pronounsfu/backend/db/field.go

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package db
import (
"context"
"fmt"
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"emperror.dev/errors"
"github.com/georgysavva/scany/pgxscan"
"github.com/jackc/pgx/v4"
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"github.com/rs/xid"
)
const (
MaxFields = 25
FieldNameMaxLength = 100
FieldEntriesLimit = 100
FieldEntryMaxLength = 100
)
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type Field struct {
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ID int64 `json:"-"`
Name string `json:"name"`
Entries []FieldEntry `json:"entries"`
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}
// Validate validates this field. If it is invalid, a non-empty string is returned as error message.
func (f Field) Validate() string {
if f.Name == "" {
return "name cannot be empty"
}
if length := len([]rune(f.Name)); length > FieldNameMaxLength {
return fmt.Sprintf("name max length is %d characters, length is %d", FieldNameMaxLength, length)
}
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if length := len(f.Entries); length > FieldEntriesLimit {
return fmt.Sprintf("max number of entries is %d, current number is %d", FieldEntriesLimit, length)
}
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for i, entry := range f.Entries {
if length := len([]rune(entry.Value)); length > FieldEntryMaxLength {
return fmt.Sprintf("entries.%d: max length is %d characters, length is %d", i, FieldEntryMaxLength, length)
}
if !entry.Status.Valid() {
return fmt.Sprintf("entries.%d: status is invalid", i)
}
}
return ""
}
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// UserFields returns the fields associated with the given user ID.
func (db *DB) UserFields(ctx context.Context, id xid.ID) (fs []Field, err error) {
sql, args, err := sq.Select("id", "name", "entries").From("user_fields").Where("user_id = ?", id).OrderBy("id").ToSql()
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if err != nil {
return fs, errors.Wrap(err, "building sql")
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}
err = pgxscan.Select(ctx, db, &fs, sql, args...)
if err != nil {
return fs, errors.Wrap(err, "executing query")
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}
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return fs, nil
}
// SetUserFields updates the fields for the given user.
func (db *DB) SetUserFields(ctx context.Context, tx pgx.Tx, userID xid.ID, fields []Field) (err error) {
sql, args, err := sq.Delete("user_fields").Where("user_id = ?", userID).ToSql()
if err != nil {
return errors.Wrap(err, "building sql")
}
_, err = tx.Exec(ctx, sql, args...)
if err != nil {
return errors.Wrap(err, "deleting existing fields")
}
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for _, field := range fields {
_, err := tx.Exec(ctx, "INSERT INTO user_fields (user_id, name, entries) VALUES ($1, $2, $3)", userID, field.Name, field.Entries)
if err != nil {
return errors.Wrap(err, "inserting new fields")
}
}
return nil
}
// MemberFields returns the fields associated with the given member ID.
func (db *DB) MemberFields(ctx context.Context, id xid.ID) (fs []Field, err error) {
sql, args, err := sq.Select("id", "name", "entries").From("member_fields").Where("member_id = ?", id).OrderBy("id").ToSql()
if err != nil {
return fs, errors.Wrap(err, "building sql")
}
err = pgxscan.Select(ctx, db, &fs, sql, args...)
if err != nil {
return fs, errors.Wrap(err, "executing query")
}
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return fs, nil
}
// SetMemberFields updates the fields for the given member.
func (db *DB) SetMemberFields(ctx context.Context, tx pgx.Tx, memberID xid.ID, fields []Field) (err error) {
sql, args, err := sq.Delete("member_fields").Where("member_id = ?", memberID).ToSql()
if err != nil {
return errors.Wrap(err, "building sql")
}
_, err = tx.Exec(ctx, sql, args...)
if err != nil {
return errors.Wrap(err, "deleting existing fields")
}
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for _, field := range fields {
_, err := tx.Exec(ctx, "INSERT INTO member_fields (member_id, name, entries) VALUES ($1, $2, $3)", memberID, field.Name, field.Entries)
if err != nil {
return errors.Wrap(err, "inserting new fields")
}
}
return nil
}