487 lines
13 KiB
Go
487 lines
13 KiB
Go
package website
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import (
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"context"
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"errors"
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"fmt"
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"html/template"
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"net/http"
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"net/url"
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"regexp"
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"strconv"
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"strings"
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"time"
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"git.handmade.network/hmn/hmn/src/db"
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"git.handmade.network/hmn/hmn/src/hmnurl"
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"git.handmade.network/hmn/hmn/src/models"
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"git.handmade.network/hmn/hmn/src/parsing"
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"git.handmade.network/hmn/hmn/src/templates"
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"git.handmade.network/hmn/hmn/src/utils"
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)
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func EducationIndex(c *RequestContext) ResponseData {
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type indexData struct {
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templates.BaseData
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Articles []templates.EduArticle
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NewArticleUrl string
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RerenderUrl string
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}
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articles, err := fetchEduArticles(c, c.Conn, models.EduArticleTypeArticle, c.CurrentUser)
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if err != nil {
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panic(err)
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}
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var tmplArticles []templates.EduArticle
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for _, article := range articles {
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tmplArticles = append(tmplArticles, templates.EducationArticleToTemplate(&article))
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}
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tmpl := indexData{
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BaseData: getBaseData(c, "Handmade Education", nil),
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Articles: tmplArticles,
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NewArticleUrl: hmnurl.BuildEducationArticleNew(),
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RerenderUrl: hmnurl.BuildEducationRerender(),
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}
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var res ResponseData
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res.MustWriteTemplate("education_index.html", tmpl, c.Perf)
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return res
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}
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func EducationGlossary(c *RequestContext) ResponseData {
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type glossaryData struct {
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templates.BaseData
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}
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tmpl := glossaryData{
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BaseData: getBaseData(c, "Handmade Education", nil),
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}
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var res ResponseData
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res.MustWriteTemplate("education_glossary.html", tmpl, c.Perf)
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return res
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}
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var reEduEditorsNote = regexp.MustCompile(`<span\s*class="note".*?>.*?</span>`)
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func EducationArticle(c *RequestContext) ResponseData {
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type articleData struct {
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templates.BaseData
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Article templates.EduArticle
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TOC []TOCEntry
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EditUrl string
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DeleteUrl string
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}
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article, err := fetchEduArticle(c, c.Conn, c.PathParams["slug"], models.EduArticleTypeArticle, c.CurrentUser)
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if errors.Is(err, db.NotFound) {
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return FourOhFour(c)
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} else if err != nil {
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return c.ErrorResponse(http.StatusInternalServerError, err)
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}
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tmpl := articleData{
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BaseData: getBaseData(c, article.Title, nil),
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Article: templates.EducationArticleToTemplate(article),
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EditUrl: hmnurl.BuildEducationArticleEdit(article.Slug),
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DeleteUrl: hmnurl.BuildEducationArticleDelete(article.Slug),
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}
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tmpl.OpenGraphItems = append(tmpl.OpenGraphItems,
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templates.OpenGraphItem{Property: "og:description", Value: string(article.Description)},
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)
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tmpl.Breadcrumbs = []templates.Breadcrumb{
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{Name: "Education", Url: hmnurl.BuildEducationIndex()},
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{Name: article.Title, Url: hmnurl.BuildEducationArticle(article.Slug)},
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}
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// Remove editor's notes
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if c.CurrentUser == nil || !c.CurrentUser.CanAuthorEducation() {
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tmpl.Article.Content = template.HTML(reEduEditorsNote.ReplaceAllLiteralString(string(tmpl.Article.Content), ""))
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}
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// Generate TOC and stuff I dunno
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html, tocEntries := generateTOC(string(tmpl.Article.Content))
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tmpl.Article.Content = template.HTML(html)
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tmpl.TOC = tocEntries
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var res ResponseData
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res.MustWriteTemplate("education_article.html", tmpl, c.Perf)
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return res
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}
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func EducationArticleNew(c *RequestContext) ResponseData {
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type adminData struct {
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editorData
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Article map[string]interface{}
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}
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tmpl := adminData{
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editorData: getEditorDataForEduArticle(c.UrlContext, c.CurrentUser, getBaseData(c, "New Education Article", nil), nil),
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}
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tmpl.editorData.SubmitUrl = hmnurl.BuildEducationArticleNew()
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var res ResponseData
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res.MustWriteTemplate("editor.html", tmpl, c.Perf)
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return res
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}
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func EducationArticleNewSubmit(c *RequestContext) ResponseData {
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form, err := c.GetFormValues()
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if err != nil {
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return c.ErrorResponse(http.StatusBadRequest, err)
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}
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art, ver := getEduArticleFromForm(form)
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dupe := 0 < db.MustQueryOneScalar[int](c, c.Conn,
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`
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SELECT COUNT(*) FROM education_article
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WHERE slug = $1
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`,
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art.Slug,
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)
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if dupe {
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return c.RejectRequest("A resource already exists with that slug.")
