replayweb.page/src/pages.js

"use strict";

import { LitElement, html, css, unsafeCSS } from "lit";
import { wrapCss, clickOnSpacebarPress } from "./misc";
import ndjson from "fetch-ndjson";

import { Index as FlexIndex } from "flexsearch";
import prettyBytes from "pretty-bytes";

import { getTS, getPageDateTS } from "./pageutils";

import fasSearch from "@fortawesome/fontawesome-free/svgs/solid/search.svg";
import fasAngleDown from "@fortawesome/fontawesome-free/svgs/solid/angle-down.svg";

import fasEdit from "@fortawesome/fontawesome-free/svgs/solid/edit.svg";

// ===========================================================================
class Pages extends LitElement {
  constructor() {
    super();
    this.filteredPages = [];
    this.sortedPages = [];
    this.query = "";
    this.flex = null;
    this.textPages = null;
    this.newQuery = null;
    this.loading = false;
    this.updatingSearch = false;

    this.showAllPages = false;
    this.hasExtraPages = false;

    this.currList = 0;

    this.active = false;
    this.editable = false;
    this.changeNeeded = false;

    this.selectedPages = new Set();

    this.menuActive = false;

    this.sortKey = "date";
    this.sortDesc = true;

    this.isSidebar = false;
    this.url = "";
    this.ts = "";

    this.editing = false;

    this.toDeletePages = null;
    this.toDeletePage = null;
  }

  static get sortKeys() {
    return [
      {
        key: "",
        name: "Best Match",
      },
      {
        key: "title",
        name: "Title",
      },
      {
        key: "date",
        name: "Date",
      },
    ];
  }

  static get properties() {
    return {
      active: { type: Boolean },
      collInfo: { type: Object },
      currList: { type: Number },
      filteredPages: { type: Array },
      sortedPages: { type: Array },

      showAllPages: { type: Boolean },

      query: { type: String },
      defaultKey: { type: String },

      loading: { type: Boolean },
      updatingSearch: { type: Boolean },
      editable: { type: Boolean },

      selectedPages: { type: Set },
      allSelected: { type: Boolean },

      menuActive: { type: Boolean },

      sortKey: { type: String },
      sortDesc: { type: Boolean },

      isSidebar: { type: Boolean },
      url: { type: String },
      ts: { type: String },

      editing: { type: Boolean },

      toDeletePages: { type: Object },
      toDeletePage: { type: Object },
    };
  }

  _timedUpdate() {
    if (this.newQuery !== null) {
      this.query = this.newQuery;
      this.newQuery = null;
      this.filter();
    }
  }

  async updated(changedProperties) {
    if (changedProperties.has("collInfo")) {
      this.updateTextSearch();
    } else if (changedProperties.has("query")) {
      this.filter();
    } else if (changedProperties.has("currList")) {
      this.filter();
    } else if (changedProperties.has("showAllPages")) {
      this.filter();
    }

    if (changedProperties.has("active") && this.active) {
      if (this.changeNeeded) {
        this.filter();
      }
    }

    if (changedProperties.has("query")) {
      if (this.query) {
        this.sortKey = "";
        this.sortDesc = false;
      } else {
        this.sortKey = "date";
        this.sortDesc = true;
      }
      const sorter = this.renderRoot.querySelector("wr-sorter");
      if (sorter) {
        sorter.sortKey = this.sortKey;
        sorter.sortDesc = this.sortDesc;
      }
    }

    if (changedProperties.has("sortedPages") && this.isSidebar) {
      //if (await this.updateComplete) {
      const selected = this.renderRoot.querySelector(".current");
      if (selected) {
        const opts = {
          behavior: "smooth",
          block: "nearest",
          inline: "nearest",
        };
        setTimeout(() => selected.scrollIntoView(opts), 100);
      }
      //}
    }
  }

  onChangeQuery(event) {
    this.newQuery = event.currentTarget.value;
    //this.loading = true;
    if (this._ival) {
      window.clearTimeout(this._ival);
    }
    this._ival = window.setTimeout(() => this._timedUpdate(), 250);
  }

  async filter() {
    if (this.loading) {
      return;
    }
    if (!this.active) {
      this.changeNeeded = true;
    }
    this.loading = true;
    if (this.flex && this.query && this.textPages) {
      const results = await this.flex.searchAsync(this.query, 25);
      this.filteredPages = results.map((inx) => this.textPages[inx]);
    } else if (this.showAllPages && this.hasExtraPages) {
      this.filteredPages = [...this.textPages];
    } else {
      this.filteredPages = [...this.collInfo.pages];
    }

