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group.go
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group.go
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package sqlite
import (
"context"
"database/sql"
"fmt"
"strings"
"github.com/imagvfx/forge"
)
// see createAccessorTable for table creation.
// addEveryoneGroup adds 'everyone' group to accessors table.
// everyone group includes every user as the name says.
// One unique thing for everyone group is that it won't hold members.
// Membership checking for any user to everyone will return true.
// The group isn't allowed to be renamed or deleted.
func addEveryoneGroup(tx *sql.Tx) error {
_, err := tx.Exec(`
INSERT OR IGNORE INTO accessors
(is_group, name, called, disabled)
VALUES
(?, ?, ?, ?)
`,
true, "everyone", "Everyone", false,
)
if err != nil {
return err
}
return nil
}
// addAdminGroup adds 'admin' group to accessors table.
// admin group is created while initializing db, so it's the first created accessor.
// Members of admin group are able to see/modify any entry.
// The group isn't allowed to be renamed or deleted.
func addAdminGroup(tx *sql.Tx) error {
_, err := tx.Exec(`
INSERT OR IGNORE INTO accessors
(is_group, name, called, disabled)
VALUES
(?, ?, ?, ?)
`,
true, "admin", "Admin", false,
)
if err != nil {
return err
}
return nil
}
func FindGroups(db *sql.DB, ctx context.Context, find forge.GroupFinder) ([]*forge.Group, error) {
tx, err := db.BeginTx(ctx, nil)
if err != nil {
return nil, err
}
defer tx.Rollback()
groups, err := findGroups(tx, ctx, find)
if err != nil {
return nil, err
}
err = tx.Commit()
if err != nil {
return nil, err
}
return groups, nil
}
func findGroups(tx *sql.Tx, ctx context.Context, find forge.GroupFinder) ([]*forge.Group, error) {
keys := make([]string, 0)
vals := make([]any, 0)
keys = append(keys, "is_group=?")
vals = append(vals, true)
if find.Name != nil {
keys = append(keys, "name=?")
vals = append(vals, *find.Name)
}
if find.Called != nil {
keys = append(keys, "called=?")
vals = append(vals, *find.Called)
}
where := ""
if len(keys) != 0 {
where = "WHERE " + strings.Join(keys, " AND ")
}
rows, err := tx.QueryContext(ctx, `
SELECT
id,
name,
called
FROM accessors
`+where+`
ORDER BY id ASC
`,
vals...,
)
if err != nil {
return nil, err
}
defer rows.Close()
groups := make([]*forge.Group, 0)
for rows.Next() {
u := &forge.Group{}
err := rows.Scan(
&u.ID,
&u.Name,
&u.Called,
)
if err != nil {
return nil, err
}
groups = append(groups, u)
}
return groups, nil
}
func GetGroup(db *sql.DB, ctx context.Context, name string) (*forge.Group, error) {
tx, err := db.BeginTx(ctx, nil)
if err != nil {
return nil, err
}
defer tx.Rollback()
u, err := getGroup(tx, ctx, name)
if err != nil {
return nil, err
}
err = tx.Commit()
if err != nil {
return nil, err
}
return u, nil
}
func getGroup(tx *sql.Tx, ctx context.Context, name string) (*forge.Group, error) {
groups, err := findGroups(tx, ctx, forge.GroupFinder{Name: &name})
if err != nil {
return nil, err
}
if len(groups) == 0 {
return nil, forge.NotFound("group not found: %v", name)
}
return groups[0], nil
}
func AddGroup(db *sql.DB, ctx context.Context, g *forge.Group) error {
tx, err := db.BeginTx(ctx, nil)
if err != nil {
return err
}
defer tx.Rollback()
user := forge.UserNameFromContext(ctx)
if user == "" {
return forge.Unauthorized("context user unspecified")
}
yes, err := isAdmin(tx, ctx, user)
if err != nil {
return err
}
if !yes {
return forge.Unauthorized("user doesn't have permission to add group: %v", user)
}
if strings.Split(g.Name, "@")[0] == "everyone" {
return fmt.Errorf("'everyone[@host]' group will be created automatically and cannot be created by a user")
}
err = addGroup(tx, ctx, g)
if err != nil {
return err
}
err = tx.Commit()
if err != nil {
return err
}
return nil
}
func addGroup(tx *sql.Tx, ctx context.Context, g *forge.Group) error {
result, err := tx.ExecContext(ctx, `
INSERT INTO accessors (
is_group,
name,
called,
disabled
)
VALUES (?, ?, ?, ?)
`,
true,
g.Name,
g.Called,
false,
)
if err != nil {
return err
}
id, err := result.LastInsertId()
if err != nil {
return err
}
g.ID = int(id)
return nil
}
func UpdateGroup(db *sql.DB, ctx context.Context, upd forge.GroupUpdater) error {
tx, err := db.BeginTx(ctx, nil)
if err != nil {
return err
}
defer tx.Rollback()
user := forge.UserNameFromContext(ctx)
if user == "" {
return forge.Unauthorized("context user unspecified")
}
yes, err := isAdmin(tx, ctx, user)
if err != nil {
return err
}
if !yes {
return forge.Unauthorized("user doesn't have permission to update group: %v", user)
}
err = updateGroup(tx, ctx, upd)
if err != nil {
return err
}
err = tx.Commit()
if err != nil {
return err
}
return nil
}
func updateGroup(tx *sql.Tx, ctx context.Context, upd forge.GroupUpdater) error {
g, err := getGroup(tx, ctx, upd.Name)
if err != nil {
return err
}
keys := make([]string, 0)
vals := make([]any, 0)
if upd.NewName != nil {
if upd.Name == "admin" || strings.Split(upd.Name, "@")[0] == "everyone" {
return fmt.Errorf("rename 'admin' or 'everyone[@host]' group is not supported: %v", upd.Name)
}
if g.Name != *upd.NewName {
keys = append(keys, "name=?")
vals = append(vals, *upd.NewName)
}
}
if upd.Called != nil {
if g.Called != *upd.Called {
keys = append(keys, "called=?")
vals = append(vals, *upd.Called)
}
}
if len(keys) == 0 {
return nil
}
vals = append(vals, upd.Name) // for where clause
result, err := tx.ExecContext(ctx, `
UPDATE accessors
SET `+strings.Join(keys, ", ")+`
WHERE is_group=1 AND name=?
`,
vals...,
)
if err != nil {
return err
}
n, err := result.RowsAffected()
if err != nil {
return err
}
if n != 1 {
return fmt.Errorf("want 1 property affected, got %v", n)
}
return nil
}