Notes/src/public/app/widgets/quick_search.js

import BasicWidget from "./basic_widget.js";
import server from "../services/server.js";
import linkService from "../services/link.js";
import froca from "../services/froca.js";
import utils from "../services/utils.js";
import appContext from "../components/app_context.js";
import shortcutService from "../services/shortcuts.js";
import { t } from "../services/i18n.js";

const TPL = `
<div class="quick-search input-group input-group-sm">
  <style>
    .quick-search {
        padding: 10px 10px 10px 0px;
        height: 50px;
    }
    
    .quick-search button, .quick-search input {
        border: 0;
        font-size: 100% !important;
    }
  
    .quick-search .dropdown-menu {
        max-height: 600px;
        max-width: 400px;
        overflow-y: auto;
        overflow-x: hidden;
        text-overflow: ellipsis;
        box-shadow: -30px 50px 93px -50px black;
    }
  </style>
  
  <div class="input-group-prepend">
    <button class="btn btn-outline-secondary search-button" type="button" data-bs-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
        <span class="bx bx-search"></span>
    </button>
    <div class="dropdown-menu dropdown-menu-left"></div>
  </div>
  <input type="text" class="form-control form-control-sm search-string" placeholder="${t("quick-search.placeholder")}">
</div>`;

const MAX_DISPLAYED_NOTES = 15;

export default class QuickSearchWidget extends BasicWidget {
    doRender() {
        this.$widget = $(TPL);
        this.dropdown = bootstrap.Dropdown.getOrCreateInstance(this.$widget.find("[data-bs-toggle='dropdown']"));

        this.$searchString = this.$widget.find('.search-string');
        this.$dropdownMenu = this.$widget.find('.dropdown-menu');

        this.$widget.find('.input-group-prepend').on('shown.bs.dropdown', () => this.search());

        if (utils.isMobile()) {
            this.$searchString.keydown(e => {
                if (e.which === 13) {
                    if (this.$dropdownMenu.is(":visible")) {
                        this.search(); // just update already visible dropdown
                    } else {
                        this.dropdown.show();
                    }
                    e.preventDefault();
                    e.stopPropagation();
                }
            })
        }

        shortcutService.bindElShortcut(this.$searchString, 'return', () => {
            if (this.$dropdownMenu.is(":visible")) {
                this.search(); // just update already visible dropdown
            } else {
                this.dropdown.show();
            }

            this.$searchString.focus();
        });

        shortcutService.bindElShortcut(this.$searchString, 'down', () => {
            this.$dropdownMenu.find('.dropdown-item:first').focus();
        });

        shortcutService.bindElShortcut(this.$searchString, 'esc', () => {
            this.dropdown.hide();
        });

        return this.$widget;
    }

    async search() {
        const searchString = this.$searchString.val().trim();

        if (!searchString) {
            this.dropdown.hide();
            return;
        }

        this.$dropdownMenu.empty();
        this.$dropdownMenu.append(`<span class="dropdown-item disabled"><span class="bx bx-loader bx-spin"></span>${t("quick-search.searching")}</span>`);

        const { searchResultNoteIds, error } = await server.get(`quick-search/${encodeURIComponent(searchString)}`);

        if (error) {
            let tooltip = new bootstrap.Tooltip(this.$searchString, {
                trigger: 'manual',
                title: `Search error: ${error}`,
                placement: 'right'
            });

            tooltip.show();

            setTimeout(() => tooltip.dispose(), 4000);
        }

        const displayedNoteIds = searchResultNoteIds.slice(0, Math.min(MAX_DISPLAYED_NOTES, searchResultNoteIds.length));

        this.$dropdownMenu.empty();

        if (displayedNoteIds.length === 0) {
            this.$dropdownMenu.append(`<span class="dropdown-item disabled">${t("quick-search.no-results")}</span>`);
        }

        for (const note of await froca.getNotes(displayedNoteIds)) {
            const $link = await linkService.createLink(note.noteId, { showNotePath: true });
            $link.addClass('dropdown-item');
            $link.attr("tabIndex", "0");
            $link.on('click', e => {
                this.dropdown.hide();

                if (!e.target || e.target.nodeName !== 'A') {
                    // click on the link is handled by link handling, but we want the whole item clickable
                    appContext.tabManager.getActiveContext().setNote(note.noteId);
                }
            });
            shortcutService.bindElShortcut($link, 'return', () => {
                this.dropdown.hide();

                appContext.tabManager.getActiveContext().setNote(note.noteId);
            });

            this.$dropdownMenu.append($link);
        }

        if (searchResultNoteIds.length > MAX_DISPLAYED_NOTES) {
            const numRemainingResults = (searchResultNoteIds.length - MAX_DISPLAYED_NOTES);
            this.$dropdownMenu.append(`<span class="dropdown-item disabled">${t("quick-search.more-results", { number: numRemainingResults })}</span>`);
        }

        const $showInFullButton = $('<a class="dropdown-item" tabindex="0">')
            .append($(`<button class="btn btn-sm">${t("quick-search.show-in-full-search")}</button>`));

        this.$dropdownMenu.append($showInFullButton);

        $showInFullButton.on('click', () => this.showInFullSearch());

        shortcutService.bindElShortcut($showInFullButton, 'return', () => this.showInFullSearch());

        shortcutService.bindElShortcut(this.$dropdownMenu.find('.dropdown-item:first'), 'up', () => this.$searchString.focus());

        this.dropdown.update();
    }

    async showInFullSearch() {
        this.dropdown.hide();

        await appContext.triggerCommand('searchNotes', {
            searchString: this.$searchString.val()
        });
    }

    quickSearchEvent() {
        this.$searchString.focus();
    }
}