    if (this.currList !== 0) {
      await this.filterCurated();
    }

    // normalize the date
    for (const page of this.filteredPages) {
      const { timestamp, date } = getPageDateTS(page);
      page.timestamp = timestamp;
      page.date = date;
    }

    this.loading = false;
    this.changeNeeded = false;
    const data = { query: this.query, currList: this.currList };
    this.sendChangeEvent(data);
  }

  async filterCurated() {
    const resp = await fetch(
      `${this.collInfo.apiPrefix}/curated/${this.currList}`,
    );
    const json = await resp.json();

    const curated = json.curated;

    this.filteredPages = curated;
  }

  sendChangeEvent(data) {
    this.dispatchEvent(new CustomEvent("coll-tab-nav", { detail: { data } }));
  }

  addPages(pages) {
    const flex = new FlexIndex();

    this.flex = flex;
    this.textPages = pages;

    this.hasExtraPages =
      this.textPages &&
      this.collInfo &&
      this.collInfo.pages &&
      this.textPages.length > this.collInfo.pages.length;

    return Promise.all(
      pages.map((page, index) => {
        let text = page.url;
        if (page.title) {
          text += " " + page.title;
        }
        if (page.text) {
          text += " " + page.text;
        }
        return flex.addAsync(index, text);
      }),
    );
  }

  async updateTextSearch() {
    if (this.updatingSearch) {
      return;
    }

    this.updatingSearch = true;
    let count = 0;

    try {
      const cache = await caches.open("cache:" + this.collInfo.coll);

      const indexUrl = `${this.collInfo.apiPrefix}/textIndex`;

      let resp = await cache.match(indexUrl);

      if (!resp || !Number(resp.headers.get("Content-Length"))) {
        resp = await fetch(indexUrl);
        if (resp.status === 200 && Number(resp.headers.get("Content-Length"))) {
          cache.put(indexUrl, resp.clone());
        }
      }

      const lines = [];

      for await (const line of ndjson(resp.body.getReader())) {
        if (!line.url) {
          continue;
        }

        line.id = ++count;
        lines.push(line);
      }

      await this.addPages(lines);
    } catch (e) {
      console.warn(e);
    } finally {
      if (count === 0) {
        await this.addPages(this.collInfo.pages);
      }

      this.updatingSearch = false;
    }

    await this.filter();
  }

  static get styles() {
    return wrapCss(css`
      :host {
        width: 100%;
        height: 100%;
        display: flex;
        min-width: 0px;
        flex-direction: column;
        box-sizing: border-box !important;
      }

      div[role="main"],
      #contents div[role="complementary"] {
        height: 100%;
      }

      .main.columns {
        width: 100%;
        justify-self: stretch;
        min-height: 0px;
        margin: 0px;
      }

      .header.columns {
        width: 100%;
        margin-bottom: 0px;
      }
      .header a {
        color: black;
      }

      .header .column.pagetitle {
        margin-left: 2.5em;
      }

      .column.main-content {
        min-height: 0px;
        display: flex;
        flex-direction: column;
        padding: 0px;
        margin-top: 0.5em;
        margin-left: 0.75em;
      }

      .index-bar {
        display: flex;
        flex-direction: column;
        border-right: 3px solid rgb(237, 237, 237);
        background-color: whitesmoke;
        padding-right: 0px;
        position: relative;
      }

      .index-bar-title {
        font-size: 1.25rem;
        text-transform: uppercase;
        margin-bottom: 1rem;
        word-break: break-word;
      }

      .index-bar-title:hover + .editIcon {
        display: block;
      }

      .editIcon {
        display: none;
        position: absolute;
        right: 8px;
        top: 8px;
      }

      .index-bar-status {
        display: flex;
        flex-direction: row;
        margin-bottom: 0.5rem;
        padding-right: 0.75em;
      }

      .index-bar-menu {
        margin-top: 1rem;
      }

      #filter-label {
        margin-bottom: 0px;
      }

      .num-results {
        font-style: italic;
        font-weight: normal;
        line-height: 2.5;
      }

      .asc:after {
        content: "▼";
        font-size: 0.75em;
      }
      .desc:after {
        content: "▲";
        font-size: 0.75em;
      }

