18F/culper

package api

import (
    "github.com/pkg/errors"
)

// DatabaseErrorNotFound is an error that indicates that the function failed because
// the seach returned zero results. It is expected to be returned by Select et al.
type DatabaseErrorNotFound string

func (d DatabaseErrorNotFound) Error() string {
    return string(d)
}

// IsDatabaseErrorNotFound returns true if the error is a DatabaseErrorNotFound error
func IsDatabaseErrorNotFound(err error) bool {
    if _, ok := errors.Cause(err).(DatabaseErrorNotFound); ok {
        return true
    }
    return false
}

// DatabaseService represents a persisted data storage.
type DatabaseService interface {
    Raw(query interface{}, params ...interface{}) error
    Find(query interface{}, callback func(query interface{}))
    FindAll(model interface{}) error
    Where(model interface{}, condition string, params ...interface{}) error
    ColumnsWhere(model interface{}, columns []string, condition string, params ...interface{}) error
    Insert(query ...interface{}) error
    Update(query interface{}) error
    Save(query ...interface{}) error
    Delete(query interface{}) error
    Select(query interface{}) error
    Count(model interface{}, condition string, params ...interface{}) int
    CountExpr(model interface{}, expr string, retval interface{}, condition string, params ...interface{})
    Array(model interface{}, expr string, retval interface{}, condition string, params ...interface{})
    Close() error
}