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feat(x/data/v2/client)!: add generate-iri command (#2190)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| package client | ||
|
|
||
| import ( | ||
| "crypto" | ||
| "encoding/json" | ||
| "fmt" | ||
| "os" | ||
| "path/filepath" | ||
|
|
||
| "github.com/piprate/json-gold/ld" | ||
| "github.com/spf13/cobra" | ||
|
|
||
| "github.com/regen-network/regen-ledger/x/data/v2" | ||
| ) | ||
|
|
||
| func GenerateIRI() *cobra.Command { | ||
| return &cobra.Command{ | ||
| Use: "generate-iri [filename]", | ||
| Short: "Creates the content IRI for a file", | ||
| Long: "Creates the content IRI for a file. If the extension is .jsonld, a graph IRI will be created, otherwise a raw IRI will be created.", | ||
| Example: formatExample(`regen q data generate-iri myfile.ext`), | ||
| Args: cobra.ExactArgs(1), | ||
| RunE: func(cmd *cobra.Command, args []string) error { | ||
| _, ctx, err := mkQueryClient(cmd) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| filename := args[0] | ||
| ext := filepath.Ext(filename) | ||
| contents, err := os.ReadFile(filename) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to read file: %w", err) | ||
| } | ||
|
|
||
| ch := &data.ContentHash{} | ||
| switch ext { | ||
| case ".jsonld": | ||
| proc := ld.NewJsonLdProcessor() | ||
| opts := ld.NewJsonLdOptions("") | ||
| opts.Format = "application/n-quads" | ||
| opts.Algorithm = ld.AlgorithmURDNA2015 | ||
|
|
||
| var doc map[string]interface{} | ||
| err = json.Unmarshal(contents, &doc) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to unmarshal json: %w", err) | ||
| } | ||
|
|
||
| normalizedTriples, err := proc.Normalize(doc, opts) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to normalize json: %w", err) | ||
| } | ||
|
|
||
| hash, err := blake2b256hash(fmt.Sprintf("%s", normalizedTriples)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| ch.Graph = &data.ContentHash_Graph{ | ||
| Hash: hash, | ||
| DigestAlgorithm: data.DigestAlgorithm_DIGEST_ALGORITHM_BLAKE2B_256, | ||
| CanonicalizationAlgorithm: data.GraphCanonicalizationAlgorithm_GRAPH_CANONICALIZATION_ALGORITHM_URDNA2015, | ||
| MerkleTree: data.GraphMerkleTree_GRAPH_MERKLE_TREE_NONE_UNSPECIFIED, | ||
| } | ||
| default: | ||
| hash, err := blake2b256hash(string(contents)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| ext = ext[1:] // take the . off the extension | ||
| mediaType := data.RawMediaTypeFromExt(ext) | ||
|
|
||
| ch.Raw = &data.ContentHash_Raw{ | ||
| Hash: hash, | ||
| DigestAlgorithm: data.DigestAlgorithm_DIGEST_ALGORITHM_BLAKE2B_256, | ||
| MediaType: mediaType, | ||
| } | ||
| } | ||
|
|
||
| iri, err := ch.ToIRI() | ||
| if err != nil { | ||
| return fmt.Errorf("failed to convert content hash to IRI: %w", err) | ||
| } | ||
|
|
||
| return ctx.PrintString(iri) | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| func blake2b256hash(contents string) ([]byte, error) { | ||
| hasher := crypto.BLAKE2b_256.New() | ||
| _, err := hasher.Write([]byte(contents)) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to hash normalized triples: %w", err) | ||
| } | ||
| return hasher.Sum(nil), nil | ||
| } |
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