yq/pkg/yqlib/operator_multiply.go

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package yqlib
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import (
"fmt"
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"strconv"
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"container/list"
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"github.com/jinzhu/copier"
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yaml "gopkg.in/yaml.v3"
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)
type multiplyPreferences struct {
AppendArrays bool
DeepMergeArrays bool
TraversePrefs traversePreferences
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}
func multiplyOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
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log.Debugf("-- MultiplyOperator")
return crossFunction(d, context, expressionNode, multiply(expressionNode.Operation.Preferences.(multiplyPreferences)), false)
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}
func getNewBlankNode(lhs *yaml.Node, rhs *yaml.Node) *yaml.Node {
blankNode := &yaml.Node{}
if lhs.HeadComment != "" {
blankNode.HeadComment = lhs.HeadComment
} else if rhs.HeadComment != "" {
blankNode.HeadComment = rhs.HeadComment
}
if lhs.FootComment != "" {
blankNode.FootComment = lhs.FootComment
} else if rhs.FootComment != "" {
blankNode.FootComment = rhs.FootComment
}
return blankNode
}
func multiply(preferences multiplyPreferences) func(d *dataTreeNavigator, context Context, lhs *CandidateNode, rhs *CandidateNode) (*CandidateNode, error) {
return func(d *dataTreeNavigator, context Context, lhs *CandidateNode, rhs *CandidateNode) (*CandidateNode, error) {
// need to do this before unWrapping the potential document node
newBlankNode := getNewBlankNode(lhs.Node, rhs.Node)
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lhs.Node = unwrapDoc(lhs.Node)
rhs.Node = unwrapDoc(rhs.Node)
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log.Debugf("Multipling LHS: %v", lhs.Node.Tag)
log.Debugf("- RHS: %v", rhs.Node.Tag)
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if lhs.Node.Kind == yaml.MappingNode && rhs.Node.Kind == yaml.MappingNode ||
(lhs.Node.Kind == yaml.SequenceNode && rhs.Node.Kind == yaml.SequenceNode) {
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var newBlank = CandidateNode{}
err := copier.CopyWithOption(&newBlank, lhs, copier.Option{IgnoreEmpty: true, DeepCopy: true})
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if err != nil {
return nil, err
}
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newBlank.Node.HeadComment = newBlankNode.HeadComment
newBlank.Node.FootComment = newBlankNode.FootComment
// var newBlank = lhs.CreateChild(nil, newBlankNode)
// log.Debugf("merge - merge lhs into blank")
// var newThing, err = mergeObjects(d, context.WritableClone(), newBlank, lhs, multiplyPreferences{})
// if err != nil {
// return nil, err
// }
return mergeObjects(d, context.WritableClone(), &newBlank, rhs, preferences)
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} else if lhs.Node.Tag == "!!int" && rhs.Node.Tag == "!!int" {
return multiplyIntegers(lhs, rhs)
} else if (lhs.Node.Tag == "!!int" || lhs.Node.Tag == "!!float") && (rhs.Node.Tag == "!!int" || rhs.Node.Tag == "!!float") {
return multiplyFloats(lhs, rhs)
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}
return nil, fmt.Errorf("Cannot multiply %v with %v", lhs.Node.Tag, rhs.Node.Tag)
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}
}
func multiplyFloats(lhs *CandidateNode, rhs *CandidateNode) (*CandidateNode, error) {
target := lhs.CreateChild(nil, &yaml.Node{})
target.Node.Kind = yaml.ScalarNode
target.Node.Style = lhs.Node.Style
target.Node.Tag = "!!float"
lhsNum, err := strconv.ParseFloat(lhs.Node.Value, 64)
if err != nil {
return nil, err
}
rhsNum, err := strconv.ParseFloat(rhs.Node.Value, 64)
if err != nil {
return nil, err
}
target.Node.Value = fmt.Sprintf("%v", lhsNum*rhsNum)
return target, nil
}
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func multiplyIntegers(lhs *CandidateNode, rhs *CandidateNode) (*CandidateNode, error) {
target := lhs.CreateChild(nil, &yaml.Node{})
target.Node.Kind = yaml.ScalarNode
