implement commonmeta reader

README.md

@@ -14,7 +14,7 @@ Commonmeta reads and/or writes these metadata formats:
 
 | Format                                                                                           | Name          | Content Type                           | Read    | Write   |
 | ------------------------------------------------------------------------------------------------ | ------------- | -------------------------------------- | ------- | ------- |
-| [Commonmeta](https://docs.commonmeta.org)  | commonmeta    | application/vnd.commonmeta+json        | later     | yes     |
+| [Commonmeta](https://docs.commonmeta.org)  | commonmeta    | application/vnd.commonmeta+json        | yes     | yes     |
 | [CrossRef XML](https://www.crossref.org/schema/documentation/unixref1.1/unixref1.1.html) | crossrefxml      | application/vnd.crossref.unixref+xml   | later | later |
 | [Crossref](https://api.crossref.org)                                                             | crossref | application/vnd.crossref+json          | yes     | n/a     |
 | [DataCite](https://api.datacite.org/)                                                            | datacite | application/vnd.datacite.datacite+json | yes     | later |

cmd/convert.go

@@ -75,7 +75,9 @@ commonmeta 10.5555/12345678`,
 				return
 			}
 		} else if str != "" {
-			if from == "crossref" {
+			if from == "commonmeta" {
+				data, err = commonmeta.Load(str)
+			} else if from == "crossref" {
 				data, err = crossref.Load(str)
 			} else if from == "datacite" {
 				data, err = datacite.Load(str)
@@ -99,6 +101,6 @@ commonmeta 10.5555/12345678`,
 func init() {
 	rootCmd.AddCommand(convertCmd)
 
-	convertCmd.PersistentFlags().StringP("from", "f", "", "the format to convert from")
+	convertCmd.PersistentFlags().StringP("from", "f", "commonmeta", "the format to convert from")
 	convertCmd.PersistentFlags().StringP("to", "t", "commonmeta", "the format to convert to")
 }

cmd/decode.go

@@ -26,14 +26,4 @@ to quickly create a Cobra application.`,
 
 func init() {
 	rootCmd.AddCommand(decodeCmd)
-
-	// Here you will define your flags and configuration settings.
-
-	// Cobra supports Persistent Flags which will work for this command
-	// and all subcommands, e.g.:
-	// decodeCmd.PersistentFlags().String("foo", "", "A help for foo")
-
-	// Cobra supports local flags which will only run when this command
-	// is called directly, e.g.:
-	// decodeCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
 }

cmd/encode.go

@@ -26,14 +26,4 @@ to quickly create a Cobra application.`,
 
 func init() {
 	rootCmd.AddCommand(encodeCmd)
-
-	// Here you will define your flags and configuration settings.
-
-	// Cobra supports Persistent Flags which will work for this command
-	// and all subcommands, e.g.:
-	// encodeCmd.PersistentFlags().String("foo", "", "A help for foo")
-
-	// Cobra supports local flags which will only run when this command
-	// is called directly, e.g.:
-	// encodeCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
 }

cmd/version.go

@@ -15,20 +15,10 @@ var versionCmd = &cobra.Command{
 	Short: "Print the version number of commonmeta",
 	Long:  `All software has versions. This is commonmeta's`,
 	Run: func(cmd *cobra.Command, args []string) {
-		fmt.Println("Commonmeta v0.2.2 -- HEAD")
+		fmt.Println("Commonmeta v0.2.3 -- HEAD")
 	},
 }
 
 func init() {
 	rootCmd.AddCommand(versionCmd)
-
-	// Here you will define your flags and configuration settings.
-
-	// Cobra supports Persistent Flags which will work for this command
-	// and all subcommands, e.g.:
-	// versionCmd.PersistentFlags().String("foo", "", "A help for foo")
-
-	// Cobra supports local flags which will only run when this command
-	// is called directly, e.g.:
-	// versionCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
 }

commonmeta/commonmeta.go

@@ -4,7 +4,10 @@ package commonmeta
 import (
 	"bytes"
 	"encoding/json"
+	"errors"
 	"fmt"
+	"os"
+	"path"
 
 	"github.com/front-matter/commonmeta/schemautils"
 
@@ -232,6 +235,28 @@ type Title struct {
 	Language string `json:"language,omitempty"`
 }
 
+// Load loads the metadata for a single work from a JSON file
+func Load(filename string) (Data, error) {
+	var data Data
+
+	extension := path.Ext(filename)
+	if extension != ".json" {
+		return data, errors.New("invalid file extension")
+	}
+	file, err := os.Open(filename)
+	if err != nil {
+		return data, errors.New("error reading file")
+	}
+	defer file.Close()
+
+	decoder := json.NewDecoder(file)
+	err = decoder.Decode(&data)
+	if err != nil {
+		return data, err
+	}
+	return data, nil
+}
+
 // Read reads commonmeta metadata.
 func Read(content Data) (Data, error) {
 	data := content

schemautils/schemas/commonmeta_v0.13.json

@@ -12,8 +12,7 @@
         "properties": {
           "organization": { "$ref": "#/definitions/organization" }
         }
-      },
-      "uniqueItems": true
+      }
     },
     "contributorRole": {
       "description": "The type of contribution made by a contributor",
@@ -192,8 +191,7 @@
           "Internet Archive",
           "DWT"
         ]
-      },
-      "uniqueItems": true
+      }
     },
     "container": {
       "description": "The container of the resource.",
@@ -257,13 +255,11 @@
             "items": {
               "$ref": "#/definitions/contributorRole"
             },
-            "type": "array",
-            "uniqueItems": true
+            "type": "array"
           }
         }
       },
-      "minItems": 1,
-      "uniqueItems": true
+      "minItems": 1
     },
     "date": {
       "description": "The dates for the resource.",
@@ -342,8 +338,7 @@
         },
         "required": ["url"]
       },
-      "minItems": 1,
-      "uniqueItems": true
+      "minItems": 1
     },
     "fundingReferences": {
       "description": "The funding references for the resource.",
@@ -488,8 +483,7 @@
         },
         "required": ["id", "type"]
       },
-      "minItems": 1,
-      "uniqueItems": true
+      "minItems": 1
     },
     "references": {
       "type": "array",
@@ -512,8 +506,7 @@
           "unstructured": { "type": "string" }
         },
         "required": ["key"]
-      },
-      "uniqueItems": true
+      }
     },
     "subjects": {
       "type": "array",
@@ -527,8 +520,7 @@
           }
         },
         "required": ["subject"]
-      },
-      "uniqueItems": true
+      }
     },
     "titles": {
       "description": "The titles of the resource.",
@@ -551,8 +543,7 @@
           }
         },
         "required": ["title"]
-      },
-      "uniqueItems": true
+      }
     },
     "url": {
       "description": "The URL of the resource.",