error", err.Error()))
return c.Status(fiber.ErrInternalServerError.Code).SendString("failed to generate regex for tags gathering")
}
decodedQuery, _ := url.QueryUnescape(string(encodedQuery))
matches := re.FindAllStringSubmatch(decodedQuery, -1)
queryTags := make([]string, 0, len(matches))
for _, match := range matches {
queryTags = append(queryTags, string(match[1]))
}
pages, err := b2Client.Scan(lang + "/")
if err != nil {
slog.Warn("failed to scan pages via b2", slog.String("error", err.Error()))
return c.Status(fiber.ErrInternalServerError.Code).SendString(fmt.Sprintf("failed to scan pages via b2: %s", slog.String("error", err.Error())))
}
tagsMap := make(map[string]int)
for _, page := range pages {
for _, tag := range page.Metadata.Tags {
tagsMap[tag]++
}
}
slog.Debug("enlist pages for catalogue", slog.Int("tag_count", len(tagsMap)), slog.Int("page_count", len(pages)), slog.String("path", c.Path()))
type Tag struct {
Name string `json:"Name" yaml:"name"`
Count int `json:"Count" yaml:"count"`
}
tagsArray := make([]Tag, 0, len(tagsMap))
for tag, count := range tagsMap {
tagsArray = append(tagsArray, Tag{tag, count})
}
slices.SortFunc(tagsArray, func(a Tag, b Tag) int {
return strings.Compare(a.Name, b.Name)
})
values["Tags"] = tagsArray
values["QuerySort"] = querySort
values["QueryTags"] = strings.Join(queryTags, ",")
values["Title"] = l[lang].BlogSearch.Header
additionalTemplates = append(additionalTemplates, "views/pages/blog-catalogue.html")
} else if len(pathParts) == 2 && pathParts[1] == "user" {
values["Title"] = l[lang].UserProfile.Header
email, _, err := Mailer.GetInfo(c.IP())
if err != nil {
slog.Error("get info from mailer about a client", slog.String("error", err.Error()))
}
values["Email"] = email
values["EmailCode"] = c.Query("email_code")
additionalTemplates = append(additionalTemplates, "views/pages/user-page.html")
} else if len(pathParts) == 3 && pathParts[1] == "blog" {
metadata, parsedMarkdown, err := readBlogPost(md, b2Client, lang+"/"+pathParts[2])
if err != nil {
return c.Status(fiber.ErrNotFound.Code).SendString(fmt.Sprintf("failed to find '%s' post", pathParts[2]))
}
geolocationParts := strings.Split(metadata.Geolocation, " ")
var x, y, areaError string
if len(geolocationParts) >= 2 {
x = geolocationParts[0]
y = geolocationParts[1]
}
if len(geolocationParts) >= 3 {
areaError = geolocationParts[2]
}
values["MapLocationX"] = x
values["MapLocationY"] = y
values["MapLocationAreaMeters"] = areaError
values["Title"] = metadata.Title
values["ParsedMarkdown"] = template.HTML(parsedMarkdown)
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")
go CCache.View(c.IP(), pathParts[2])
} else if len(pathParts) == 1 {
values["Title"] = l[lang].HomePage.Header
values["FilledHeartCount"] = uint(40)
values["OutlineHeartCount"] = uint(40)
values["GifName"] = fmt.Sprintf("otter-%d.gif", rand.Int()%3+1)
values["FunFacts"] = FactGiver.Give(lang)
additionalTemplates = append(additionalTemplates, "views/pages/home-page.html")
} else if len(pathParts) == 0 {
values["Title"] = "Choose Your Language"
values["AvailableLanguages"] = langs
additionalTemplates = append(additionalTemplates, "views/pages/language-pick.html")
}
content, err := tm.Render("general-page-body", 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)
}
}
func readBlogPost(md goldmark.Markdown, b2Client *b2.B2Client, sourceName string) (metadata *frontmatter.Metadata, html string, err error) {
metadata, markdown, err := b2Client.ReadFrontmatter(sourceName + ".md")
if err != nil {
return nil, "", fmt.Errorf("failed to read a frontmatter file: %w", err)
}
var buf bytes.Buffer
if err := md.Convert(markdown, &buf); err != nil {
return nil, "", fmt.Errorf("convert source context from md to html: %w", err)
}
return metadata, buf.String(), nil
}
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