295 lines
8.5 KiB
Go
295 lines
8.5 KiB
Go
package engine
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import "gitea.maximumdirect.net/eric/ConfigKit/internal/document"
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type historyPhase uint8
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const (
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historyPhaseBaseline historyPhase = iota
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historyPhaseSources
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historyPhaseInheritance
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historyPhasePreCLI
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historyPhaseCLI
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historyPhasePostCLI
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historyPhaseResolution
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)
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type historyRole uint8
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const (
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historyRoleDefinition historyRole = iota
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historyRoleContribution
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historyRoleCompositeDefinition
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historyRoleOperation
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historyRoleControl
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historyRoleCheckpoint
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historyRoleInventory
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)
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type historyPayloadRef struct {
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phase historyPhase
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id int
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substep int
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}
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type historyAttributionRef int
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const noHistoryAttribution historyAttributionRef = -1
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type historyAttribution struct {
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origin Origin
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reasons []string
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dependencies []Path
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}
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type historyObservation struct {
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path Path
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phase historyPhase
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payload historyPayloadRef
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reportedPath Path
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role historyRole
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beforePresent bool
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afterPresent bool
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sensitive bool
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attributionRef historyAttributionRef
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}
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type historyModel struct {
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observations []historyObservation
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attributions []historyAttribution
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baseline *document.Node
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final *document.Node
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sourcePayloads []historySourcePayload
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inheritancePayloads []historyInheritancePayload
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cliPayloads []historySourcePayload
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resolutionPayload *historyResolutionPayload
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preCLICheckpoint *historyCheckpointPayload
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postCLICheckpoint *historyCheckpointPayload
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shapesByPointer map[string][]Path
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shapeOrder []Path
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observationsByPointer map[string][]int
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reportedPathIndex pathPrefixIndex
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documentLookup *documentLookup
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frozen bool
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}
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// historyBuilder owns the model while loading. Its scratch document is one
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// mutable working projection used to resolve concrete sides of relative
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// producer effects; it is not retained by the published model.
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type historyBuilder struct {
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model *historyModel
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nextPayloadIDs map[historyPhase]int
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scratch *document.Node
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prefixReady bool
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}
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func newHistoryBuilder() *historyBuilder {
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return &historyBuilder{
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model: &historyModel{
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shapesByPointer: make(map[string][]Path),
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observationsByPointer: make(map[string][]int),
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},
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nextPayloadIDs: make(map[historyPhase]int),
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}
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}
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func (builder *historyBuilder) nextPayload(phase historyPhase) historyPayloadRef {
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builder.requireOpen()
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id := builder.nextPayloadIDs[phase]
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builder.nextPayloadIDs[phase] = id + 1
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return historyPayloadRef{phase: phase, id: id}
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}
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func (builder *historyBuilder) addAttribution(origin Origin, reasons []string, dependencies []Path) historyAttributionRef {
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builder.requireOpen()
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ref := historyAttributionRef(len(builder.model.attributions))
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builder.model.attributions = append(builder.model.attributions, historyAttribution{
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origin: cloneOrigin(origin),
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reasons: append([]string(nil), reasons...),
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dependencies: clonePaths(dependencies),
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})
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return ref
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}
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func (builder *historyBuilder) addObservation(observation historyObservation) int {
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builder.requireOpen()
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if !observation.path.valid() || !concreteHistoryPath(observation.path) || !observation.reportedPath.valid() {
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return -1
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}
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if observation.attributionRef < noHistoryAttribution || int(observation.attributionRef) >= len(builder.model.attributions) {
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return -1
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}
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observation.path = observation.path.clone()
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observation.reportedPath = observation.reportedPath.clone()
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observationID := len(builder.model.observations)
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builder.model.observations = append(builder.model.observations, observation)
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builder.addShape(observation.path)
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switch observation.role {
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case historyRoleDefinition, historyRoleContribution, historyRoleCompositeDefinition, historyRoleCheckpoint:
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pointer := observation.path.String()
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builder.model.observationsByPointer[pointer] = append(builder.model.observationsByPointer[pointer], observationID)
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if observation.role == historyRoleContribution {
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builder.model.reportedPathIndex.insert(pointer, observationID)
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}
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case historyRoleOperation, historyRoleControl:
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builder.model.reportedPathIndex.insert(observation.reportedPath.String(), observationID)
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}
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return observationID
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}
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func (builder *historyBuilder) observeDocument(root *document.Node, phase historyPhase) {
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builder.observeDocumentAt(root, Path{}, phase)
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}
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func (builder *historyBuilder) observeDocumentAt(root *document.Node, prefix Path, phase historyPhase) {
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builder.requireOpen()
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if root == nil {
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return
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}
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payload := builder.nextPayload(phase)
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walkDocument(root, prefix, func(path Path, node *document.Node) {
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builder.addInventoryObservation(path, path, payload, phase, node.Sensitive)
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})
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}
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func (builder *historyBuilder) addInventoryObservation(path, reportedPath Path, payload historyPayloadRef, phase historyPhase, sensitive bool) int {
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return builder.addObservation(historyObservation{
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path: path, phase: phase, payload: payload,
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reportedPath: reportedPath, role: historyRoleInventory,
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sensitive: sensitive, attributionRef: noHistoryAttribution,
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})
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}
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func (builder *historyBuilder) setScratch(root *document.Node) {
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builder.requireOpen()
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builder.scratch = document.Clone(root)
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}
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func (builder *historyBuilder) scratchAt(path Path) (*document.Node, bool) {
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builder.requireOpen()
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return documentAtPath(builder.scratch, path)
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}
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// advanceScratch transfers the next working projection to the builder. Callers
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// use it after applying existing value-replay helpers to the current scratch
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// document, avoiding a retained tree copy for each operation.
