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|
package db
import (
"database/sql"
"encoding/json"
"time"
)
type PostRecord struct {
Id string
Slug string
Title string
Date string
Tags []string
Draft bool
Blocks string // raw EditorJS JSON
UpdatedAt int64 // Unix microseconds
}
func (d *DB) UpsertPost(p PostRecord) error {
tags, _ := json.Marshal(p.Tags)
draft := 0
if p.Draft {
draft = 1
}
_, err := d.db.Exec(`
INSERT INTO posts (slug, title, date, tags, draft, blocks, updated_at)
VALUES (?, ?, ?, ?, ?, ?, ?)
ON CONFLICT(slug) DO UPDATE SET
title = excluded.title,
date = excluded.date,
tags = excluded.tags,
draft = excluded.draft,
blocks = excluded.blocks,
updated_at = excluded.updated_at
`, p.Slug, p.Title, p.Date, string(tags), draft, p.Blocks, p.UpdatedAt)
return err
}
func (d *DB) GetPostBySlug(slug string) (*PostRecord, error) {
row := d.db.QueryRow(
`SELECT id, slug, title, date, tags, draft, blocks, updated_at FROM posts WHERE slug = ?`, slug)
var p PostRecord
var tagsJSON string
var draft int
if err := row.Scan(&p.Id, &p.Slug, &p.Title, &p.Date, &tagsJSON, &draft, &p.Blocks, &p.UpdatedAt); err != nil {
return nil, err
}
p.Draft = draft != 0
_ = json.Unmarshal([]byte(tagsJSON), &p.Tags)
if p.Tags == nil {
p.Tags = []string{}
}
return &p, nil
}
func (d *DB) GetPostById(id string) (*PostRecord, error) {
row := d.db.QueryRow(
`SELECT id, slug, title, date, tags, draft, blocks, updated_at FROM posts WHERE id = ?`, id)
var p PostRecord
var tagsJSON string
var draft int
if err := row.Scan(&p.Id, &p.Slug, &p.Title, &p.Date, &tagsJSON, &draft, &p.Blocks, &p.UpdatedAt); err != nil {
return nil, err
}
p.Draft = draft != 0
_ = json.Unmarshal([]byte(tagsJSON), &p.Tags)
if p.Tags == nil {
p.Tags = []string{}
}
return &p, nil
}
func (d *DB) ListPosts(includeDrafts bool) ([]PostRecord, error) {
query := `SELECT id, slug, title, date, tags, draft, blocks, updated_at FROM posts`
if !includeDrafts {
query += ` WHERE draft = 0`
}
query += ` ORDER BY date DESC, slug`
rows, err := d.db.Query(query)
if err != nil {
return nil, err
}
defer rows.Close()
return scanPosts(rows)
}
func (d *DB) DeletePostBySlug(slug string) error {
_, err := d.db.Exec(`DELETE FROM posts WHERE slug = ?`, slug)
return err
}
func (d *DB) DeletePostById(id string) error {
_, err := d.db.Exec(`DELETE FROM posts WHERE id = ?`, id)
return err
}
func scanPosts(rows *sql.Rows) ([]PostRecord, error) {
var posts []PostRecord
for rows.Next() {
var p PostRecord
var tagsJSON string
var draft int
if err := rows.Scan(&p.Id, &p.Slug, &p.Title, &p.Date, &tagsJSON, &draft, &p.Blocks, &p.UpdatedAt); err != nil {
return nil, err
}
p.Draft = draft != 0
_ = json.Unmarshal([]byte(tagsJSON), &p.Tags)
if p.Tags == nil {
p.Tags = []string{}
}
posts = append(posts, p)
}
return posts, rows.Err()
}
func (p *PostRecord) GetPostRawPath() string {
return "/" + p.Slug
}
func (p *PostRecord) GetUpdatedTime() time.Time {
return time.UnixMicro(p.UpdatedAt).UTC()
}
func (d *DB) AddRedirect(fromSlug, toSlug string) error {
_, err := d.db.Exec(
`INSERT INTO redirects (from_slug, to_slug) VALUES (?, ?)