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}
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createEduArticle(c, art, ver)
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res := c.Redirect(eduArticleURL(&art), http.StatusSeeOther)
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res.AddFutureNotice("success", "Created new education article.")
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return res
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}
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func EducationArticleEdit(c *RequestContext) ResponseData {
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type adminData struct {
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editorData
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Article templates.EduArticle
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}
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article, err := fetchEduArticle(c, c.Conn, c.PathParams["slug"], 0, c.CurrentUser)
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if errors.Is(err, db.NotFound) {
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return FourOhFour(c)
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} else if err != nil {
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panic(err)
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}
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tmpl := adminData{
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editorData: getEditorDataForEduArticle(c.UrlContext, c.CurrentUser, getBaseData(c, "Edit Education Article", nil), article),
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Article: templates.EducationArticleToTemplate(article),
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}
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tmpl.editorData.SubmitUrl = hmnurl.BuildEducationArticleEdit(c.PathParams["slug"])
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var res ResponseData
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res.MustWriteTemplate("editor.html", tmpl, c.Perf)
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return res
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}
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func EducationArticleEditSubmit(c *RequestContext) ResponseData {
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form, err := c.GetFormValues()
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if err != nil {
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return c.ErrorResponse(http.StatusBadRequest, err)
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}
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_, err = fetchEduArticle(c, c.Conn, c.PathParams["slug"], 0, c.CurrentUser)
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if errors.Is(err, db.NotFound) {
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return FourOhFour(c)
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} else if err != nil {
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panic(err)
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}
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art, ver := getEduArticleFromForm(form)
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updateEduArticle(c, c.PathParams["slug"], art, ver)
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res := c.Redirect(eduArticleURL(&art), http.StatusSeeOther)
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res.AddFutureNotice("success", "Edited education article.")
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return res
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}
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func EducationArticleDelete(c *RequestContext) ResponseData {
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article, err := fetchEduArticle(c, c.Conn, c.PathParams["slug"], 0, c.CurrentUser)
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if errors.Is(err, db.NotFound) {
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return FourOhFour(c)
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} else if err != nil {
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panic(err)
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}
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type deleteData struct {
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templates.BaseData
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Article templates.EduArticle
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SubmitUrl string
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}
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baseData := getBaseData(c, fmt.Sprintf("Deleting \"%s\"", article.Title), nil)
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var res ResponseData
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res.MustWriteTemplate("education_article_delete.html", deleteData{
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BaseData: baseData,
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Article: templates.EducationArticleToTemplate(article),
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SubmitUrl: hmnurl.BuildEducationArticleDelete(article.Slug),
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}, c.Perf)
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return res
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}
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func EducationArticleDeleteSubmit(c *RequestContext) ResponseData {
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_, err := c.Conn.Exec(c, `DELETE FROM education_article WHERE slug = $1`, c.PathParams["slug"])
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if err != nil {
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panic(err)
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}
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res := c.Redirect(hmnurl.BuildEducationIndex(), http.StatusSeeOther)
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res.AddFutureNotice("success", "Article deleted.")
