wehub-resource-sync
157 lines
3.6 KiB
Go
157 lines
3.6 KiB
Go
// Copyright 2021 Dolthub, Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package schema
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
)
|
|
|
|
type Check interface {
|
|
Name() string
|
|
Expression() string
|
|
Enforced() bool
|
|
IsNotValid() bool
|
|
}
|
|
|
|
// CheckCollection is the set of `check` constraints on a table's schema
|
|
type CheckCollection interface {
|
|
// AddCheck adds a check to this collection and returns it
|
|
AddCheck(name, expression string, enforce, isNotValid bool) (Check, error)
|
|
// DropCheck removes the check with the name given
|
|
DropCheck(name string) error
|
|
// AllChecks returns all the checks in the collection
|
|
AllChecks() []Check
|
|
// Equals returns whether the provided check collection is equal or not.
|
|
Equals(other CheckCollection) bool
|
|
// Count returns the size of the collection
|
|
Count() int
|
|
// Copy returns a copy of the collection safe to modify without affecting the original
|
|
Copy() CheckCollection
|
|
}
|
|
|
|
type check struct {
|
|
name string
|
|
expression string
|
|
enforced bool
|
|
isNotValid bool
|
|
}
|
|
|
|
func (c check) Name() string {
|
|
return c.name
|
|
}
|
|
|
|
func (c check) Expression() string {
|
|
return c.expression
|
|
}
|
|
|
|
func (c check) Enforced() bool {
|
|
return c.enforced
|
|
}
|
|
|
|
func (c check) IsNotValid() bool {
|
|
return c.isNotValid
|
|
}
|
|
|
|
type checkCollection struct {
|
|
checks []check
|
|
}
|
|
|
|
func (c *checkCollection) AddCheck(name, expression string, enforce, isNotValid bool) (Check, error) {
|
|
for _, chk := range c.checks {
|
|
if strings.EqualFold(name, chk.name) {
|
|
// Engine is supposed to enforce this for us, but just in case
|
|
return nil, fmt.Errorf("name %s in use", name)
|
|
}
|
|
}
|
|
|
|
newCheck := check{
|
|
name: name,
|
|
expression: expression,
|
|
enforced: enforce,
|
|
isNotValid: isNotValid,
|
|
}
|
|
c.checks = append(c.checks, newCheck)
|
|
|
|
return newCheck, nil
|
|
}
|
|
|
|
func (c *checkCollection) DropCheck(name string) error {
|
|
for i, chk := range c.checks {
|
|
if strings.EqualFold(name, chk.name) {
|
|
c.checks = append(c.checks[:i], c.checks[i+1:]...)
|
|
return nil
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (c *checkCollection) AllChecks() []Check {
|
|
checks := make([]Check, len(c.checks))
|
|
for i, check := range c.checks {
|
|
checks[i] = check
|
|
}
|
|
return checks
|
|
}
|
|
|
|
func (c *checkCollection) Equals(other CheckCollection) bool {
|
|
|
|
o := other.(*checkCollection)
|
|
if len(c.checks) != len(o.checks) {
|
|
return false
|
|
}
|
|
|
|
for i := range c.checks {
|
|
a := c.checks[i]
|
|
b := o.checks[i]
|
|
if a.name != b.name ||
|
|
a.expression != b.expression ||
|
|
a.enforced != b.enforced ||
|
|
a.isNotValid != b.isNotValid {
|
|
return false
|
|
}
|
|
}
|
|
|
|
return true
|
|
}
|
|
|
|
func (c *checkCollection) Count() int {
|
|
return len(c.checks)
|
|
}
|
|
|
|
func NewCheckCollection() CheckCollection {
|
|
return &checkCollection{
|
|
checks: make([]check, 0),
|
|
}
|
|
}
|
|
|
|
func NewCheck(name, expression string, enforced bool, isNotValid bool) check {
|
|
return check{
|
|
name: name,
|
|
expression: expression,
|
|
enforced: enforced,
|
|
isNotValid: isNotValid,
|
|
}
|
|
}
|
|
|
|
func (c *checkCollection) Copy() CheckCollection {
|
|
newC := *c
|
|
newC.checks = make([]check, len(c.checks))
|
|
for i, check := range c.checks {
|
|
newC.checks[i] = NewCheck(check.name, check.expression, check.enforced, check.isNotValid)
|
|
}
|
|
return &newC
|
|
}
|