Support Zotero PDF URI links

src/main.ts

@@ -21,6 +21,7 @@ import {
   InsertCitationModal,
   InsertNoteLinkModal,
   InsertNoteContentModal,
+  InsertZoteroLinkModal,
   OpenNoteModal,
 } from './modals';
 import { VaultExt } from './obsidian-extensions.d';
@@ -171,6 +172,15 @@ export default class CitationPlugin extends Plugin {
       },
     });
 
+    this.addCommand({
+      id: 'insert-zotero-link',
+      name: 'Insert Zotero link to pdf or entry',
+      callback: () => {
+        const modal = new InsertZoteroLinkModal(this.app, this);
+        modal.open();
+      },
+    });
+
     this.addCommand({
       id: 'insert-markdown-citation',
       name: 'Insert Markdown citation',
@@ -334,6 +344,16 @@ export default class CitationPlugin extends Plugin {
     );
   }
 
+  getEntryZoteroLinkForCitekey(citekey: string): string {
+    return `[${citekey}](zotero://select/items/${citekey})`;
+  }
+
+  getPdfZoteroLinkForCitekey(citekey: string): string {
+    const variables = this.library.getTemplateVariablesForCitekey(citekey);
+    return `[${citekey}:pdf](${variables.zoteroPdfURI})`;
+  }
+
+
   /**
    * Run a case-insensitive search for the literature note file corresponding to
    * the given citekey. If no corresponding file is found, create one.
@@ -417,4 +437,16 @@ export default class CitationPlugin extends Plugin {
 
     this.editor.replaceRange(citation, this.editor.getCursor());
   }
+
+  async insertZoteroLink(
+    citekey: string,
+    alternative = false,
+  ): Promise<void> {
+    const func = alternative
+      ? this.getEntryZoteroLinkForCitekey
+      : this.getPdfZoteroLinkForCitekey;
+    const link = func.bind(this)(citekey);
+
+    this.editor.replaceRange(link, this.editor.getCursor());
+  }
 }

src/modals.ts

@@ -258,6 +258,30 @@ export class InsertNoteContentModal extends SearchModal {
   }
 }
 
+export class InsertZoteroLinkModal extends SearchModal {
+  constructor(app: App, plugin: CitationPlugin) {
+    super(app, plugin);
+
+    this.setInstructions([
+      { command: '↑↓', purpose: 'to navigate' },
+      {
+        command: '↵',
+        purpose: 'to insert Zotero Link to pdf',
+      },
+      { command: 'shift ↵', purpose: 'to insert Zoter Link to entry' },
+      { command: 'esc', purpose: 'to dismiss' },
+    ]);
+  }
+
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  onChooseItem(item: Entry, evt: MouseEvent | KeyboardEvent): void {
+    const isAlternative = evt instanceof KeyboardEvent && evt.shiftKey;
+    this.plugin
+      .insertZoteroLink(item.id, isAlternative)
+      .catch(console.error);
+  }
+}
+
 export class InsertCitationModal extends SearchModal {
   constructor(app: App, plugin: CitationPlugin) {
     super(app, plugin);

src/types.ts

@@ -1,5 +1,6 @@
 import * as BibTeXParser from '@retorquere/bibtex-parser';
 import { Entry as EntryDataBibLaTeX } from '@retorquere/bibtex-parser';
+import { has } from 'lodash';
 // Also make EntryDataBibLaTeX available to other modules
 export { Entry as EntryDataBibLaTeX } from '@retorquere/bibtex-parser';
 
@@ -31,6 +32,8 @@ export const TEMPLATE_VARIABLES = {
   URL: '',
   year: 'Publication year',
   zoteroSelectURI: 'URI to open the reference in Zotero',
+  zoteroPdfURI: 'URI to open the PDF attachment in Zotero',
+  zoteroPdfHash: 'Hash of the PDF attachment',
 };
 
 export class Library {
@@ -65,6 +68,8 @@ export class Library {
       URL: entry.URL,
       year: entry.year?.toString(),
       zoteroSelectURI: entry.zoteroSelectURI,
+      zoteroPdfURI: entry.zoteroPdfURI,
+      zoteroPdfHash: entry.zoteroPdfHash,
     };
 
     return { entry: entry.toJSON(), ...shortcuts };
@@ -199,6 +204,28 @@ export abstract class Entry {
     return `zotero://select/items/@${this.id}`;
   }
 
+  public get zoteroPdfHash(): string {
+    const files = this.files || [];
+
+    const pdfPath = files.find((f) => f.toLowerCase().endsWith('.pdf'));
+
+    if (!pdfPath) {
+      return null;
+    }
+    const idxStorage = pdfPath.toLowerCase().indexOf('/storage/');
+    const pdfHash = pdfPath.substring(idxStorage + 9, idxStorage + 9 + 8);
+    return pdfHash;
+  }
+
+  public get zoteroPdfURI(): string {
+    const hashPdf = this.zoteroPdfHash;
+    if (hashPdf) {
+      return `zotero://open-pdf/library/items/${hashPdf}`;
+    } else {
+      return null;
+    }
+  }
+
   toJSON(): Record<string, unknown> {
     const jsonObj: Record<string, unknown> = Object.assign({}, this);