github.com/boki/go-xmp@v1.0.1/models/xmp_rights/model.go (about)

     1  // Copyright (c) 2017-2018 Alexander Eichhorn
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License"): you may
     4  // not use this file except in compliance with the License. You may obtain
     5  // a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
    11  // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
    12  // License for the specific language governing permissions and limitations
    13  // under the License.
    14  
    15  // Package xmprights implements the XMP Rights management namespace as defined by XMP Specification Part 1.
    16  package xmprights
    17  
    18  import (
    19  	"fmt"
    20  	"trimmer.io/go-xmp/xmp"
    21  )
    22  
    23  var (
    24  	NsXmpRights = xmp.NewNamespace("xmpRights", "http://ns.adobe.com/xap/1.0/rights/", NewModel)
    25  )
    26  
    27  func init() {
    28  	xmp.Register(NsXmpRights, xmp.XmpMetadata, xmp.RightsMetadata)
    29  }
    30  
    31  func NewModel(name string) xmp.Model {
    32  	return &XmpRights{}
    33  }
    34  
    35  func MakeModel(d *xmp.Document) (*XmpRights, error) {
    36  	m, err := d.MakeModel(NsXmpRights)
    37  	if err != nil {
    38  		return nil, err
    39  	}
    40  	x, _ := m.(*XmpRights)
    41  	return x, nil
    42  }
    43  
    44  func FindModel(d *xmp.Document) *XmpRights {
    45  	if m := d.FindModel(NsXmpRights); m != nil {
    46  		return m.(*XmpRights)
    47  	}
    48  	return nil
    49  }
    50  
    51  type XmpRights struct {
    52  	Certificate  string          `xmp:"xmpRights:Certificate"`
    53  	Marked       xmp.Bool        `xmp:"xmpRights:Marked"`
    54  	Owner        xmp.StringArray `xmp:"xmpRights:Owner"`
    55  	UsageTerms   xmp.AltString   `xmp:"xmpRights:UsageTerms"`
    56  	WebStatement string          `xmp:"xmpRights:WebStatement"`
    57  }
    58  
    59  func (x XmpRights) Can(nsName string) bool {
    60  	return NsXmpRights.GetName() == nsName
    61  }
    62  
    63  func (x XmpRights) Namespaces() xmp.NamespaceList {
    64  	return xmp.NamespaceList{NsXmpRights}
    65  }
    66  
    67  func (x *XmpRights) SyncModel(d *xmp.Document) error {
    68  	return nil
    69  }
    70  
    71  func (x *XmpRights) SyncFromXMP(d *xmp.Document) error {
    72  	return nil
    73  }
    74  
    75  func (x XmpRights) SyncToXMP(d *xmp.Document) error {
    76  	return nil
    77  }
    78  
    79  func (x *XmpRights) CanTag(tag string) bool {
    80  	_, err := xmp.GetNativeField(x, tag)
    81  	return err == nil
    82  }
    83  
    84  func (x *XmpRights) GetTag(tag string) (string, error) {
    85  	if v, err := xmp.GetNativeField(x, tag); err != nil {
    86  		return "", fmt.Errorf("%s: %v", NsXmpRights.GetName(), err)
    87  	} else {
    88  		return v, nil
    89  	}
    90  }
    91  
    92  func (x *XmpRights) SetTag(tag, value string) error {
    93  	if err := xmp.SetNativeField(x, tag, value); err != nil {
    94  		return fmt.Errorf("%s: %v", NsXmpRights.GetName(), err)
    95  	}
    96  	return nil
    97  }