      @media screen and (min-width: 769px) {
        .main.columns {
          max-height: 100%;
          height: 100%;
        }
        .index-bar-menu {
          max-height: 100%;
          overflow-y: auto;
        }
      }

      @media screen and (max-width: 768px) {
        ${Pages.sidebarStyles()}
      }

      ${Pages.sidebarStyles(unsafeCSS`:host(.sidebar)`)}

      .mobile-lists {
        display: block !important;
      }

      :host(.sidebar) .columns.is-hidden-mobile,
      :host(.sidebar) .is-hidden-mobile {
        display: none !important;
      }

      :host(.sidebar) .mobile-header {
        display: flex !important;
      }

      :host(.sidebar) .columns {
        display: flex !important;
      }

      .scroller {
        overflow-y: auto;
        overflow-x: hidden;
        display: flex;
        flex-direction: column;
        flex: auto;

        padding-bottom: 1em;
        min-height: 0px;
      }

      .page-entry {
        padding-bottom: 1.5rem;
      }

      .selected {
        background-color: rgb(207, 243, 255);
      }

      .is-disabled {
        pointer-events: none;
        opacity: 0.65;
      }

      .page-header {
        display: flex;
        flex-direction: row;
        align-items: baseline;
        width: 100%;
        min-height: fit-content;

        margin-bottom: 1em;
        border-bottom: 3px solid rgb(237, 237, 237);
      }

      .check-select {
        padding: 0 1em 0 0.5em;
      }

      .search-bar {
        width: auto;
        display: flex;
        flex-direction: column;
      }
      .flex-auto {
        flex: auto;
      }
    `);
  }

  static sidebarStyles(prefix = css``) {
    return css`
      ${prefix} .main.columns {
        position: relative;
        max-height: 100%;
        height: 100%;
      }

      ${prefix} .index-bar-menu {
        max-height: 75px;
        overflow-y: auto;
        margin-top: 0.75em;
      }

      ${prefix} .column.main-content {
        position: relative;
        overflow-y: auto;

        width: 100%;
        min-height: 0px;
        height: 100%;
        padding: 0px;
        margin: 0px;
      }

      ${prefix} .mobile-header {
        margin: 0.5rem;
        margin-left: 1rem;
        align-items: center;
        display: flex;
        justify-content: space-between;
        flex-flow: row wrap;
        min-height: 24px;
        width: 100%;
      }

      ${prefix} .menu {
        font-size: 0.8rem;
      }
    `;
  }

  onSelectList(event) {
    event.preventDefault();
    this.currList = Number(event.currentTarget.getAttribute("data-list"));
  }

  onSelectListDrop(event) {
    event.preventDefault();
    this.currList = Number(event.currentTarget.value);
  }

  render() {
    const currList = this.currList;

    return html`
      <div
        class="is-sr-only"
        role="heading"
        aria-level="${this.isSidebar ? "2" : "1"}"
      >
        Pages in ${this.collInfo.title}
      </div>
      <div class="search-bar notification is-marginless">
        ${this.isSidebar
          ? html`<h3 class="is-sr-only">Search and Filter Pages</h3>`
          : ""}
        <div class="field flex-auto">
          <div
            class="control has-icons-left ${this.loading ? "is-loading" : ""}"
          >
            <input
              class="input"
              @input="${this.onChangeQuery}"
              .value="${this.query}"
              type="text"
              placeholder="Search by Page URL, Title or Text"
            />
            <span class="icon is-left"
              ><fa-icon .svg="${fasSearch}" aria-hidden="true"></fa-icon
            ></span>
          </div>
        </div>
      </div>
      <div class="main columns">
        <div
          class="column index-bar is-one-fifth ${this.isSidebar
            ? "is-hidden-mobile"
            : ""}"
        >
          ${this.editable && this.editing
            ? html`
                <form @submit="${this.onUpdateTitle}">
                  <input
                    id="titleEdit"
                    class="input"
                    value="${this.collInfo.title}"
                    @blur="${this.onUpdateTitle}"
                  />
                </form>
              `
            : html` <div
                class="index-bar-title"
                @dblclick="${() => (this.editing = true)}"
              >
                ${this.collInfo.title}
              </div>`}
          ${this.editable
            ? html`<fa-icon class="editIcon" .svg="${fasEdit}"></fa-icon>`
            : html``}
          ${this.hasExtraPages
            ? html` <span class="check-select">
                <label class="checkbox">
                  <input
                    @change=${(e) =>
                      (this.showAllPages = e.currentTarget.checked)}
                    type="checkbox"
                    .checked="${this.showAllPages}"
                  />
                  Show Non-Seed Pages
                </label>
              </span>`
            : ""}

