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// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
package parser2v2
import (
"fmt"
gordfParser "github.com/RishabhBhatnagar/gordf/rdfloader/parser"
"github.com/spdx/tools-golang/spdx"
"strconv"
"strings"
)
// Snippet Information
// Cardinality: Optional, Many
func (parser *rdfParser2_2) getSnippetInformationFromTriple2_2(triple *gordfParser.Triple) (si *spdx.Snippet2_2, err error) {
si = &spdx.Snippet2_2{}
err = setSnippetID(triple.Subject.ID, si)
if err != nil {
return nil, err
}
for _, siTriple := range parser.nodeToTriples(triple.Subject) {
switch siTriple.Predicate.ID {
case RDF_TYPE:
// cardinality: exactly 1
case SPDX_SNIPPET_FROM_FILE:
// cardinality: exactly 1
// file which is associated with the snippet
file, err := parser.getFileFromNode(siTriple.Object)
if err != nil {
return nil, err
}
si.SnippetFromFileSPDXIdentifier, err = ExtractDocElementID(getLastPartOfURI(siTriple.Object.ID))
parser.files[file.FileSPDXIdentifier] = file
case SPDX_NAME:
si.SnippetName = siTriple.Object.ID
case SPDX_COPYRIGHT_TEXT:
si.SnippetCopyrightText = siTriple.Object.ID
case SPDX_LICENSE_COMMENTS:
si.SnippetLicenseComments = siTriple.Object.ID
case SPDX_LICENSE_INFO_IN_SNIPPET:
si.LicenseInfoInSnippet = append(si.LicenseInfoInSnippet, siTriple.Object.ID)
case RDFS_COMMENT:
si.SnippetComment = siTriple.Object.ID
case SPDX_LICENSE_CONCLUDED:
si.SnippetLicenseConcluded = siTriple.Object.ID
case SPDX_RANGE:
// cardinality: min 1
err = parser.setSnippetRangeFromNode(siTriple.Object, si)
if err != nil {
return nil, err
}
default:
return nil, fmt.Errorf("unknown predicate %v", siTriple.Predicate.ID)
}
}
return si, nil
}
// given is the id of the file, sets the snippet to the file in parser.
func (parser *rdfParser2_2) setSnippetToFileWithID(snippet *spdx.Snippet2_2, fileID spdx.ElementID) error {
if parser.files[fileID] == nil {
return fmt.Errorf("snippet refers to an undefined file with ID: %s", fileID)
}
// initializing snippet of the files if it is not defined already
if parser.files[fileID].Snippets == nil {
parser.files[fileID].Snippets = map[spdx.ElementID]*spdx.Snippet2_2{}
}
// setting the snippet to the file.
parser.files[fileID].Snippets[snippet.SnippetSPDXIdentifier] = snippet
return nil
}
func (parser *rdfParser2_2) setSnippetRangeFromNode(node *gordfParser.Node, si *spdx.Snippet2_2) error {
// todo: apply DRY in this method.
rangeType := 0 // 0: undefined range, 1: byte, 2: line
var start, end string
for _, t := range parser.nodeToTriples(node) {
switch t.Predicate.ID {
case RDF_TYPE:
if t.Object.ID != PTR_START_END_POINTER {
return fmt.Errorf("expected range to have sub tag of type StartEndPointer, found %v", t.Object.ID)
}
case PTR_START_POINTER:
for _, subTriple := range parser.nodeToTriples(t.Object) {
switch subTriple.Predicate.ID {
case RDF_TYPE:
switch subTriple.Object.ID {
case PTR_BYTE_OFFSET_POINTER:
if rangeType == 2 {
return fmt.Errorf("byte offset pointer merged with line offset pointer")
}
rangeType = 1
case PTR_LINE_CHAR_POINTER:
if rangeType == 1 {
return fmt.Errorf("byte offset pointer merged with line offset pointer")
}
rangeType = 2
default:
return fmt.Errorf("illegal pointer type %v", subTriple.Object.ID)
}
case PTR_REFERENCE:
err := parser.parseRangeReference(subTriple.Object, si)
if err != nil {
return nil
}
case PTR_OFFSET, PTR_LINE_NUMBER:
start = subTriple.Object.ID
default:
return fmt.Errorf("undefined predicate %v while parsing range", subTriple.Predicate.ID)
}
}
case PTR_END_POINTER:
subTriples := parser.nodeToTriples(t.Object)
for _, subTriple := range subTriples {
switch subTriple.Predicate.ID {
case RDF_TYPE:
switch subTriple.Object.ID {
case PTR_BYTE_OFFSET_POINTER:
if rangeType == 2 {
return fmt.Errorf("byte offset pointer merged with line offset pointer")
}
rangeType = 1
case PTR_LINE_CHAR_POINTER:
if rangeType == 1 {
return fmt.Errorf("byte offset pointer merged with line offset pointer")
}
rangeType = 2
default:
return fmt.Errorf("illegal pointer type %v", subTriple.Object.ID)
}
case PTR_REFERENCE:
err := parser.parseRangeReference(subTriple.Object, si)
if err != nil {
return nil
}
case PTR_OFFSET, PTR_LINE_NUMBER:
end = subTriple.Object.ID
}
}
default:
return fmt.Errorf("unknown predicate %v", t.Predicate.ID)
}
}
if rangeType != 1 && rangeType != 2 {
return fmt.Errorf("undefined range type")
}
startNumber, err := strconv.Atoi(strings.TrimSpace(start))
if err != nil {
return fmt.Errorf("invalid number for range start: %v", start)
}
endNumber, err := strconv.Atoi(strings.TrimSpace(end))
if err != nil {
return fmt.Errorf("invalid number for range end: %v", end)
}
if rangeType == 1 {
// byte range
si.SnippetByteRangeStart = startNumber
si.SnippetByteRangeEnd = endNumber
} else {
// line range
si.SnippetLineRangeStart = startNumber
si.SnippetLineRangeEnd = endNumber
}
return nil
}
func (parser *rdfParser2_2) parseRangeReference(node *gordfParser.Node, snippet *spdx.Snippet2_2) error {
// reference is supposed to be either a resource reference to a file or a new file
// Unfortunately, I didn't find field where this can be set in the tools-golang data model.
// todo: set this reference to the snippet
switch node.NodeType {
case gordfParser.RESOURCELITERAL, gordfParser.LITERAL, gordfParser.BLANK:
return nil
}
file, err := parser.getFileFromNode(node)
if err != nil {
return fmt.Errorf("error parsing a new file in a reference")
}
// a new file found within the pointer reference is an unpackaged file.
if parser.doc.UnpackagedFiles == nil {
parser.doc.UnpackagedFiles = map[spdx.ElementID]*spdx.File2_2{}
}
parser.doc.UnpackagedFiles[file.FileSPDXIdentifier] = file
return nil
}
func setSnippetID(uri string, si *spdx.Snippet2_2) (err error) {
fragment := getLastPartOfURI(uri)
si.SnippetSPDXIdentifier, err = ExtractElementID(fragment)
if err != nil {
return fmt.Errorf("error setting snippet identifier: %v", uri)
}
return nil
}
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