418 lines
7.7 KiB
Go
418 lines
7.7 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 db
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import (
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"sort"
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"context"
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"github.com/abcum/surreal/cnf"
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"github.com/abcum/surreal/sql"
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"github.com/abcum/surreal/util/conv"
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"github.com/abcum/surreal/util/data"
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"github.com/abcum/surreal/util/diff"
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)
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var main = map[string]struct{}{
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"id": {},
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"meta": {},
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"meta.tb": {},
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"meta.id": {},
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}
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func (d *document) merge(ctx context.Context, met method, data sql.Expr) (err error) {
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if err = d.defFld(ctx, met); err != nil {
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return
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}
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switch expr := data.(type) {
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case *sql.DataExpression:
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if err = d.mrgSet(ctx, met, expr); err != nil {
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return err
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}
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case *sql.DiffExpression:
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if err = d.mrgDpm(ctx, met, expr); err != nil {
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return err
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}
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case *sql.MergeExpression:
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if err = d.mrgAny(ctx, met, expr); err != nil {
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return err
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}
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case *sql.ContentExpression:
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if err = d.mrgAll(ctx, met, expr); err != nil {
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return err
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}
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}
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if err = d.defFld(ctx, met); err != nil {
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return
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}
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if err = d.mrgFld(ctx, met); err != nil {
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return
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}
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if err = d.defFld(ctx, met); err != nil {
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return
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}
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if err = d.delFld(ctx, met); 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 (d *document) defFld(ctx context.Context, met method) (err error) {
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d.current.Set(d.id, "id")
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d.current.Set(d.md, "meta")
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return
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}
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func (d *document) delFld(ctx context.Context, met method) (err error) {
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tb, err := d.getTB()
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if err != nil {
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return err
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}
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if tb.Full {
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var keys = map[string]struct{}{}
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// Get the defined fields
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fds, err := d.getFD()
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if err != nil {
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return err
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}
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// Loop over the allowed keys
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for _, fd := range fds {
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d.current.Walk(func(key string, val interface{}) (err error) {
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keys[key] = struct{}{}
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return
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}, fd.Name.ID)
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}
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// Delete any keys which aren't allowed
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d.current.Each(func(key string, val interface{}) (err error) {
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if _, ok := main[key]; !ok {
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if _, ok := keys[key]; !ok {
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d.current.Del(key)
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}
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}
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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 (d *document) mrgAll(ctx context.Context, met method, expr *sql.ContentExpression) (err error) {
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var obj map[string]interface{}
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switch v := expr.Data.(type) {
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case map[string]interface{}:
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obj = v
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case *sql.Param:
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p, err := d.i.e.fetch(ctx, v, d.current)
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if err != nil {
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return err
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}
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switch v := p.(type) {
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case map[string]interface{}:
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obj = v
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}
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}
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d.current.Reset()
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for k, v := range obj {
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d.current.Set(v, k)
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}
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return
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}
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func (d *document) mrgAny(ctx context.Context, met method, expr *sql.MergeExpression) (err error) {
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var obj map[string]interface{}
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switch v := expr.Data.(type) {
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case map[string]interface{}:
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obj = v
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case *sql.Param:
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p, err := d.i.e.fetch(ctx, v, d.current)
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if err != nil {
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return err
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}
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switch v := p.(type) {
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case map[string]interface{}:
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obj = v
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}
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}
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for k, v := range obj {
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d.current.Set(v, k)
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}
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return
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}
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func (d *document) mrgDpm(ctx context.Context, met method, expr *sql.DiffExpression) (err error) {
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var obj []interface{}
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var old map[string]interface{}
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var now map[string]interface{}
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switch v := expr.Data.(type) {
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case []interface{}:
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obj = v
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case *sql.Param:
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p, err := d.i.e.fetch(ctx, v, d.current)
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if err != nil {
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return err
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}
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switch v := p.(type) {
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case []interface{}:
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obj = v
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}
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}
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old = d.current.Data().(map[string]interface{})
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now = diff.Patch(old, obj)
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d.current = data.Consume(now)
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return
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}
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func (d *document) mrgSet(ctx context.Context, met method, expr *sql.DataExpression) (err error) {
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for _, v := range expr.Data {
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if i, ok := v.LHS.(*sql.Ident); ok {
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n, err := d.i.e.fetch(ctx, v.RHS, d.current)
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if err != nil {
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return err
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}
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switch v.Op {
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case sql.EQ:
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switch n.(type) {
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default:
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d.current.Set(n, i.ID)
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case *sql.Void:
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d.current.Del(i.ID)
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}
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case sql.INC:
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d.current.Inc(n, i.ID)
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case sql.DEC:
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d.current.Dec(n, i.ID)
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}
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}
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}
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return
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}
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func (d *document) mrgFld(ctx context.Context, met method) (err error) {
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fds, err := d.getFD()
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if err != nil {
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return err
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}
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// Sort the fields according to their
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// priority so that fields which depend
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// on another field can be processed
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// after that field in a specific order.