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return res
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}
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func EducationRerender(c *RequestContext) ResponseData {
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everything := utils.Must1(fetchEduArticles(c, c.Conn, 0, c.CurrentUser))
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for _, thing := range everything {
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newHTML := parsing.ParseMarkdown(thing.CurrentVersion.ContentRaw, parsing.EducationRealMarkdown)
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utils.Must1(c.Conn.Exec(c,
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`
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UPDATE education_article_version
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SET content_html = $2
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WHERE id = $1
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`,
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thing.CurrentVersionID,
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newHTML,
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))
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}
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res := c.Redirect(hmnurl.BuildEducationIndex(), http.StatusSeeOther)
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res.AddFutureNotice("success", "Rerendered all education content.")
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return res
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}
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func fetchEduArticles(
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ctx context.Context,
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dbConn db.ConnOrTx,
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t models.EduArticleType,
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currentUser *models.User,
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) ([]models.EduArticle, error) {
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type eduArticleResult struct {
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Article models.EduArticle `db:"a"`
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CurrentVersion models.EduArticleVersion `db:"v"`
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}
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var qb db.QueryBuilder
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qb.Add(`
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SELECT $columns
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FROM
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education_article AS a
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JOIN education_article_version AS v ON a.current_version = v.id
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WHERE
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TRUE
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`)
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if t != 0 {
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qb.Add(`AND a.type = $?`, t)
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}
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if currentUser == nil || !currentUser.CanSeeUnpublishedEducationContent() {
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qb.Add(`AND NOT a.published`)
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}
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articles, err := db.Query[eduArticleResult](ctx, dbConn, qb.String(), qb.Args()...)
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if err != nil {
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return nil, err
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}
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var res []models.EduArticle
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for _, article := range articles {
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ver := article.CurrentVersion
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article.Article.CurrentVersion = &ver
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res = append(res, article.Article)
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}
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return res, nil
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}
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func fetchEduArticle(
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ctx context.Context,
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dbConn db.ConnOrTx,
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slug string,
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t models.EduArticleType,
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currentUser *models.User,
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) (*models.EduArticle, error) {
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type eduArticleResult struct {
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Article models.EduArticle `db:"a"`
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CurrentVersion models.EduArticleVersion `db:"v"`
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}
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var qb db.QueryBuilder
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qb.Add(
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`
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SELECT $columns
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FROM
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education_article AS a
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JOIN education_article_version AS v ON a.current_version = v.id
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WHERE
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a.slug = $?
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`,
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slug,
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)
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if t != 0 {
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qb.Add(`AND a.type = $?`, t)
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}
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if currentUser == nil || !currentUser.CanSeeUnpublishedEducationContent() {
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qb.Add(`AND NOT a.published`)
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}
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res, err := db.QueryOne[eduArticleResult](ctx, dbConn, qb.String(), qb.Args()...)
