OpenFrontIO/src/client/FlagInput.ts

import { LitElement, css, html } from "lit";
import { customElement, state } from "lit/decorators.js";
import Countries from "./data/countries.json";
const flagKey: string = "flag";

@customElement("flag-input")
export class FlagInput extends LitElement {
  @state() private flag: string = "";
  @state() private search: string = "";
  @state() private showModal: boolean = false;

  static styles = css`
    @media (max-width: 768px) {
      .flag-modal {
        width: 80vw;
      }

      .dropdown-item {
        width: calc(100% / 3 - 15px);
      }
    }
  `;

  private handleSearch(e: Event) {
    this.search = String((e.target as HTMLInputElement).value);
  }

  private setFlag(flag: string) {
    if (flag == "xx") {
      flag = "";
    }
    this.flag = flag;
    this.showModal = false;
    this.storeFlag(flag);
  }

  public getCurrentFlag(): string {
    return this.flag;
  }

  private getStoredFlag(): string {
    const storedFlag = localStorage.getItem(flagKey);
    if (storedFlag) {
      return storedFlag;
    }
    return "";
  }

  private storeFlag(flag: string) {
    if (flag) {
      localStorage.setItem(flagKey, flag);
    } else if (flag === "") {
      localStorage.removeItem(flagKey);
    }
  }

  private dispatchFlagEvent() {
    this.dispatchEvent(
      new CustomEvent("flag-change", {
        detail: { flag: this.flag },
        bubbles: true,
        composed: true,
      }),
    );
  }

  connectedCallback() {
    super.connectedCallback();
    this.flag = this.getStoredFlag();
    this.dispatchFlagEvent();
  }

  createRenderRoot() {
    return this;
  }

  render() {
    return html`
      <div
        class="absolute left-0 top-0 w-full h-full ${this.showModal
          ? ""
          : "hidden"}"
        @click=${() => (this.showModal = false)}
      ></div>
      <div class="flex relative">
        <button
          @click=${() => (this.showModal = !this.showModal)}
          class="border p-[4px] rounded-lg flex cursor-pointer border-black/30 dark:border-gray-300/60 bg-white/70 dark:bg-[rgba(55,65,81,0.7)]"
          title="Pick a flag!"
        >
          <img class="size-[48px]" src="/flags/${this.flag || "xx"}.svg" />
        </button>
        ${this.showModal
          ? html`
              <div
                class="text-white flex flex-col gap-[0.5rem] absolute top-[60px] left-[0px] w-[780%] h-[500px] max-h-[50vh] max-w-[87vw] bg-gray-900/80 backdrop-blur-md p-[10px] rounded-[8px] z-[3] ${this
                  .showModal
                  ? ""
                  : "hidden"}"
              >
                <input
                  class="h-[2rem] border-none text-center border border-gray-300 rounded-xl shadow-sm text-2xl text-center focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500 text-black dark:border-gray-300/60 dark:bg-gray-700 dark:text-white"
                  type="text"
                  placeholder="Search..."
                  @change=${this.handleSearch}
                  @keyup=${this.handleSearch}
                />
                <div
                  class="flex flex-wrap justify-evenly gap-[1rem] overflow-y-auto overflow-x-hidden"
                >
                  ${Countries.filter(
                    (country) =>
                      country.name
                        .toLowerCase()
                        .includes(this.search.toLowerCase()) ||
                      country.code
                        .toLowerCase()
                        .includes(this.search.toLowerCase()),
                  ).map(
                    (country) => html`
                      <button
                        @click=${() => this.setFlag(country.code)}
                        class="text-center cursor-pointer border-none bg-none opacity-70 sm:w-[calc(33.3333%-15px) w-[calc(100%/3-15px)] md:w-[calc(100%/4-15px)]"
                      >
                        <img
                          class="country-flag w-full h-auto"
                          src="/flags/${country.code}.svg"
                        />
                        <span class="country-name">${country.name}</span>
                      </button>
                    `,
                  )}
                </div>
              </div>
            `
          : ""}
      </div>
    `;
  }
}