move src out of srv, clean up default.nix and Makefile

1 files changed, 0 insertions, 368 deletions

diff --git a/srv/src/post/post.go b/srv/src/post/post.go
deleted file mode 100644
index 03bce6c..0000000
--- a/srv/src/post/post.go
+++ /dev/null
@@ -1,368 +0,0 @@
-// Package post deals with the storage and rendering of blog posts.
-package post
-
-import (
-	"database/sql"
-	"errors"
-	"fmt"
-	"regexp"
-	"strings"
-	"time"
-)
-
-var (
-	// ErrPostNotFound is used to indicate a Post could not be found in the
-	// Store.
-	ErrPostNotFound = errors.New("post not found")
-)
-
-var titleCleanRegexp = regexp.MustCompile(`[^a-z ]`)
-
-// NewID generates a (hopefully) unique ID based on the given title.
-func NewID(title string) string {
-	title = strings.ToLower(title)
-	title = titleCleanRegexp.ReplaceAllString(title, "")
-	title = strings.ReplaceAll(title, " ", "-")
-	return title
-}
-
-// Post contains all information having to do with a blog post.
-type Post struct {
-	ID          string
-	Title       string
-	Description string
-	Tags        []string // only alphanumeric supported
-	Series      string
-	Body        string
-}
-
-// StoredPost is a Post which has been stored in a Store, and has been given
-// some extra fields as a result.
-type StoredPost struct {
-	Post
-
-	PublishedAt   time.Time
-	LastUpdatedAt time.Time
-}
-
-// Store is used for storing posts to a persistent storage.
-type Store interface {
-
-	// Set sets the Post data into the storage, keyed by the Post's ID. If there
-	// was not a previously existing Post with the same ID then Set returns
-	// true. It overwrites the previous Post with the same ID otherwise.
-	Set(post Post, now time.Time) (bool, error)
-
-	// Get returns count StoredPosts, sorted time descending, offset by the
-	// given page number. The returned boolean indicates if there are more pages
-	// or not.
-	Get(page, count int) ([]StoredPost, bool, error)
-
-	// GetByID will return the StoredPost with the given ID, or ErrPostNotFound.
-	GetByID(id string) (StoredPost, error)
-
-	// GetBySeries returns all StoredPosts with the given series, sorted time
-	// descending, or empty slice.
-	GetBySeries(series string) ([]StoredPost, error)
-
-	// GetByTag returns all StoredPosts with the given tag, sorted time
-	// descending, or empty slice.
-	GetByTag(tag string) ([]StoredPost, error)
-
-	// GetTags returns all tags which have at least one Post using them.
-	GetTags() ([]string, error)
-
-	// Delete will delete the StoredPost with the given ID.
-	Delete(id string) error
-}
-
-type store struct {
-	db *SQLDB
-}
-
-// NewStore initializes a new Store using an existing SQLDB.
-func NewStore(db *SQLDB) Store {
-	return &store{
-		db: db,
-	}
-}
-
-func (s *store) Set(post Post, now time.Time) (bool, error) {
-
-	if post.ID == "" {
-		return false, errors.New("post ID can't be empty")
-	}
-
-	var first bool
-
-	err := s.db.withTx(func(tx *sql.Tx) error {
-
-		nowTS := now.Unix()
-
-		nowSQL := sql.NullInt64{Int64: nowTS, Valid: !now.IsZero()}
-
-		_, err := tx.Exec(
-			`INSERT INTO posts (
-				id, title, description, series, published_at, body
-			)
-			VALUES
-			(?, ?, ?, ?, ?, ?)
-			ON CONFLICT (id) DO UPDATE SET
-				title=excluded.title,
-				description=excluded.description,
-				series=excluded.series,
-				last_updated_at=?,
-				body=excluded.body`,
-			post.ID,
-			post.Title,
-			post.Description,
-			&sql.NullString{String: post.Series, Valid: post.Series != ""},
-			nowSQL,
-			post.Body,
-			nowSQL,
-		)
-
-		if err != nil {
-			return fmt.Errorf("inserting into posts: %w", err)
-		}
-
-		// this is a bit of a hack, but it allows us to update the tagset without
-		// doing a diff.
-		_, err = tx.Exec(`DELETE FROM post_tags WHERE post_id = ?`, post.ID)
-
-		if err != nil {
-			return fmt.Errorf("clearning post tags: %w", err)
-		}
-
-		for _, tag := range post.Tags {
-
-			_, err = tx.Exec(
-				`INSERT INTO post_tags (post_id, tag) VALUES (?, ?)
-			ON CONFLICT DO NOTHING`,
-				post.ID,
-				tag,
-			)
-
-			if err != nil {
-				return fmt.Errorf("inserting tag %q: %w", tag, err)
-			}
-		}
-
-		err = tx.QueryRow(
-			`SELECT 1 FROM posts WHERE id=? AND last_updated_at IS NULL`,
-			post.ID,
-		).Scan(new(int))
-
-		first = !errors.Is(err, sql.ErrNoRows)
-
-		return nil
-	})
-
-	return first, err
-}
-
-func (s *store) get(
-	querier interface {
-		Query(string, ...interface{}) (*sql.Rows, error)
-	},
-	limit, offset int,
-	where string, whereArgs ...interface{},
-) (
-	[]StoredPost, error,
-) {
-
-	query := `
-		SELECT
-			p.id, p.title, p.description, p.series, GROUP_CONCAT(pt.tag),
-			p.published_at, p.last_updated_at,
-			p.body
-		FROM posts p
-		LEFT JOIN post_tags pt ON (p.id = pt.post_id)
-		` + where + `
-		GROUP BY (p.id)
-		ORDER BY p.published_at DESC, p.title DESC`
-
-	if limit > 0 {
-		query += fmt.Sprintf(" LIMIT %d", limit)
-	}
-
-	if offset > 0 {
-		query += fmt.Sprintf(" OFFSET %d", offset)
-	}
-
-	rows, err := querier.Query(query, whereArgs...)