ON CONFLICT(from_slug) DO UPDATE SET to_slug = excluded.to_slug`,
fromSlug, toSlug,
)
return err
}
func (d *DB) GetRedirect(fromSlug string) (string, error) {
var toSlug string
err := d.db.QueryRow(
`SELECT to_slug FROM redirects WHERE from_slug = ?`, fromSlug,
).Scan(&toSlug)
return toSlug, err
}
func (d *DB) CollapseRedirects(oldSlug, newSlug string) error {
_, err := d.db.Exec(
`UPDATE redirects SET to_slug = ? WHERE to_slug = ?`, newSlug, oldSlug,
)
return err
}
func (d *DB) RenamePost(oldSlug, newSlug string) error {
if oldSlug == newSlug {
return nil
}
tx, err := d.db.Begin()
if err != nil {
return err
}
defer tx.Rollback()
var p PostRecord
var tagsJSON string
var draft int
row := tx.QueryRow(
`SELECT slug, title, date, tags, draft, blocks, updated_at FROM posts WHERE slug = ?`, oldSlug)
if err := row.Scan(&p.Slug, &p.Title, &p.Date, &tagsJSON, &draft, &p.Blocks, &p.UpdatedAt); err != nil {
return err
}
p.Draft = draft != 0
_ = json.Unmarshal([]byte(tagsJSON), &p.Tags)
tags, _ := json.Marshal(p.Tags)
draftInt := 0
if p.Draft {
draftInt = 1
}
_, err = tx.Exec(`
INSERT INTO posts (slug, title, date, tags, draft, blocks, updated_at)
VALUES (?, ?, ?, ?, ?, ?, ?)`,
newSlug, p.Title, p.Date, string(tags), draftInt, p.Blocks, p.UpdatedAt,
)
if err != nil {
return err
}
if _, err = tx.Exec(`DELETE FROM posts WHERE slug = ?`, oldSlug); err != nil {
return err
}
if _, err = tx.Exec(
`UPDATE redirects SET to_slug = ? WHERE to_slug = ?`, newSlug, oldSlug,
); err != nil {
return err
}
if _, err = tx.Exec(`
INSERT INTO redirects (from_slug, to_slug) VALUES (?, ?)
ON CONFLICT(from_slug) DO UPDATE SET to_slug = excluded.to_slug`,
oldSlug, newSlug,
); err != nil {
return err
}
return tx.Commit()
}
func (d *DB) RenameAndUpsertPost(oldSlug string, p PostRecord) error {
if oldSlug == p.Slug {
return d.UpsertPost(p)
}
tx, err := d.db.Begin()
if err != nil {
return err
}
defer tx.Rollback()
tags, _ := json.Marshal(p.Tags)
draftInt := 0
if p.Draft {
draftInt = 1
}
if _, err = tx.Exec(`
INSERT INTO posts (slug, title, date, tags, draft, blocks, updated_at)
VALUES (?, ?, ?, ?, ?, ?, ?)`,
p.Slug, p.Title, p.Date, string(tags), draftInt, p.Blocks, p.UpdatedAt,
); err != nil {
return err
}
if _, err = tx.Exec(`DELETE FROM posts WHERE slug = ?`, oldSlug); err != nil {
return err
}
if _, err = tx.Exec(
`UPDATE redirects SET to_slug = ? WHERE to_slug = ?`, p.Slug, oldSlug,
); err != nil {
return err
}
if _, err = tx.Exec(`
INSERT INTO redirects (from_slug, to_slug) VALUES (?, ?)
ON CONFLICT(from_slug) DO UPDATE SET to_slug = excluded.to_slug`,
oldSlug, p.Slug,
); err != nil {
return err
}
return tx.Commit()
}
|