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func (builder *historyBuilder) advanceScratch(root *document.Node) {
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builder.requireOpen()
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builder.scratch = root
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}
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func (builder *historyBuilder) freeze() *historyModel {
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builder.requireOpen()
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builder.scratch = nil
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builder.model.documentLookup = buildDocumentLookup(builder.model.documentRoots()...)
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builder.model.frozen = true
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model := builder.model
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builder.model = nil
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builder.nextPayloadIDs = nil
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return model
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}
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func (model *historyModel) documentRoots() []*document.Node {
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if model == nil {
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return nil
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}
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var roots []*document.Node
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appendRoot := func(root *document.Node) {
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if root != nil {
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roots = append(roots, root)
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}
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}
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appendRoot(model.baseline)
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appendRoot(model.final)
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for _, payload := range model.sourcePayloads {
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if payload.kind == historySourceApplicationPayload {
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appendRoot(payload.application.value)
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}
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}
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for _, payload := range model.inheritancePayloads {
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for _, operation := range payload.operations {
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appendRoot(operation.parent)
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appendRoot(operation.effective)
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}
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}
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for _, payload := range model.cliPayloads {
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if payload.kind == historySourceApplicationPayload {
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appendRoot(payload.application.value)
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}
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}
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if model.preCLICheckpoint != nil {
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appendRoot(model.preCLICheckpoint.root)
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}
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if model.postCLICheckpoint != nil {
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appendRoot(model.postCLICheckpoint.root)
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}
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if model.resolutionPayload != nil {
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for _, snapshot := range model.resolutionPayload.snapshots {
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appendRoot(snapshot.before)
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appendRoot(snapshot.after)
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}
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}
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return roots
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}
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func (model *historyModel) documentAt(root *document.Node, path Path) (*document.Node, bool) {
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if model == nil || model.documentLookup == nil {
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return nil, false
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}
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return documentAtPathWithLookup(root, path, model.documentLookup)
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}
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func (builder *historyBuilder) addShape(path Path) {
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pointer := path.String()
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for _, existing := range builder.model.shapesByPointer[pointer] {
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if sameConcreteHistoryPath(existing, path) {
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return
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}
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}
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owned := path.clone()
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builder.model.shapesByPointer[pointer] = append(builder.model.shapesByPointer[pointer], owned)
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builder.model.shapeOrder = append(builder.model.shapeOrder, owned.clone())
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}
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func (builder *historyBuilder) requireOpen() {
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if builder == nil || builder.model == nil || builder.model.frozen {
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panic("configkit: history builder is no longer active")
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}
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}
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func concreteHistoryPath(path Path) bool {
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for _, segment := range path.segments {
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if segment.kind == pathSegmentParsed {
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return false
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}
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}
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return true
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}
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func sameConcreteHistoryPath(left, right Path) bool {
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if len(left.segments) != len(right.segments) {
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return false
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}
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for index, leftSegment := range left.segments {
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rightSegment := right.segments[index]
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if leftSegment.kind != rightSegment.kind {
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return false
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}
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switch leftSegment.kind {
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case pathSegmentKey:
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if leftSegment.key != rightSegment.key {
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return false
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}
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case pathSegmentIndex:
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if leftSegment.index != rightSegment.index {
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return false
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}
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default:
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return false
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}
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}
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return true
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}
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