-
-	if err != nil {
-		return nil, fmt.Errorf("selecting: %w", err)
-	}
-
-	var posts []StoredPost
-
-	for rows.Next() {
-
-		var (
-			post                       StoredPost
-			series, tag                sql.NullString
-			publishedAt, lastUpdatedAt sql.NullInt64
-		)
-
-		err := rows.Scan(
-			&post.ID, &post.Title, &post.Description, &series, &tag,
-			&publishedAt, &lastUpdatedAt,
-			&post.Body,
-		)
-
-		if err != nil {
-			return nil, fmt.Errorf("scanning row: %w", err)
-		}
-
-		post.Series = series.String
-
-		if tag.String != "" {
-			post.Tags = strings.Split(tag.String, ",")
-		}
-
-		if publishedAt.Valid {
-			post.PublishedAt = time.Unix(publishedAt.Int64, 0).UTC()
-		}
-
-		if lastUpdatedAt.Valid {
-			post.LastUpdatedAt = time.Unix(lastUpdatedAt.Int64, 0).UTC()
-		}
-
-		posts = append(posts, post)
-	}
-
-	if err := rows.Close(); err != nil {
-		return nil, fmt.Errorf("closing row iterator: %w", err)
-	}
-
-	return posts, nil
-}
-
-func (s *store) Get(page, count int) ([]StoredPost, bool, error) {
-
-	posts, err := s.get(s.db.db, count+1, page*count, ``)
-
-	if err != nil {
-		return nil, false, fmt.Errorf("querying posts: %w", err)
-	}
-
-	var hasMore bool
-
-	if len(posts) > count {
-		hasMore = true
-		posts = posts[:count]
-	}
-
-	return posts, hasMore, nil
-}
-
-func (s *store) GetByID(id string) (StoredPost, error) {
-
-	posts, err := s.get(s.db.db, 0, 0, `WHERE p.id=?`, id)
-
-	if err != nil {
-		return StoredPost{}, fmt.Errorf("querying posts: %w", err)
-	}
-
-	if len(posts) == 0 {
-		return StoredPost{}, ErrPostNotFound
-	}
-
-	if len(posts) > 1 {
-		panic(fmt.Sprintf("got back multiple posts querying id %q: %+v", id, posts))
-	}
-
-	return posts[0], nil
-}
-
-func (s *store) GetBySeries(series string) ([]StoredPost, error) {
-	return s.get(s.db.db, 0, 0, `WHERE p.series=?`, series)
-}
-
-func (s *store) GetByTag(tag string) ([]StoredPost, error) {
-
-	var posts []StoredPost
-
-	err := s.db.withTx(func(tx *sql.Tx) error {
-
-		rows, err := tx.Query(`SELECT post_id FROM post_tags WHERE tag = ?`, tag)
-
-		if err != nil {
-			return fmt.Errorf("querying post_tags by tag: %w", err)
-		}
-
-		var (
-			placeholders []string
-			whereArgs    []interface{}
-		)
-
-		for rows.Next() {
-
-			var id string
-
-			if err := rows.Scan(&id); err != nil {
-				rows.Close()
-				return fmt.Errorf("scanning id: %w", err)
-			}
-
-			whereArgs = append(whereArgs, id)
-			placeholders = append(placeholders, "?")
-		}
-
-		if err := rows.Close(); err != nil {
-			return fmt.Errorf("closing row iterator: %w", err)
-		}
-
-		where := fmt.Sprintf("WHERE p.id IN (%s)", strings.Join(placeholders, ","))
-
-		if posts, err = s.get(tx, 0, 0, where, whereArgs...); err != nil {
-			return fmt.Errorf("querying for ids %+v: %w", whereArgs, err)
-		}
-
-		return nil
-	})
-
-	return posts, err
-}
-
-func (s *store) GetTags() ([]string, error) {
-
-	rows, err := s.db.db.Query(`SELECT tag FROM post_tags GROUP BY tag`)
-	if err != nil {
-		return nil, fmt.Errorf("querying all tags: %w", err)
-	}
-	defer rows.Close()
-
-	var tags []string
-
-	for rows.Next() {
-
-		var tag string
-
-		if err := rows.Scan(&tag); err != nil {
-			return nil, fmt.Errorf("scanning tag: %w", err)
-		}
-
-		tags = append(tags, tag)
-	}
-
-	return tags, nil
-}
-
-func (s *store) Delete(id string) error {
-
-	return s.db.withTx(func(tx *sql.Tx) error {
-
-		if _, err := tx.Exec(`DELETE FROM post_tags WHERE post_id = ?`, id); err != nil {
-			return fmt.Errorf("deleting from post_tags: %w", err)
-		}
-
-		if _, err := tx.Exec(`DELETE FROM posts WHERE id = ?`, id); err != nil {
-			return fmt.Errorf("deleting from posts: %w", err)
-		}
-
-		return nil
-	})
-}