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if err != nil {
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return nil, err
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}
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res.Article.CurrentVersion = &res.CurrentVersion
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return &res.Article, nil
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}
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func getEditorDataForEduArticle(
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urlContext *hmnurl.UrlContext,
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currentUser *models.User,
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baseData templates.BaseData,
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article *models.EduArticle,
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) editorData {
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result := editorData{
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BaseData: baseData,
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SubmitLabel: "Submit",
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CanEditPostTitle: true,
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ShowEduOptions: true,
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PreviewClass: "edu-article",
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TextEditor: templates.TextEditor{
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ParserName: "parseMarkdownEdu",
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MaxFileSize: AssetMaxSize(currentUser),
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UploadUrl: urlContext.BuildAssetUpload(),
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},
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}
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if article != nil {
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result.PostTitle = article.Title
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result.EditInitialContents = article.CurrentVersion.ContentRaw
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}
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return result
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}
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func getEduArticleFromForm(form url.Values) (art models.EduArticle, ver models.EduArticleVersion) {
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art.Title = form.Get("title")
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art.Slug = form.Get("slug")
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art.Description = form.Get("description")
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switch form.Get("type") {
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case "article":
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art.Type = models.EduArticleTypeArticle
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case "glossary":
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art.Type = models.EduArticleTypeGlossary
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default:
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panic(fmt.Errorf("unknown education article type: %s", form.Get("type")))
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}
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art.Published = form.Get("published") != ""
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ver.ContentRaw = form.Get("body")
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ver.ContentHTML = parsing.ParseMarkdown(ver.ContentRaw, parsing.EducationRealMarkdown)
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return
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}
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func createEduArticle(c *RequestContext, art models.EduArticle, ver models.EduArticleVersion) {
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tx := utils.Must1(c.Conn.Begin(c))
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defer tx.Rollback(c)
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{
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articleID := db.MustQueryOneScalar[int](c, tx,
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`
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INSERT INTO education_article (title, slug, description, published, type, current_version)
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VALUES ($1, $2, $3, $4, $5, -1)
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RETURNING id
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`,
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art.Title, art.Slug, art.Description, art.Published, art.Type,
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)
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versionID := db.MustQueryOneScalar[int](c, tx,
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`
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INSERT INTO education_article_version (article_id, date, editor_id, content_raw, content_html)
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VALUES ($1, $2, $3, $4, $5 )
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RETURNING id
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`,
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articleID, time.Now(), c.CurrentUser.ID, ver.ContentRaw, ver.ContentHTML,
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)
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tx.Exec(c,
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`UPDATE education_article SET current_version = $1 WHERE id = $2`,
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versionID, articleID,
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)
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}
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utils.Must(tx.Commit(c))
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}
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func updateEduArticle(c *RequestContext, slug string, art models.EduArticle, ver models.EduArticleVersion) {
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tx := utils.Must1(c.Conn.Begin(c))
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defer tx.Rollback(c)
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{
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articleID := db.MustQueryOneScalar[int](c, tx,
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`SELECT id FROM education_article WHERE slug = $1`,
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slug,
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)
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versionID := db.MustQueryOneScalar[int](c, tx,
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`
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INSERT INTO education_article_version (article_id, date, editor_id, content_raw, content_html)
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VALUES ($1, $2, $3, $4, $5 )
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RETURNING id
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`,
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articleID, time.Now(), c.CurrentUser.ID, ver.ContentRaw, ver.ContentHTML,
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)
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tx.Exec(c,
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`
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UPDATE education_article
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SET
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title = $1, slug = $2, description = $3, published = $4, type = $5,
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current_version = $6
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WHERE
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id = $7
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`,
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art.Title, art.Slug, art.Description, art.Published, art.Type,
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versionID,
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articleID,
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)
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}
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utils.Must(tx.Commit(c))
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}
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func eduArticleURL(a *models.EduArticle) string {
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switch a.Type {
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case models.EduArticleTypeArticle:
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return hmnurl.BuildEducationArticle(a.Slug)
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case models.EduArticleTypeGlossary:
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return hmnurl.BuildEducationGlossary(a.Slug)
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default:
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panic("unknown education article type")
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}
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}
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var reHeading = regexp.MustCompile(`<h([1-6])>(.*?)</h[1-6]>`)
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var reNotSimple = regexp.MustCompile(`[^a-zA-Z0-9-_]+`)
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type TOCEntry struct {
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Text string
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ID string
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Level int
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}
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func generateTOC(html string) (string, []TOCEntry) {
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var entries []TOCEntry
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replacinated := reHeading.ReplaceAllStringFunc(html, func(s string) string {
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m := reHeading.FindStringSubmatch(s)
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level := m[1]
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content := m[2]
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id := strings.ToLower(reNotSimple.ReplaceAllLiteralString(content, "-"))
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entries = append(entries, TOCEntry{
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Text: content,
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ID: id,
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Level: utils.Must1(strconv.Atoi(level)),
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})
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return fmt.Sprintf(`<h%s id="%s">%s</h%s>`, level, id, content, level)
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})
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return replacinated, entries
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}
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