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Kenneth
eca3b95c3e
when an item is shared, their path should stop at the closest directory that is shared. eg if file c is in shared dir b which is in private dir a, its public facing path should be b/c, not a/b/c. internally, the real path is still a/b/c.
82 lines
2.1 KiB
Go
82 lines
2.1 KiB
Go
package virtualfs
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import (
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"context"
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"database/sql"
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"errors"
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"strings"
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"github.com/google/uuid"
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"github.com/uptrace/bun"
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)
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const absolutePathQuery = `WITH RECURSIVE path AS (
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SELECT id, parent_id, name, 1 as depth
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FROM vfs_nodes WHERE id = ? AND deleted_at IS NULL
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UNION ALL
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SELECT n.id, n.parent_id, n.name, p.depth + 1
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FROM vfs_nodes n
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JOIN path p ON n.id = p.parent_id
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)
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SELECT name FROM path
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WHERE EXISTS (SELECT 1 FROM path WHERE parent_id IS NULL)
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ORDER BY depth DESC;`
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const absolutePathWithPublicIDQuery = `WITH RECURSIVE path AS (
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SELECT id, parent_id, name, public_id, 1 as depth
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FROM vfs_nodes WHERE id = ? AND deleted_at IS NULL
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UNION ALL
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SELECT n.id, n.parent_id, n.name, n.public_id, p.depth + 1
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FROM vfs_nodes n
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JOIN path p ON n.id = p.parent_id
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WHERE p.id != ?
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)
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SELECT name, public_id FROM path
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WHERE EXISTS (SELECT 1 FROM path WHERE id = ?)
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ORDER BY depth DESC;`
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// Path represents a path to a node.
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type Path []PathSegment
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// PathSegment represents a segment of a path, containing the name and public ID of the node.
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type PathSegment struct {
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Name string `bun:"name" json:"name"`
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PublicID string `bun:"public_id" json:"id"`
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}
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func JoinPath(parts ...string) string {
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return strings.Join(parts, "/")
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}
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func buildNodeAbsolutePathString(ctx context.Context, db bun.IDB, node *Node) (string, error) {
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return buildPathFromNodeID(ctx, db, node.ID)
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}
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func buildPathFromNodeID(ctx context.Context, db bun.IDB, nodeID uuid.UUID) (string, error) {
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var path []string
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err := db.NewRaw(absolutePathQuery, nodeID).Scan(ctx, &path)
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if err != nil {
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if errors.Is(err, sql.ErrNoRows) {
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return "", ErrNodeNotFound
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}
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return "", err
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}
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return JoinPath(path...), nil
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}
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func buildNodeAbsolutePath(ctx context.Context, db bun.IDB, node *Node, rootID uuid.UUID) (Path, error) {
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var segments []PathSegment
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err := db.NewRaw(absolutePathWithPublicIDQuery, node.ID, rootID, rootID).Scan(ctx, &segments)
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if err != nil {
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if errors.Is(err, sql.ErrNoRows) {
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return nil, ErrNodeNotFound
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}
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return nil, err
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}
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return segments, nil
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}
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