          <span
            class="num-results is-hidden-mobile"
            aria-live="polite"
            aria-atomic="true"
            >${this.formatResults()}</span
          >

          ${this.editable
            ? html` <div class="index-bar-actions">
                ${this.renderDownloadMenu()}
              </div>`
            : ""}
          ${this.collInfo.lists.length
            ? html`
                <p id="filter-label" class="menu-label">Filter By List:</p>
                <div class="index-bar-menu menu">
                  <ul class="menu-list">
                    <li>
                      <a
                        href="#list-0"
                        data-list="0"
                        class="${currList === 0 ? "is-active" : ""}"
                        @click=${this.onSelectList}
                        ><i>All Pages</i></a
                      >
                    </li>
                    ${this.collInfo.lists.map(
                      (list) =>
                        html` <li>
                          <a
                            @click=${this.onSelectList}
                            href="#list-${list.id}"
                            data-list="${list.id}"
                            class="${currList === list.id ? "is-active" : ""}"
                            >${list.title}</a
                          >
                        </li>`,
                    )}
                  </ul>
                </div>
              `
            : ""}
        </div>
        <div class="column main-content">
          <div
            class="is-sr-only"
            role="heading"
            aria-level="${this.isSidebar ? "3" : "2"}"
          >
            Page List
          </div>
          ${this.renderPages()}
        </div>
      </div>
      ${this.renderDeleteModal()}
    `;
  }

  renderDownloadMenu() {
    return html` <div class="dropdown ${this.menuActive ? "is-active" : ""}">
      <div class="dropdown-trigger">
        <button
          @click="${this.onMenu}"
          class="button is-small"
          aria-haspopup="true"
          aria-expanded="${this.menuActive}"
          aria-controls="dropdown-menu"
        >
          <span>Download</span>
          <span class="icon is-small">
            <fa-icon .svg="${fasAngleDown}" aria-hidden="true"></fa-icon>
          </span>
        </button>
      </div>
      <div class="dropdown-menu" id="dropdown-menu">
        <div class="dropdown-content">
          <a
            role="button"
            href="#"
            @click="${(e) => this.onDownload(e, "wacz")}"
            @keyup="${clickOnSpacebarPress}"
            class="dropdown-item"
          >
            Download ${this.selectedPages.size === 0 ? "All" : "Selected"} as
            WACZ (Web Archive Collection Zip)
          </a>
          <a
            role="button"
            href="#"
            @click="${(e) => this.onDownload(e, "warc")}"
            @keyup="${clickOnSpacebarPress}"
            class="dropdown-item"
          >
            Download ${this.selectedPages.size === 0 ? "All" : "Selected"} as
            WARC 1.1 Only
          </a>
          <a
            role="button"
            href="#"
            @click="${(e) => this.onDownload(e, "warc1.0")}"
            @keyup="${clickOnSpacebarPress}"
            class="dropdown-item"
          >
            Download ${this.selectedPages.size === 0 ? "All" : "Selected"} as
            WARC 1.0 Only
          </a>
        </div>
      </div>
    </div>`;
  }

  renderPageHeader() {
    return html`
      ${!this.isSidebar && this.editable && this.filteredPages.length
        ? html` <div class="check-select">
            <label class="checkbox">
              <input
                @change=${this.onSelectAll}
                type="checkbox"
                .checked="${this.allSelected}"
              />
            </label>
          </div>`
        : html``}

      <div class="header columns is-hidden-mobile">
        ${this.query
          ? html` <a
              role="button"
              href="#"
              @click="${this.onSort}"
              @keyup="${clickOnSpacebarPress}"
              data-key=""
              class="column is-1 ${this.sortKey === ""
                ? this.sortDesc
                  ? "desc"
                  : "asc"
                : ""}"
              >Match</a
            >`
          : ""}

        <a
          role="button"
          href="#"
          @click="${this.onSort}"
          @keyup="${clickOnSpacebarPress}"
          data-key="date"
          class="column is-2 ${this.sortKey === "date"
            ? this.sortDesc
              ? "desc"
              : "asc"
            : ""}"
          >Date</a
        >
        <a
          role="button"
          href="#"
          @click="${this.onSort}"
          @keyup="${clickOnSpacebarPress}"
          data-key="title"
          class="column is-6 pagetitle ${this.sortKey === "title"
            ? this.sortDesc
              ? "desc"
              : "asc"
            : ""}"
          >Page Title</a
        >
      </div>

