78 lines
2.1 KiB
Go
78 lines
2.1 KiB
Go
package markdown
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import (
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"fmt"
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"github.com/andrew/go-computer/internal/db"
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"net/http"
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"regexp"
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"strings"
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)
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var slugRE = regexp.MustCompile(`[^a-z0-9]+`)
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func Slugify(s string) string {
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s = strings.Trim(slugRE.ReplaceAllString(strings.ToLower(s), "-"), "-")
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if len(s) > 60 {
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s = s[:60]
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}
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if s == "" {
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s = "untitled"
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}
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return s
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}
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func text(b db.Object, k string) string { s, _ := b[k].(string); return s }
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func BookmarkDocument(b db.Object) string {
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title := text(b, "title")
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if title == "" {
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title = text(b, "url")
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}
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out := "# " + title + "\n\n- URL: " + text(b, "url") + "\n"
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if s := text(b, "dueDate"); len(s) >= 10 {
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out += "- Date: " + s[:10] + "\n"
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}
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tags := []string{}
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if a, ok := b["tags"].([]any); ok {
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for _, x := range a {
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bt, _ := x.(map[string]any)
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t, _ := bt["tag"].(map[string]any)
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tags = append(tags, text(t, "name"))
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}
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}
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if len(tags) > 0 {
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out += "- Tags: " + strings.Join(tags, ", ") + "\n"
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}
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return out + "\n" + strings.TrimSpace(text(b, "notes")) + "\n"
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}
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func PageDocument(p db.Object) string {
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out := "# " + text(p, "title") + "\n\n" + strings.TrimSpace(text(p, "content")) + "\n"
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if a, ok := p["bookmarks"].([]any); ok && len(a) > 0 {
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out += "\n## Links\n"
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for _, x := range a {
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pb, _ := x.(map[string]any)
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b, _ := pb["bookmark"].(map[string]any)
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title := text(b, "title")
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if title == "" {
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title = text(b, "url")
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}
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title = strings.NewReplacer("[", "", "]", "", "\n", " ").Replace(title)
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desc := strings.Join(strings.Fields(text(b, "description")), " ")
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rs := []rune(desc)
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if len(rs) > 160 {
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desc = string(rs[:160])
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}
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out += "- [" + title + "](" + text(b, "url") + ")"
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if desc != "" {
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out += " — " + desc
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}
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out += "\n"
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}
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}
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return out + "\n<!-- exported from computer " + text(p, "updatedAt") + " -->\n"
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}
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func Send(w http.ResponseWriter, body, name string) {
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w.Header().Set("Content-Type", "text/markdown; charset=utf-8")
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w.Header().Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s.md"`, Slugify(name)))
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w.Header().Set("Cache-Control", "no-store")
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_, _ = w.Write([]byte(body))
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}
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