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;
33 deleteExactSubfields(...subfield: MarcSubfield[]): number;
36 export class MarcRecord {
38 id: number; // Database ID when known.
40 record: any; // MARC21.Record object
43 // Let clients know some fixed field shuffling may have occured.
44 // Emits the fixed field code.
45 fixedFieldChange: EventEmitter<string>;
47 get leader(): string {
48 return this.record.leader;
51 set leader(l: string) {
52 this.record.leader = l;
55 get fields(): MarcField[] {
56 return this.record.fields;
59 set fields(f: MarcField[]) {
60 this.record.fields = f;
63 constructor(xml?: string) {
64 this.record = new MARC21.Record({marcxml: xml, delimiter: DELIMITER});
65 this.breakerText = this.record.toBreaker();
66 this.fixedFieldChange = new EventEmitter<string>();
70 return this.record.toXmlString();
74 return this.record.toBreaker();
77 recordType(): string {
78 return this.record.recordType();
81 absorbBreakerChanges() {
82 this.record = new MARC21.Record(
83 {marcbreaker: this.breakerText, delimiter: DELIMITER});
86 extractFixedField(fieldCode: string): string {
87 return this.record.extractFixedField(fieldCode);
90 setFixedField(fieldCode: string, fieldValue: string): string {
91 const response = this.record.setFixedField(fieldCode, fieldValue);
92 this.fixedFieldChange.emit(fieldCode);
96 // Give each field an identifier so it may be referenced later.
98 this.fields.forEach(f => this.stampFieldId(f));
101 // Stamp field IDs the the initial isCtrlField state.
102 stampFieldId(field: MarcField) {
103 if (!field.fieldId) {
104 field.fieldId = Math.floor(Math.random() * 10000000);
107 if (field.isCtrlField === undefined) {
108 field.isCtrlField = field.isControlfield();
112 field(spec: string, wantArray?: boolean): MarcField | MarcField[] {
113 return this.record.field(spec, wantArray);
116 appendFields(...newFields: MarcField[]) {
117 this.record.appendFields.apply(this.record, newFields);
118 this.stampFieldIds();
121 insertFieldsBefore(field: MarcField, ...newFields: MarcField[]) {
122 this.record.insertFieldsBefore.apply(
123 this.record, [field].concat(newFields));
124 this.stampFieldIds();
127 insertFieldsAfter(field: MarcField, ...newFields: MarcField[]) {
128 this.record.insertFieldsAfter.apply(
129 this.record, [field].concat(newFields));
130 this.stampFieldIds();
133 insertOrderedFields(...newFields: MarcField[]) {
134 this.record.insertOrderedFields.apply(this.record, newFields);
135 this.stampFieldIds();
138 generate008(): MarcField {
139 return this.record.generate008();
143 deleteFields(...fields: MarcField[]) {
144 this.record.deleteFields.apply(this.record, fields);
147 getField(id: number): MarcField {
148 return this.fields.filter(f => f.fieldId === id)[0];
151 getPreviousField(id: number): MarcField {
152 for (let idx = 0; idx < this.fields.length; idx++) {
153 if (this.fields[idx].fieldId === id) {
154 return this.fields[idx - 1];
159 getNextField(id: number): MarcField {
160 for (let idx = 0; idx < this.fields.length; idx++) {
161 if (this.fields[idx].fieldId === id) {
162 return this.fields[idx + 1];
167 // Turn an field-ish object into a proper MARC.Field
168 newField(props: any): MarcField {
169 const field = new MARC21.Field(props);
170 this.stampFieldId(field);
174 cloneField(field: any): MarcField {
175 const props: any = {tag: field.tag};
177 if (field.isControlfield()) {
178 props.data = field.data;
181 props.ind1 = field.ind1;
182 props.ind2 = field.ind2;
183 props.subfields = this.cloneSubfields(field.subfields);
186 return this.newField(props);
189 cloneSubfields(subfields: MarcSubfield[]): MarcSubfield[] {
191 subfields.forEach(sf => root.push([].concat(sf)));
195 // Returns a list of values for the tag + subfield combo
196 subfield(tag: string, subfield: string): string {
197 return this.record.subfield(tag, subfield);