target.Node.Style = lhs.Node.Style
target.Node.Tag = "!!int"
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format, lhsNum, err := parseInt(lhs.Node.Value)
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if err != nil {
return nil, err
}
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_, rhsNum, err := parseInt(rhs.Node.Value)
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if err != nil {
return nil, err
}
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target.Node.Value = fmt.Sprintf(format, lhsNum*rhsNum)
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return target, nil
}
func mergeObjects(d *dataTreeNavigator, context Context, lhs *CandidateNode, rhs *CandidateNode, preferences multiplyPreferences) (*CandidateNode, error) {
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var results = list.New()
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// only need to recurse the array if we are doing a deep merge
prefs := recursiveDescentPreferences{RecurseArray: preferences.DeepMergeArrays,
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TraversePreferences: traversePreferences{DontFollowAlias: true, IncludeMapKeys: true}}
log.Debugf("merge - preferences.DeepMergeArrays %v", preferences.DeepMergeArrays)
log.Debugf("merge - preferences.AppendArrays %v", preferences.AppendArrays)
err := recursiveDecent(d, results, context.SingleChildContext(rhs), prefs)
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if err != nil {
return nil, err
}
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var pathIndexToStartFrom int = 0
if results.Front() != nil {
pathIndexToStartFrom = len(results.Front().Value.(*CandidateNode).Path)
}
for el := results.Front(); el != nil; el = el.Next() {
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candidate := el.Value.(*CandidateNode)
if candidate.Node.Tag == "!!merge" {
continue
}
err := applyAssignment(d, context, pathIndexToStartFrom, lhs, candidate, preferences)
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if err != nil {
return nil, err
}
}
return lhs, nil
}
func applyAssignment(d *dataTreeNavigator, context Context, pathIndexToStartFrom int, lhs *CandidateNode, rhs *CandidateNode, preferences multiplyPreferences) error {
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shouldAppendArrays := preferences.AppendArrays
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log.Debugf("merge - applyAssignment lhs %v, rhs: %v", lhs.GetKey(), rhs.GetKey())
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lhsPath := rhs.Path[pathIndexToStartFrom:]
log.Debugf("merge - lhsPath %v", lhsPath)
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assignmentOp := &Operation{OperationType: assignAttributesOpType}
if shouldAppendArrays && rhs.Node.Kind == yaml.SequenceNode {
assignmentOp.OperationType = addAssignOpType
log.Debugf("merge - assignmentOp.OperationType = addAssignOpType")
} else if !preferences.DeepMergeArrays && rhs.Node.Kind == yaml.SequenceNode ||
(rhs.Node.Kind == yaml.ScalarNode || rhs.Node.Kind == yaml.AliasNode) {
assignmentOp.OperationType = assignOpType
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assignmentOp.UpdateAssign = false
log.Debugf("merge - rhs.Node.Kind == yaml.SequenceNode: %v", rhs.Node.Kind == yaml.SequenceNode)
log.Debugf("merge - rhs.Node.Kind == yaml.ScalarNode: %v", rhs.Node.Kind == yaml.ScalarNode)
log.Debugf("merge - rhs.Node.Kind == yaml.AliasNode: %v", rhs.Node.Kind == yaml.AliasNode)
log.Debugf("merge - assignmentOp.OperationType = assignOpType, no updateassign")
} else {
log.Debugf("merge - assignmentOp := &Operation{OperationType: assignAttributesOpType}")
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}
rhsOp := &Operation{OperationType: valueOpType, CandidateNode: rhs}
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assignmentOpNode := &ExpressionNode{Operation: assignmentOp, Lhs: createTraversalTree(lhsPath, preferences.TraversePrefs, rhs.IsMapKey), Rhs: &ExpressionNode{Operation: rhsOp}}
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_, err := d.GetMatchingNodes(context.SingleChildContext(lhs), assignmentOpNode)
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return err
}