240 lines
9.7 KiB
Go
240 lines
9.7 KiB
Go
package engine
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import (
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"slices"
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"gitea.maximumdirect.net/eric/ConfigKit/internal/document"
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)
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type inheritanceTemplate struct {
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name string
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entry document.Entry
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path Path
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collectionPolicies collectionPolicyScope
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parent int
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hasParent bool
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hasDirective bool
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cancelled bool
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directive document.Entry
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}
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type inheritanceGraph struct {
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scope *document.Node
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scopePath Path
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collectionPolicies collectionPolicyScope
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applicationPolicy sequencePolicy
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nodes []inheritanceTemplate
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edges []dependencyEdge
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byName map[string]int
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}
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// analyzeInheritanceGraph retains only direct mapping siblings as graph nodes.
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// It validates declarations separately from applying their templates, leaving
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// nested scopes for the existing destination-local walk.
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func analyzeInheritanceGraph(scope *document.Node, scopePath Path) (*inheritanceGraph, []Diagnostic) {
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return analyzeInheritanceGraphWithPolicies(scope, scopePath, collectionPolicyScope{})
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}
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func analyzeInheritanceGraphWithPolicies(scope *document.Node, scopePath Path, policies collectionPolicyScope) (*inheritanceGraph, []Diagnostic) {
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return analyzeInheritanceGraphWithCollectionRules(scope, scopePath, policies, sequencePolicy{})
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}
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func analyzeInheritanceGraphWithCollectionRules(scope *document.Node, scopePath Path, policies collectionPolicyScope, applicationPolicy sequencePolicy) (*inheritanceGraph, []Diagnostic) {
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if scope == nil || scope.Kind != document.Mapping {
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return nil, []Diagnostic{{
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Code: CodeInheritanceInvalid, Severity: SeverityError, Path: scopePath,
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Message: "inheritance scope must be a mapping",
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}}
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}
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policyIndex := newInheritancePolicyIndex(policies)
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graph := &inheritanceGraph{
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scope: scope, scopePath: scopePath,
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collectionPolicies: policyIndex.absoluteScope(scopePath), applicationPolicy: applicationPolicy,
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byName: make(map[string]int, len(scope.Mapping)),
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}
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entries := make(map[string]document.Entry, len(scope.Mapping))
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for _, entry := range scope.Mapping {
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entries[entry.Key] = entry
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}
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names := make([]string, 0, len(scope.Mapping))
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for name, entry := range entries {
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if entry.Value.Kind == document.Mapping {
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names = append(names, name)
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}
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}
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slices.Sort(names)
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for _, name := range names {
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index := len(graph.nodes)
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graph.byName[name] = index
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graph.nodes = append(graph.nodes, inheritanceTemplate{
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name: name, entry: entries[name], path: scopePath.Key(name),
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collectionPolicies: policyIndex.localize(scopePath.Key(name)),
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})
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}
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for _, name := range names {
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index := graph.byName[name]
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node := &graph.nodes[index]
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reference, found := inheritanceDirective(node.entry.Value)
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if !found {
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continue
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}
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node.hasDirective = true
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node.directive = reference
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referencePath := node.path.Key(inheritanceKey)
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location := publicLocation(reference.Value.Location)
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switch reference.Value.Kind {
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case document.Null:
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node.cancelled = true
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case document.String:
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parent, exists := entries[reference.Value.Text]
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if !exists {
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return nil, []Diagnostic{inheritanceDiagnostic(CodeInheritanceMissing, referencePath, location, nil,
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"referenced sibling does not exist")}
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}
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if parent.Value.Kind != document.Mapping {
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related := []Location{publicLocation(parent.Value.Location)}
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return nil, []Diagnostic{inheritanceDiagnostic(CodeInheritanceInvalid, referencePath, location, related,
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"referenced sibling is not a mapping")}
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}
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node.parent = graph.byName[reference.Value.Text]
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node.hasParent = true
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graph.edges = append(graph.edges, dependencyEdge{prerequisite: node.parent, dependent: index})
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default:
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return nil, []Diagnostic{inheritanceDiagnostic(CodeInheritanceInvalid, referencePath, location, nil,
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"inheritance reference must be a sibling name or null")}
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}
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}
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return graph, nil
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}
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func (graph *inheritanceGraph) schedule() ([]int, []Diagnostic) {
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keys := make([]dependencyKey, len(graph.nodes))
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for i, node := range graph.nodes {
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keys[i] = dependencyKey{"definition", graph.scopePath.String(), node.path.String()}
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}
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order, cycle := scheduleDependencies(keys, graph.edges)
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if len(cycle) == 0 {
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return order, nil
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}
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parent := graph.nodes[cycle[0]]
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child := graph.nodes[cycle[1]]
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referencePath := child.path.Key(inheritanceKey)
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location := publicLocation(child.directive.Value.Location)
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return nil, []Diagnostic{inheritanceDiagnostic(CodeInheritanceCycle, referencePath, location,
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[]Location{publicLocation(parent.entry.Value.Location)}, "sibling inheritance contains a cycle")}
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}
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func expandSiblingDefinitionsWithOrigins(scope *document.Node, scopePath Path, limits projectionLimits, inputOrigins map[string]Origin, budget ...*retainedNodeCounter) (*inheritanceScope, []Diagnostic) {
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return expandSiblingDefinitionsWithPolicies(scope, scopePath, limits, inputOrigins, collectionPolicyScope{}, budget...)
