mirror of https://github.com/jlelse/GoBlog
80 lines
1.9 KiB
Go
80 lines
1.9 KiB
Go
package main
|
|
|
|
import (
|
|
"context"
|
|
"database/sql"
|
|
"errors"
|
|
"net/http"
|
|
)
|
|
|
|
var errPostNotFound = errors.New("post not found")
|
|
|
|
type Post struct {
|
|
Path string
|
|
Content string
|
|
Published string
|
|
Updated string
|
|
Parameters map[string]string
|
|
}
|
|
|
|
func servePost(w http.ResponseWriter, r *http.Request) {
|
|
path := slashTrimmedPath(r)
|
|
post, err := getPost(r.Context(), path)
|
|
if err == errPostNotFound {
|
|
http.NotFound(w, r)
|
|
return
|
|
} else if err != nil {
|
|
http.Error(w, err.Error(), http.StatusInternalServerError)
|
|
return
|
|
}
|
|
err = templates.ExecuteTemplate(w, templatePostName, post)
|
|
if err != nil {
|
|
http.Error(w, err.Error(), http.StatusInternalServerError)
|
|
}
|
|
}
|
|
|
|
func getPost(context context.Context, path string) (*Post, error) {
|
|
queriedPost := &Post{}
|
|
row := appDb.QueryRowContext(context, "select path, COALESCE(content, ''), COALESCE(published, ''), COALESCE(updated, '') from posts where path=?", path)
|
|
err := row.Scan(&queriedPost.Path, &queriedPost.Content, &queriedPost.Published, &queriedPost.Updated)
|
|
if err == sql.ErrNoRows {
|
|
return nil, errPostNotFound
|
|
} else if err != nil {
|
|
return nil, err
|
|
}
|
|
err = queriedPost.fetchParameters(context)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return queriedPost, nil
|
|
}
|
|
|
|
func (p *Post) fetchParameters(context context.Context) error {
|
|
rows, err := appDb.QueryContext(context, "select parameter, COALESCE(value, '') from post_parameters where path=?", p.Path)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
p.Parameters = make(map[string]string)
|
|
for rows.Next() {
|
|
var parameter string
|
|
var value string
|
|
_ = rows.Scan(¶meter, &value)
|
|
p.Parameters[parameter] = value
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func allPostPaths() ([]string, error) {
|
|
var postPaths []string
|
|
rows, err := appDb.Query("select path from posts")
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
for rows.Next() {
|
|
var path string
|
|
_ = rows.Scan(&path)
|
|
postPaths = append(postPaths, path)
|
|
}
|
|
return postPaths, nil
|
|
}
|