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 // Fields are immutable when it comes to controlfield vs.
23 // data field. Stamp the value when stamping field IDs.
26 // Pass-through to marcrecord.js
27 isControlfield(): boolean;
29 deleteExactSubfields(...subfield: MarcSubfield[]): number;
32 export class MarcRecord {
34 id: number; // Database ID when known.
36 record: any; // MARC21.Record object
39 // Let clients know some fixed field shuffling may have occured.
40 // Emits the fixed field code.
41 fixedFieldChange: EventEmitter<string>;
43 get leader(): string {
44 return this.record.leader;
47 set leader(l: string) {
48 this.record.leader = l;
51 get fields(): MarcField[] {
52 return this.record.fields;
55 set fields(f: MarcField[]) {
56 this.record.fields = f;
59 constructor(xml: string) {
60 this.record = new MARC21.Record({marcxml: xml, delimiter: DELIMITER});
61 this.breakerText = this.record.toBreaker();
62 this.fixedFieldChange = new EventEmitter<string>();
66 return this.record.toXmlString();
70 return this.record.toBreaker();
73 recordType(): string {
74 return this.record.recordType();
77 absorbBreakerChanges() {
78 this.record = new MARC21.Record(
79 {marcbreaker: this.breakerText, delimiter: DELIMITER});
82 extractFixedField(fieldCode: string): string {
83 return this.record.extractFixedField(fieldCode);
86 setFixedField(fieldCode: string, fieldValue: string): string {
87 const response = this.record.setFixedField(fieldCode, fieldValue);
88 this.fixedFieldChange.emit(fieldCode);
92 // Give each field an identifier so it may be referenced later.
94 this.fields.forEach(f => this.stampFieldId(f));
97 // Stamp field IDs the the initial isCtrlField state.
98 stampFieldId(field: MarcField) {
100 field.fieldId = Math.floor(Math.random() * 10000000);
103 if (field.isCtrlField === undefined) {
104 field.isCtrlField = field.isControlfield();
108 field(spec: string, wantArray?: boolean): MarcField | MarcField[] {
109 return this.record.field(spec, wantArray);
112 insertFieldsBefore(field: MarcField, ...newFields: MarcField[]) {
113 this.record.insertFieldsBefore.apply(
114 this.record, [field].concat(newFields));
115 this.stampFieldIds();
118 insertFieldsAfter(field: MarcField, ...newFields: MarcField[]) {
119 this.record.insertFieldsAfter.apply(
120 this.record, [field].concat(newFields));
121 this.stampFieldIds();
124 insertOrderedFields(...newFields: MarcField[]) {
125 this.record.insertOrderedFields.apply(this.record, newFields);
126 this.stampFieldIds();
129 generate008(): MarcField {
130 return this.record.generate008();
134 deleteFields(...fields: MarcField[]) {
135 this.record.deleteFields.apply(this.record, fields);
138 getField(id: number): MarcField {
139 return this.fields.filter(f => f.fieldId === id)[0];
142 getPreviousField(id: number): MarcField {
143 for (let idx = 0; idx < this.fields.length; idx++) {
144 if (this.fields[idx].fieldId === id) {
145 return this.fields[idx - 1];
150 getNextField(id: number): MarcField {
151 for (let idx = 0; idx < this.fields.length; idx++) {
152 if (this.fields[idx].fieldId === id) {
153 return this.fields[idx + 1];
158 // Turn an field-ish object into a proper MARC.Field
159 newField(props: any): MarcField {
160 const field = new MARC21.Field(props);
161 this.stampFieldId(field);
165 cloneField(field: any): MarcField {
166 const props: any = {tag: field.tag};
168 if (field.isControlfield()) {
169 props.data = field.data;
172 props.ind1 = field.ind1;
173 props.ind2 = field.ind2;
174 props.subfields = this.cloneSubfields(field.subfields);
177 return this.newField(props);
180 cloneSubfields(subfields: MarcSubfield[]): MarcSubfield[] {
182 subfields.forEach(sf => root.push([].concat(sf)));