add cite reference command

main.ts

@@ -1,5 +1,5 @@
-import { Editor, MarkdownView, Plugin, TFile, parseYaml, Notice } from 'obsidian';
-import { parseQuote, Quote, replaceDoubleQuotes, guessCiteId, CslReference } from 'src/quotes';
+import { Editor, MarkdownView, Plugin, TFile, parseYaml, Notice, FuzzySuggestModal, App, FuzzyMatch } from 'obsidian';
+import { parseQuote, Quote, replaceDoubleQuotes, guessCiteId, CslReference, cslReferenceSummary } from 'src/quotes';
 
 export default class PasteQuotePlugin extends Plugin {
 	async onload() {
@@ -14,6 +14,12 @@ export default class PasteQuotePlugin extends Plugin {
 			name: 'Paste CSL YAML',
 			editorCallback: this.pasteCslYaml.bind(this),
 		});
+
+		this.addCommand({
+			id: 'cite-reference',
+			name: 'Cite Reference',
+			editorCallback: this.citeReference.bind(this),
+		});
 	}
 
 	async pasteQuote(editor: Editor, view: MarkdownView) {
@@ -123,7 +129,59 @@ export default class PasteQuotePlugin extends Plugin {
 		});
 	}
 
+	async citeReference(editor: Editor, view: MarkdownView) {
+		if (!view.file) {
+			return;
+		}
+
+		const fileCache = this.app.metadataCache.getFileCache(view.file);
+		const references = fileCache?.frontmatter?.references || [];
+
+		if (!references || references.length === 0) {
+			new Notice('Cite Reference failed: no references found in front matter');
+			return;
+		}
+
+		const modal = new ReferenceSuggestModal(this.app, references, (citeId) => {
+			const citation = `[@${citeId}]`;
+			const cursorPosition = editor.getCursor();
+			editor.replaceRange(citation, cursorPosition);
+			// move cursor to just before the closing bracket
+			editor.setCursor(editor.offsetToPos(editor.posToOffset(cursorPosition) + citation.length - 1));
+		});
+
+		modal.open();
+	}
+
 	onunload() {
 
 	}
 }
+
+interface SearchableReference {
+	id: string,
+	text: string,
+}
+
+class ReferenceSuggestModal extends FuzzySuggestModal<SearchableReference> {
+	private references: CslReference[];
+	private onChooseReference: (id: string) => void;
+
+	constructor(app: App, references: CslReference[], onChooseReference: (id: string) => void) {
+		super(app);
+		this.references = references;
+		this.onChooseReference = onChooseReference;
+	}
+
+	getItemText(item: SearchableReference): string {
+		return item.text;
+	}
+
+	getItems(): SearchableReference[] {
+		return this.references.map(r => ({id: r.id, text: cslReferenceSummary(r)}));
+	}
+
+	onChooseItem(item: SearchableReference, evt: MouseEvent | KeyboardEvent): void {
+		this.onChooseReference(item.id);
+	}
+}

src/quotes.ts

@@ -15,6 +15,12 @@ export interface CslReference {
   id: string,
   title?: string,
   author?: CslAuthor[],
+  editor?: CslAuthor[],
+  issued?: CslDate[],
+}
+
+export interface CslDate {
+  year?: number,
 }
 
 export function parseQuote(raw: string): Quote {
@@ -78,3 +84,12 @@ export function guessCiteId(title: string, refs: CslReference[]): string | null
   const st = searchableTitle(title);
   return refs.find((ref) => searchableTitle(ref.title || "") === st)?.id || null;
 }
+
+export function cslReferenceSummary(ref: CslReference): string {
+  let authors = [...(ref.editor || []), ...(ref.author || [])];
+  authors = authors.slice(0, 4);
+  let authorString = authors.map(a => a.family || a.given).join(' ');
+  let dateString = (ref.issued && ref.issued.length > 0 && ref.issued[0].year) ? ref.issued[0].year : '';
+  let titleString = ref.title || '';
+  return [authorString, dateString, titleString].join(' ');
+}