Add internal engine relocation candidate

internal/engine/parse.go

@@ -0,0 +1,62 @@
+package engine
+
+import (
+	"bytes"
+
+	"gitea.maximumdirect.net/eric/ConfigKit/internal/document"
+	yamladapter "gitea.maximumdirect.net/eric/ConfigKit/internal/yaml"
+)
+
+const (
+	maxDocumentDepth = 256
+	maxDocumentNodes = 1_000_000
+)
+
+type parseLimits struct {
+	source   sourceLimits
+	document yamladapter.Limits
+}
+
+func defaultParseLimits() parseLimits {
+	return parseLimits{
+		source: defaultSourceLimits(),
+		document: yamladapter.Limits{
+			Depth: maxDocumentDepth,
+			Nodes: maxDocumentNodes,
+		},
+	}
+}
+
+type parsedSource struct {
+	document *document.Node
+	source   *SourceInfo
+	bytes    int64
+}
+
+// parserDiagnostics translates adapter issues into detached, ordered public records.
+func parserDiagnostics(sourceID string, issues []yamladapter.Issue) []Diagnostic {
+	diagnostics := make([]Diagnostic, len(issues))
+	for index, issue := range issues {
+		diagnostics[index] = Diagnostic{
+			Code: Code(issue.Code), Severity: SeverityError, Message: issue.Message,
+			Primary: &Location{SourceID: sourceID, Line: issue.Line, Column: issue.Column},
+		}
+		for _, related := range issue.Related {
+			diagnostics[index].Related = append(diagnostics[index].Related, publicLocation(related))
+		}
+	}
+	return canonicalDiagnostics(diagnostics)
+}
+
+func parseSource(source Source, sourceID string, limits parseLimits) (parsedSource, []Diagnostic) {
+	read, diagnostics := readSource(source, sourceID, limits.source)
+	if len(diagnostics) != 0 || read.info == nil {
+		return parsedSource{source: read.info}, diagnostics
+	}
+
+	root, issues := yamladapter.Parse(bytes.NewReader(read.data), sourceID, limits.document)
+	if len(issues) != 0 {
+		return parsedSource{source: read.info, bytes: int64(len(read.data))}, parserDiagnostics(sourceID, issues)
+	}
+	return parsedSource{document: root, source: read.info, bytes: int64(len(read.data))}, nil
+}