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sort.Slice(fds, func(i, j int) bool {
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return fds[i].Priority < fds[j].Priority
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})
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// Loop through each field and check to
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// see if it might be a specific type.
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// This is because when updating records
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// using json, there is no specific type
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// for a 'datetime' and 'record'.
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d.current.Each(func(key string, val interface{}) (err error) {
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if val, ok := conv.MightBe(val); ok {
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d.current.Iff(val, key)
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}
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return nil
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})
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// Loop over each of the defined fields
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// and process them fully, applying the
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// VALUE and ASSERT clauses sequentially.
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for _, fd := range fds {
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err = d.current.Walk(func(key string, val interface{}) error {
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vars := data.New()
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var old = d.initial.Get(key).Data()
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// Ensure the field is the correct type
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if val != nil {
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if now, err := conv.ConvertTo(fd.Type, fd.Kind, val); err != nil {
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val = nil
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} else {
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val = now
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}
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}
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// We are setting the value of the field
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if fd.Value != nil {
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// Reset the variables
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vars.Set(val, varKeyValue)
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vars.Set(val, varKeyAfter)
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vars.Set(old, varKeyBefore)
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ctx = context.WithValue(ctx, ctxKeySpec, vars)
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if now, err := d.i.e.fetch(ctx, fd.Value, d.current); err != nil {
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return err
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} else {
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val = now
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}
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}
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// We are checking the value of the field
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if fd.Assert != nil {
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// Reset the variables
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vars.Set(val, varKeyValue)
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vars.Set(val, varKeyAfter)
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vars.Set(old, varKeyBefore)
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ctx = context.WithValue(ctx, ctxKeySpec, vars)
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if chk, err := d.i.e.fetch(ctx, fd.Assert, d.current); err != nil {
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return err
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} else if chk, ok := chk.(bool); ok && !chk {
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return &FieldError{field: key, found: val, check: fd.Assert}
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}
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}
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// We are checking the permissions of the field
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if fd.Perms != nil {
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if k, ok := ctx.Value(ctxKeyKind).(cnf.Kind); ok {
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if k > cnf.AuthDB {
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// Reset the variables
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vars.Set(val, varKeyValue)
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vars.Set(val, varKeyAfter)
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vars.Set(old, varKeyBefore)
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ctx = context.WithValue(ctx, ctxKeySpec, vars)
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switch p := fd.Perms.(type) {
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case *sql.PermExpression:
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switch met {
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case _CREATE:
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if v, err := d.i.e.fetch(ctx, p.Create, d.current); err != nil {
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return err
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} else {
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if b, ok := v.(bool); !ok || !b {
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val = old
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}
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}
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case _UPDATE:
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if v, err := d.i.e.fetch(ctx, p.Update, d.current); err != nil {
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return err
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} else {
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if b, ok := v.(bool); !ok || !b {
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val = old
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}
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}
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case _DELETE:
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if v, err := d.i.e.fetch(ctx, p.Delete, d.current); err != nil {
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return err
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} else {
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if b, ok := v.(bool); !ok || !b {
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val = old
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}
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}
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}
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}
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}
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}
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}
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// We are setting the value of the field
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switch val.(type) {
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default:
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d.current.Iff(val, key)
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case *sql.Void:
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d.current.Del(key)
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}
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return nil
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}, fd.Name.ID)
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if 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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