101 lines
2.0 KiB
Go
101 lines
2.0 KiB
Go
package db
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import (
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"database/sql"
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"errors"
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)
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// GetAllGroups retrieves all groups from the database
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func GetAllGroups() ([]Group, error) {
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var groups []Group
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query := `SELECT "GroupID", "GroupName" FROM "Groups" ORDER BY "GroupID"`
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rows, err := DB.Query(query)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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for rows.Next() {
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var group Group
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err := rows.Scan(&group.GroupID, &group.GroupName)
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if err != nil {
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return nil, err
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}
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groups = append(groups, group)
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}
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return groups, nil
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}
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// GetGroupByID retrieves a single group by ID
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func GetGroupByID(groupID int) (*Group, error) {
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var group Group
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query := `SELECT "GroupID", "GroupName" FROM "Groups" WHERE "GroupID" = $1`
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err := DB.QueryRow(query, groupID).Scan(&group.GroupID, &group.GroupName)
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if err != nil {
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if err == sql.ErrNoRows {
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return nil, errors.New("group not found")
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}
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return nil, err
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}
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return &group, nil
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}
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// CreateGroup creates a new group in the database
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func CreateGroup(groupName string) (*Group, error) {
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var group Group
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query := `INSERT INTO "Groups" ("GroupName") VALUES ($1) RETURNING "GroupID", "GroupName"`
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err := DB.QueryRow(query, groupName).Scan(&group.GroupID, &group.GroupName)
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if err != nil {
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return nil, err
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}
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return &group, nil
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}
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// UpdateGroup updates an existing group
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func UpdateGroup(groupID int, groupName string) error {
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query := `UPDATE "Groups" SET "GroupName" = $1 WHERE "GroupID" = $2`
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result, err := DB.Exec(query, groupName, groupID)
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if err != nil {
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return err
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}
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rowsAffected, err := result.RowsAffected()
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if err != nil {
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return err
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}
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if rowsAffected == 0 {
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return errors.New("group not found")
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}
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return nil
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}
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// DeleteGroup deletes a group from the database
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func DeleteGroup(groupID int) error {
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query := `DELETE FROM "Groups" WHERE "GroupID" = $1`
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result, err := DB.Exec(query, groupID)
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if err != nil {
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return err
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}
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rowsAffected, err := result.RowsAffected()
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if err != nil {
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return err
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}
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if rowsAffected == 0 {
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return errors.New("group not found")
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}
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return nil
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}
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