      <div class="is-hidden-tablet mobile-header">
        <div class="num-results" aria-live="polite" aria-atomic="true">
          ${this.formatResults()}
        </div>
        <wr-sorter
          id="pages"
          .sortKey="${this.sortKey}"
          .sortDesc="${this.sortDesc}"
          .sortKeys="${Pages.sortKeys}"
          .data="${this.filteredPages}"
          pageResults="100"
          @sort-changed="${this.onSortChanged}"
          class="${this.filteredPages.length ? "" : "is-hidden"}"
        >
        </wr-sorter>
      </div>
    `;
  }

  renderDeleteModal() {
    if (!this.toDeletePages) {
      return html``;
    }

    return html` <wr-modal
      bgClass="has-background-grey-lighter"
      @modal-closed="${() => (this.toDeletePages = this.toDeletePage = null)}"
      title="Confirm Delete"
    >
      ${this.toDeletePage
        ? html` <p>
            Are you sure you want to delete the page
            <b>${this.toDeletePage.title}</b>? (Size:
            <b>${prettyBytes(this.toDeletePage.size)}</b>)
          </p>`
        : html`
            <p>
              Are you sure you want to delete the
              <b>${this.toDeletePages.size}</b> selected pages?
            </p>
          `}
      <p>This operation can not be undone.</p>

      <button @click="${this.onDeletePages}" class="button is-danger">
        Delete
      </button>
      <button
        @click="${() => (this.toDeletePages = this.toDeletePage = null)}"
        class="button"
      >
        Cancel
      </button>
    </wr-modal>`;
  }

  isCurrPage(page) {
    if (this.isSidebar) {
      if (page.url === this.url) {
        let ts = page.timestamp;
        if (!ts && page.date) {
          ts = getTS(page.date);
        } else if (typeof page.ts === "string") {
          ts = getTS(page.ts);
        }
        return ts === this.ts;
      }
    }

    return false;
  }

  renderPages() {
    //const name = this.currList === 0 ? "All Pages" : this.collInfo.lists[this.currList - 1].title;
    return html`
      <div class="page-header has-text-weight-bold">
        ${this.renderPageHeader()}
      </div>
      <ul class="scroller" @scroll="${this.onScroll}">
        ${this.sortedPages.length
          ? html` ${this.sortedPages.map((p, i) => {
              const selected = this.selectedPages.has(p.id);

              return html` <li class="page-entry ${selected ? "selected" : ""}">
                <wr-page-entry
                  .index="${this.query || this.isSidebar ? i + 1 : 0}"
                  .editable="${this.editable}"
                  .selected="${selected}"
                  .isCurrent="${this.isCurrPage(p)}"
                  .isSidebar="${this.isSidebar}"
                  .page="${p}"
                  pid="${p.id}"
                  @sel-page="${this.onSelectToggle}"
                  @delete-page="${this.onDeleteConfirm}"
                  replayPrefix="${this.collInfo.replayPrefix}"
                  query="${this.query}"
                  class="${this.isSidebar ? "sidebar" : ""}"
                >
                </wr-page-entry>
              </li>`;
            })}`
          : html`<p class="mobile-header">${this.getNoResultsMessage()}</p>`}
      </ul>
    `;
  }

  onUpdateTitle(event) {
    event.preventDefault();

    this.editing = false;

    if (!this.editable) {
      return;
    }
    const input = this.renderRoot.querySelector("#titleEdit");
    if (!input || !input.value.trim()) {
      return;
    }

    const title = input.value;

    const body = JSON.stringify({ title });

    fetch(`${this.collInfo.apiPrefix}/metadata`, { method: "POST", body }).then(
      (res) => {
        if (res.status === 200) {
          this.dispatchEvent(
            new CustomEvent("coll-update", { detail: { title } }),
          );
        }
      },
    );
  }

  onMenu(event) {
    event.stopPropagation();
    this.menuActive = !this.menuActive;

    if (this.menuActive) {
      document.addEventListener(
        "click",
        () => {
          this.menuActive = false;
        },
        { once: true },
      );
    }
  }

  onSort(event) {
    event.preventDefault();