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}
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func expandSiblingDefinitionsWithPolicies(scope *document.Node, scopePath Path, limits projectionLimits, inputOrigins map[string]Origin, policies collectionPolicyScope, budget ...*retainedNodeCounter) (*inheritanceScope, []Diagnostic) {
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return expandSiblingDefinitionsWithCollectionRules(scope, scopePath, limits, inputOrigins, policies, sequencePolicy{}, budget...)
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}
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func expandSiblingDefinitionsWithCollectionRules(scope *document.Node, scopePath Path, limits projectionLimits, inputOrigins map[string]Origin, policies collectionPolicyScope, applicationPolicy sequencePolicy, budget ...*retainedNodeCounter) (*inheritanceScope, []Diagnostic) {
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graph, diagnostics := analyzeInheritanceGraphWithCollectionRules(scope, scopePath, policies, applicationPolicy)
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if len(diagnostics) != 0 {
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return nil, diagnostics
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}
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order, diagnostics := graph.schedule()
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if len(diagnostics) != 0 {
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return nil, diagnostics
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}
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result, diagnostics := applyInheritanceTemplates(graph, order, limits, inputOrigins, budget...)
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if len(diagnostics) != 0 {
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return nil, diagnostics
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}
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return result, nil
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}
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// applyInheritanceTemplates builds detached templates in the supplied
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// dependency-ready order while retaining the existing origins, merge history,
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// and node-accounting evidence. The root keeps its authored mapping order.
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func applyInheritanceTemplates(graph *inheritanceGraph, order []int, limits projectionLimits, inputOrigins map[string]Origin, budget ...*retainedNodeCounter) (*inheritanceScope, []Diagnostic) {
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return applyInheritanceScopeTemplates(mappingInheritanceScope{graph: graph}, order, limits, inputOrigins, budget...)
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}
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func applyInheritanceScopeTemplates(adapter inheritanceScopeAdapter, order []int, limits projectionLimits, inputOrigins map[string]Origin, budget ...*retainedNodeCounter) (*inheritanceScope, []Diagnostic) {
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templates := adapter.templates()
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resolved := make([]*document.Node, len(templates))
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resolvedOrigins := make([]map[string]Origin, len(templates))
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resolvedPolicyTemplates := make([][]collectionPolicyScope, len(templates))
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resolvedPolicies := make([]collectionPolicyScope, len(templates))
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result := &inheritanceScope{}
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counter := newRetainedNodeCounter(historyNodeLimit)
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if len(budget) != 0 {
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counter = budget[0]
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}
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retained := 1 // scope container node
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for _, slot := range adapter.slots() {
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if slot.hasTemplate || slot.value.Kind == document.Mapping {
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continue
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}
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remaining := limits.nodes - retained - 1
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if limits.nodes >= 0 && remaining < 0 {
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return nil, []Diagnostic{inheritanceBudgetDiagnostic(slot.path, slot.value.Location)}
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}
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count, within := inheritanceLowerBoundCount(slot.value, remaining)
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if !within {
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return nil, []Diagnostic{inheritanceBudgetDiagnostic(slot.path, slot.value.Location)}
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}
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retained += 1 + count
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}
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for _, index := range order {
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node := templates[index]
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child := prepareInheritanceChild(node, inputOrigins)
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if limits.nodes >= 0 {
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remaining := limits.nodes - retained - adapter.slotOverhead()
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within := inheritanceLowerBoundWithin(child.payload, remaining)
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if node.hasParent {
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within = inheritanceOverlayLowerBoundWithin(resolved[node.parent], child.payload, remaining)
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}
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if !within {
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return nil, []Diagnostic{inheritanceBudgetDiagnostic(node.path, node.entry.Value.Location)}
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}
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}
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var parent *preparedInheritanceParent
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var parentOrigins map[string]Origin
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if node.hasParent {
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prepared := prepareInheritanceParent(
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node, templates[node.parent].path, resolved[node.parent], resolvedPolicyTemplates[node.parent],
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resolvedPolicies[node.parent], child, adapter.applicationPolicy(),
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)
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parent = &prepared
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parentOrigins = resolvedOrigins[node.parent]
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}
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templateResult, diagnostics := combineInheritanceTemplate(
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node, child, parent, parentOrigins, adapter.applicationPolicy(),
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)
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if len(diagnostics) != 0 {
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return nil, diagnostics
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}
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resolved[index] = templateResult.value
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resolvedOrigins[index] = templateResult.origins
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resolvedPolicies[index] = templateResult.collectionPolicies
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resolvedPolicyTemplates[index] = templateResult.policyTemplates
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result.controls = append(result.controls, templateResult.controls...)
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result.transfers = append(result.transfers, templateResult.transfers...)
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result.replacements = append(result.replacements, templateResult.replacements...)
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result.operations = append(result.operations, templateResult.operations...)
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count, _ := inheritanceLowerBoundCount(resolved[index], limits.nodes)
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retained += adapter.slotOverhead() + count
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if diagnostic := chargeInheritanceTemplateHistory(counter, templateResult, node); diagnostic != nil {
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return nil, []Diagnostic{*diagnostic}
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}
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}
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if diagnostics := finalizeInheritanceScope(adapter, result, templates, resolved, resolvedOrigins, resolvedPolicies, inputOrigins, limits); len(diagnostics) != 0 {
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return nil, diagnostics
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}
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return result, nil
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}
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