1 import {EventEmitter} from '@angular/core';
3 /* Wrapper class for our external MARC21.Record JS library. */
7 // MARC breaker delimiter
10 export interface MarcSubfield // code, value, position
11 extends Array<string|number> { 0: string; 1: string; 2: number; }
13 // Only contains the attributes/methods we need so far.
14 export interface MarcField {
20 subfields?: MarcSubfield[];
22 // For authority validation
26 // Fields are immutable when it comes to controlfield vs.
27 // data field. Stamp the value when stamping field IDs.
30 // Pass-through to marcrecord.js
31 isControlfield(): boolean;
32 indicator?: (ind: number) => any;
34 deleteExactSubfields(...subfield: MarcSubfield[]): number;
37 export class MarcRecord {
39 id: number; // Database ID when known.
41 record: any; // MARC21.Record object
44 // Let clients know some fixed field shuffling may have occured.
45 // Emits the fixed field code.
46 fixedFieldChange: EventEmitter<string>;
48 get leader(): string {
49 return this.record.leader;
52 set leader(l: string) {
53 this.record.leader = l;
56 get fields(): MarcField[] {
57 return this.record.fields;
60 set fields(f: MarcField[]) {
61 this.record.fields = f;
64 constructor(xml?: string) {
65 this.record = new MARC21.Record({marcxml: xml, delimiter: DELIMITER});
66 this.breakerText = this.record.toBreaker();
67 this.fixedFieldChange = new EventEmitter<string>();
71 return this.record.toXmlString();
75 return this.record.toBreaker();
78 recordType(): string {
79 return this.record.recordType();
82 absorbBreakerChanges() {
83 this.record = new MARC21.Record(
84 {marcbreaker: this.breakerText, delimiter: DELIMITER});
87 extractFixedField(fieldCode: string): string {
88 return this.record.extractFixedField(fieldCode);
91 setFixedField(fieldCode: string, fieldValue: string): string {
92 const response = this.record.setFixedField(fieldCode, fieldValue);
93 this.fixedFieldChange.emit(fieldCode);
97 // Give each field an identifier so it may be referenced later.
99 this.fields.forEach(f => this.stampFieldId(f));
102 // Stamp field IDs the the initial isCtrlField state.
103 stampFieldId(field: MarcField) {
104 if (!field.fieldId) {
105 field.fieldId = Math.floor(Math.random() * 10000000);
108 if (field.isCtrlField === undefined) {
109 field.isCtrlField = field.isControlfield();
113 field(spec: string, wantArray?: boolean): MarcField | MarcField[] {
114 return this.record.field(spec, wantArray);
117 appendFields(...newFields: MarcField[]) {
118 this.record.appendFields.apply(this.record, newFields);
119 this.stampFieldIds();
122 insertFieldsBefore(field: MarcField, ...newFields: MarcField[]) {
123 this.record.insertFieldsBefore.apply(
124 this.record, [field].concat(newFields));
125 this.stampFieldIds();
128 insertFieldsAfter(field: MarcField, ...newFields: MarcField[]) {
129 this.record.insertFieldsAfter.apply(
130 this.record, [field].concat(newFields));
131 this.stampFieldIds();
134 insertOrderedFields(...newFields: MarcField[]) {
135 this.record.insertOrderedFields.apply(this.record, newFields);
136 this.stampFieldIds();
139 generate008(): MarcField {
140 return this.record.generate008();
144 deleteFields(...fields: MarcField[]) {
145 this.record.deleteFields.apply(this.record, fields);
148 getField(id: number): MarcField {
149 return this.fields.filter(f => f.fieldId === id)[0];
152 getPreviousField(id: number): MarcField {
153 for (let idx = 0; idx < this.fields.length; idx++) {
154 if (this.fields[idx].fieldId === id) {
155 return this.fields[idx - 1];
160 getNextField(id: number): MarcField {
161 for (let idx = 0; idx < this.fields.length; idx++) {
162 if (this.fields[idx].fieldId === id) {
163 return this.fields[idx + 1];
168 // Turn an field-ish object into a proper MARC.Field
169 newField(props: any): MarcField {
170 const field = new MARC21.Field(props);
171 this.stampFieldId(field);
175 cloneField(field: any): MarcField {
176 const props: any = {tag: field.tag};
178 if (field.isControlfield()) {
179 props.data = field.data;
182 props.ind1 = field.ind1;
183 props.ind2 = field.ind2;
184 props.subfields = this.cloneSubfields(field.subfields);
187 return this.newField(props);
190 cloneSubfields(subfields: MarcSubfield[]): MarcSubfield[] {
192 subfields.forEach(sf => root.push([].concat(sf)));
196 // Returns a list of values for the tag + subfield combo
197 subfield(tag: string, subfield: string): string {
198 return this.record.subfield(tag, subfield);