198 lines
5.3 KiB
Go
198 lines
5.3 KiB
Go
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package website
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import (
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"fmt"
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"html/template"
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"io/fs"
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"net/http"
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"os"
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"path"
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"regexp"
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"strings"
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"git.handmade.network/hmn/hmn/src/config"
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"git.handmade.network/hmn/hmn/src/hmnurl"
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"git.handmade.network/hmn/hmn/src/templates"
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)
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func CineraIndex(c *RequestContext) ResponseData {
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topic := c.PathParams["topic"]
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slug := c.CurrentProject.Slug
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_, foundTopic := topicsForProject(slug, topic)
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if foundTopic == "" {
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return FourOhFour(c)
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}
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indexPath := path.Join(config.Config.EpisodeGuide.CineraOutputPath, slug, foundTopic, fmt.Sprintf("%s.index", foundTopic))
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content, err := os.ReadFile(indexPath)
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if err != nil {
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return FourOhFour(c)
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}
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var res ResponseData
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res.Write(content)
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return res
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}
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var episodeListRegex = regexp.MustCompile(`(?ism)^.*<body>(?P<guide>.*)</body>.*$`)
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type EpisodeListData struct {
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templates.BaseData
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Content template.HTML
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CurrentTopic string
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Topics []templates.Link
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}
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func EpisodeList(c *RequestContext) ResponseData {
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topic := c.PathParams["topic"]
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slug := c.CurrentProject.Slug
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defaultTopic, hasEpisodeGuide := config.Config.EpisodeGuide.Projects[slug]
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if !hasEpisodeGuide {
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return c.Redirect(hmnurl.BuildProjectHomepage(slug), http.StatusSeeOther)
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}
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if topic == "" {
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return c.Redirect(hmnurl.BuildEpisodeList(slug, defaultTopic), http.StatusSeeOther)
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}
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allTopics, foundTopic := topicsForProject(slug, topic)
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if foundTopic == "" {
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return FourOhFour(c)
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}
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htmlPath := path.Join(config.Config.EpisodeGuide.CineraOutputPath, slug, foundTopic, "index.html")
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htmlContent, err := os.ReadFile(htmlPath)
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if err != nil {
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return FourOhFour(c)
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}
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matches := episodeListRegex.FindStringSubmatch(string(htmlContent))
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if matches == nil || matches[episodeListRegex.SubexpIndex("guide")] == "" {
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c.Logger.Error().Str("Filename", htmlPath).Msg("Episode guide index.html can't be parsed.")
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return FourOhFour(c)
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}
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guide := matches[episodeListRegex.SubexpIndex("guide")]
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var topicLinks []templates.Link
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for _, t := range allTopics {
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url := ""
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if t != foundTopic {
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url = hmnurl.BuildEpisodeList(slug, t)
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}
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topicLinks = append(topicLinks, templates.Link{LinkText: t, Url: url})
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}
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var res ResponseData
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baseData := getBaseData(c)
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res.MustWriteTemplate("episode_list.html", EpisodeListData{
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BaseData: baseData,
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Content: template.HTML(guide),
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CurrentTopic: foundTopic,
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Topics: topicLinks,
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}, c.Perf)
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return res
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}
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var episodeTitleRegex = regexp.MustCompile(`(?ism)<span class="episode_name">(?P<title>.*?)</span>`)
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var episodeContentRegex = regexp.MustCompile(`(?ism)<body>(?P<content>.*)</body>`)
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type EpisodeData struct {
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templates.BaseData
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Content template.HTML
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}
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func Episode(c *RequestContext) ResponseData {
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episode := c.PathParams["episode"]
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topic := c.PathParams["topic"]
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slug := c.CurrentProject.Slug
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_, hasEpisodeGuide := config.Config.EpisodeGuide.Projects[slug]
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if !hasEpisodeGuide {
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return c.Redirect(hmnurl.BuildProjectHomepage(slug), http.StatusSeeOther)
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}
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_, foundTopic := topicsForProject(slug, topic)
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if foundTopic == "" {
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return FourOhFour(c)
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}
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foundEpisode := findEpisode(slug, foundTopic, episode)
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if foundEpisode == "" {
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return FourOhFour(c)
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}
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htmlPath := path.Join(config.Config.EpisodeGuide.CineraOutputPath, slug, foundTopic, "episode", foundTopic, foundEpisode, "index.html")
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htmlContent, err := os.ReadFile(htmlPath)
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if err != nil {
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return FourOhFour(c)
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}
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titleMatches := episodeTitleRegex.FindStringSubmatch(string(htmlContent))
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title := fmt.Sprintf("%s Episode Guide", c.CurrentProject.Name)
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if titleMatches != nil && titleMatches[episodeTitleRegex.SubexpIndex("title")] != "" {
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title = fmt.Sprintf("%s | %s", titleMatches[episodeTitleRegex.SubexpIndex("title")], title)
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}
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contentMatches := episodeContentRegex.FindStringSubmatch(string(htmlContent))
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if contentMatches == nil || contentMatches[episodeContentRegex.SubexpIndex("content")] == "" {
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c.Logger.Error().Str("filename", htmlPath).Msg("Episode file can't be parsed.")
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return FourOhFour(c)
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}
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content := contentMatches[episodeContentRegex.SubexpIndex("content")]
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var res ResponseData
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baseData := getBaseData(c)
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baseData.Title = title
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res.MustWriteTemplate("episode.html", EpisodeData{
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BaseData: baseData,
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Content: template.HTML(content),
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}, c.Perf)
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return res
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}
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func topicsForProject(projectSlug string, requestedTopic string) ([]string, string) {
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searchPath := path.Join(config.Config.EpisodeGuide.CineraOutputPath, projectSlug)
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entries, err := fs.ReadDir(os.DirFS(searchPath), ".")
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if err != nil {
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return nil, ""
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}
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var allTopics []string
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foundTopic := ""
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for _, entry := range entries {
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if entry.IsDir() {
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t := entry.Name()
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allTopics = append(allTopics, t)
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if strings.ToLower(t) == strings.ToLower(requestedTopic) {
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foundTopic = t
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}
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}
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}
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return allTopics, foundTopic
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}
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// NOTE(asaf): Assuming topic is valid. Please verify before calling.
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func findEpisode(projectSlug string, topic string, requestedEpisode string) string {
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searchPath := path.Join(config.Config.EpisodeGuide.CineraOutputPath, projectSlug, topic, "episode", topic) // NOTE(asaf): Yes. We have `topic` twice in the path.
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entries, err := fs.ReadDir(os.DirFS(searchPath), ".")
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if err != nil {
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return ""
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}
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for _, entry := range entries {
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if entry.IsDir() {
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episode := entry.Name()
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if strings.ToLower(episode) == strings.ToLower(requestedEpisode) {
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return episode
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}
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}
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}
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return ""
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}
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