    const key = event.currentTarget.getAttribute("data-key") || "";
    if (key === this.sortKey) {
      this.sortDesc = !this.sortDesc;
    } else {
      this.sortDesc = false;
      this.sortKey = key;
    }
  }

  onSortChanged(event) {
    this.sortedPages = event.detail.sortedData;
    this.sortKey = event.detail.sortKey;
    this.sortDesc = event.detail.sortDesc;
  }

  onSelectToggle(event) {
    const { page, selected } = event.detail;
    if (selected) {
      this.selectedPages.add(page);
    } else {
      this.selectedPages.delete(page);
    }
    this.allSelected = this.selectedPages.size === this.sortedPages.length;
    this.requestUpdate();
  }

  onSelectAll(event) {
    this.allSelected = event.currentTarget.checked;
    if (!this.allSelected) {
      this.selectedPages.clear();
    } else {
      //this.selectedPages = new Set();
      this.sortedPages.forEach((p) => {
        this.selectedPages.add(p.id);
      });
    }
    //this.allSelected = (this.selectedPages.size === this.sortedPages.length);
    this.requestUpdate();
  }

  async onDownload(event, format) {
    event.preventDefault();

    const selected = this.selectedPages.size > 0;

    const params = new URLSearchParams();
    params.set(
      "pages",
      selected ? Array.from(this.selectedPages.keys()).join(",") : "all",
    );
    params.set("format", format);
    if (this.collInfo.filename) {
      params.set("filename", this.collInfo.filename);
    }

    window.location.href = `${this.collInfo.apiPrefix}/dl?` + params.toString();
  }

  onDeleteConfirm(event) {
    const page = event.currentTarget.page;
    // if page is one of the selected, delete entire selection
    if (this.selectedPages.has(page.id)) {
      this.toDeletePages = this.selectedPages;
      this.toDeletePage = null;
    } else {
      // else, delete just the page
      this.toDeletePages = [page.id];
      this.toDeletePage = page;
    }
  }

  async onDeletePages() {
    const pageMap = {};

    for (const id of this.toDeletePages) {
      const p = this.renderRoot.querySelector(`wr-page-entry[pid="${id}"]`);
      if (p) {
        p.deleting = true;
        pageMap[id] = p;
      }
    }

    for (const id of this.toDeletePages) {
      const resp = await fetch(`${this.collInfo.apiPrefix}/page/${id}`, {
        method: "DELETE",
      });
      const json = await resp.json();

      if (json.error) {
        console.warn(json.error);
        continue;
      }

      const page = pageMap[id];

      if (!page) {
        continue;
      }

      const inx = this.collInfo.pages.indexOf(page);
      if (inx < 0) {
        continue;
      }

      this.collInfo.pages.splice(inx, 1);
    }

    this.toDeletePages = null;
    this.toDeletePage = null;

    this.updateTextSearch();
    this.requestUpdate();
  }

  formatResults() {
    // Default behavior: Count all available pages
    if (!this.query) {
      const length = this.filteredPages.length;
      if (length === this.sortedPages.length) {
        return `${length} Page${length !== 1 ? "s" : ""}`;
      } else {
        return `${this.sortedPages.length} of ${length} Pages Shown`;
      }
    }

    // ... unless they were filtered
    if (this.sortedPages.length === 1) {
      return "1 Page";
    } else {
      return `${this.sortedPages.length} Pages`;
    }
  }

  getNoResultsMessage() {
    if (!this.collInfo || !this.collInfo.pages.length) {
      return html`<span class="fix-text-wrapping"
        >No Pages are defined in this archive. The archive may be empty.
        <a href="#view=resources">Try browsing by URL</a>.</span
      >`;
    }

    if (this.updatingSearch) {
      return "Initializing Search...";
    }

    if (this.loading) {
      return "Searching...";
    }

    if (this.query) {
      return html`<span class="fix-text-wrapping"
        >No matching pages found. Try changing the search query, or
        <a href="#view=resources">browse by URL</a>.</span
      >`;
    }

    return "No Pages Found";
  }

  onScroll(event) {
    const element = event.currentTarget;
    const diff =
      element.scrollHeight - element.scrollTop - element.clientHeight;
    if (diff < 40) {
      const sorter = this.renderRoot.querySelector("wr-sorter");
      if (sorter) {
        sorter.getMore();
      }
    }
  }
}

customElements.define("wr-page-view", Pages);

export { Pages };