208 lines
3.7 KiB
Go
208 lines
3.7 KiB
Go
// Copyright © 2016 Abcum Ltd
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package item
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import (
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"time"
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"github.com/imdario/mergo"
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"github.com/abcum/surreal/sql"
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"github.com/abcum/surreal/util/data"
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)
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func (this *Doc) Merge(data []sql.Expr) (err error) {
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this.getFields()
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this.getIndexs()
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if err = this.setFld(); err != nil {
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return
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}
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if err = this.defFld(); err != nil {
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return
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}
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if err = this.setFld(); err != nil {
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return
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}
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for _, part := range data {
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switch expr := part.(type) {
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case *sql.DiffExpression:
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this.mrgDpm(expr)
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case *sql.DataExpression:
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this.mrgOne(expr)
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case *sql.MergeExpression:
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this.mrgAny(expr)
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case *sql.ContentExpression:
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this.mrgAll(expr)
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}
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}
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if err = this.setFld(); err != nil {
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return
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}
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if err = this.mrgFld(); err != nil {
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return
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}
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if err = this.setFld(); err != nil {
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return
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}
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return
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}
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func (this *Doc) setFld() (err error) {
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this.current.Set(this.id, "id")
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this.current.Set(this.key.ID, "meta.id")
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this.current.Set(this.key.TB, "meta.tb")
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return
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}
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func (this *Doc) defFld() (err error) {
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for _, fld := range this.fields {
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this.current.Walk(func(key string, val interface{}) error {
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v := this.current.Valid(key)
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e := this.current.Exists(key)
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if fld.Default != nil && (!e || !v && fld.Notnull) {
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switch val := fld.Default.(type) {
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case sql.Void, *sql.Void:
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this.current.Del(key)
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case sql.Null, *sql.Null:
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this.current.Set(nil, key)
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default:
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this.current.Set(fld.Default, key)
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case sql.Ident:
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this.current.Set(this.current.Get(val.ID).Data(), key)
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case *sql.Ident:
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this.current.Set(this.current.Get(val.ID).Data(), key)
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}
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}
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return nil
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}, fld.Name)
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}
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return
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}
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func (this *Doc) mrgFld() (err error) {
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for _, fld := range this.fields {
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if err = this.each(fld); err != nil {
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return
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}
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}
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return
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}
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func (this *Doc) mrgAll(expr *sql.ContentExpression) {
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this.current = data.Consume(expr.JSON)
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}
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func (this *Doc) mrgAny(expr *sql.MergeExpression) {
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lhs, _ := this.current.Data().(map[string]interface{})
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rhs, _ := expr.JSON.(map[string]interface{})
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err := mergo.MapWithOverwrite(&lhs, rhs)
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if err != nil {
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return
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}
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this.current = data.Consume(lhs)
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}
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func (this *Doc) mrgDpm(expr *sql.DiffExpression) {
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}
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func (this *Doc) mrgOne(expr *sql.DataExpression) {
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lhs := this.getMrgItemLHS(expr.LHS)
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rhs := this.getMrgItemRHS(expr.RHS)
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if expr.Op == sql.EQ {
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switch expr.RHS.(type) {
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default:
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this.current.Set(rhs, lhs)
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case *sql.Void:
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this.current.Del(lhs)
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}
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}
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if expr.Op == sql.INC {
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this.current.Inc(rhs, lhs)
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}
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if expr.Op == sql.DEC {
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this.current.Dec(rhs, lhs)
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}
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}
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func (this *Doc) getMrgItemLHS(expr sql.Expr) string {
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switch val := expr.(type) {
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default:
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return ""
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case sql.Ident:
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return val.ID
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case *sql.Ident:
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return val.ID
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}
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}
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func (this *Doc) getMrgItemRHS(expr sql.Expr) interface{} {
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switch val := expr.(type) {
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default:
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return nil
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case time.Time:
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return val
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case bool, int64, float64, string:
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return val
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case []interface{}, map[string]interface{}:
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return val
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case *sql.Thing:
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return val
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case *sql.Param:
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return this.runtime.Get(val.ID).Data()
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case *sql.Ident:
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return this.current.Get(val.ID).Data()
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}
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}
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