From f94cbfb2f498a121a5dbb3a22acdb74b446c952b Mon Sep 17 00:00:00 2001
From: Vendicated <vendicated@riseup.net>
Date: Thu, 1 Dec 2022 03:01:44 +0100
Subject: [PATCH] Add basic themes tab

---
 src/api/settings.ts                          |   2 +
 src/components/VencordSettings/ThemesTab.tsx | 135 +++++++++++++++++++
 src/components/VencordSettings/index.tsx     |   3 +-
 src/utils/quickCss.ts                        |  16 +++
 src/webpack/common.tsx                       |   1 +
 5 files changed, 156 insertions(+), 1 deletion(-)
 create mode 100644 src/components/VencordSettings/ThemesTab.tsx

diff --git a/src/api/settings.ts b/src/api/settings.ts
index 9e5480096..b7c143a3c 100644
--- a/src/api/settings.ts
+++ b/src/api/settings.ts
@@ -29,6 +29,7 @@ export interface Settings {
     notifyAboutUpdates: boolean;
     useQuickCss: boolean;
     enableReactDevtools: boolean;
+    themeLinks: string[];
     plugins: {
         [plugin: string]: {
             enabled: boolean;
@@ -40,6 +41,7 @@ export interface Settings {
 const DefaultSettings: Settings = {
     notifyAboutUpdates: true,
     useQuickCss: true,
+    themeLinks: [],
     enableReactDevtools: false,
     plugins: {}
 };
diff --git a/src/components/VencordSettings/ThemesTab.tsx b/src/components/VencordSettings/ThemesTab.tsx
new file mode 100644
index 000000000..60dd96d0d
--- /dev/null
+++ b/src/components/VencordSettings/ThemesTab.tsx
@@ -0,0 +1,135 @@
+/*
+ * Vencord, a modification for Discord's desktop app
+ * Copyright (c) 2022 Vendicated and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import { useSettings } from "@api/settings";
+import ErrorBoundary from "@components/ErrorBoundary";
+import { Link } from "@components/Link";
+import { useAwaiter } from "@utils/misc";
+import { findLazy } from "@webpack";
+import { Card, Forms, Margins, React, TextArea } from "@webpack/common";
+
+const TextAreaProps = findLazy(m => typeof m.textarea === "string");
+
+function Validator({ link }: { link: string; }) {
+    const [res, err, pending] = useAwaiter(() => fetch(link).then(res => {
+        if (res.status > 300) throw `${res.status} ${res.statusText}`;
+        const contentType = res.headers.get("Content-Type");
+        if (!contentType?.startsWith("text/css") && !contentType?.startsWith("text/plain"))
+            throw "Not a CSS file. Remember to use the raw link!";
+
+        return "Okay!";
+    }));
+
+    const text = pending
+        ? "Checking..."
+        : err
+            ? `Error: ${err instanceof Error ? err.message : String(err)}`
+            : "Valid!";
+
+    return <Forms.FormText style={{
+        color: pending ? "var(--text-muted)" : err ? "var(--text-danger)" : "var(--text-positive)"
+    }}>{text}</Forms.FormText>;
+}
+
+function Validators({ themeLinks }: { themeLinks: string[]; }) {
+    if (!themeLinks.length) return null;
+
+    return (
+        <>
+            <Forms.FormTitle className={Margins.marginTop20} tag="h5">Validator</Forms.FormTitle>
+            <Forms.FormText>This section will tell you whether your themes can successfully be loaded</Forms.FormText>
+            <div>
+                {themeLinks.map(link => (
+                    <Card style={{
+                        padding: ".5em",
+                        marginBottom: ".5em"
+                    }} key={link}>
+                        <Forms.FormTitle tag="h5" style={{
+                            overflowWrap: "break-word"
+                        }}>
+                            {link}
+                        </Forms.FormTitle>
+                        <Validator link={link} />
+                    </Card>
+                ))}
+            </div>
+        </>
+    );
+}
+
+export default ErrorBoundary.wrap(function () {
+    const settings = useSettings();
+    const ref = React.useRef<HTMLTextAreaElement>();
+
+    function onBlur() {
+        settings.themeLinks = [...new Set(
+            ref.current!.value
+                .trim()
+                .split(/\n+/)
+                .map(s => s.trim())
+                .filter(Boolean)
+        )];
+    }
+
+    return (
+        <>
+            <Card style={{
+                padding: "1em",
+                marginBottom: "1em",
+                marginTop: "1em"
+            }}>
+                <Forms.FormTitle tag="h5">Paste links to .css / .theme.css files here</Forms.FormTitle>
+                <Forms.FormText>One link per line</Forms.FormText>
+                <Forms.FormText>Be careful to use the raw links or github.io links!</Forms.FormText>
+                <Forms.FormDivider />
+                <Forms.FormTitle tag="h5">Find Themes:</Forms.FormTitle>
+                <div>
+                    <Link style={{ marginRight: ".5em" }} href="https://betterdiscord.app/themes">
+                        BetterDiscord Themes
+                    </Link>
+                    <Link href="https://github.com/search?q=discord+theme">Github</Link>
+                </div>
+                <Forms.FormText>If using the BD site, click on "Source" somewhere below the Download button</Forms.FormText>
+                <Forms.FormText>In the GitHub repository of your theme, find X.theme.css / X.css, click on it, then click the "Raw" button</Forms.FormText>
+                <Forms.FormText>
+                    If the theme has configuration that requires you to edit the file:
+                    <ul>
+                        <li>• Make a github account</li>
+                        <li>• Click the fork button on the top right</li>
+                        <li>• Edit the file</li>
+                        <li>• Use the link to your own repository instead</li>
+                    </ul>
+                </Forms.FormText>
+            </Card>
+            <Forms.FormTitle tag="h5">Themes</Forms.FormTitle>
+            <TextArea
+                style={{
+                    padding: ".5em",
+                    border: "1px solid var(--background-modifier-accent)"
+                }}
+                ref={ref}
+                defaultValue={settings.themeLinks.join("\n")}
+                className={TextAreaProps.textarea}
+                placeholder="Theme Links"
+                spellCheck={false}
+                onBlur={onBlur}
+            />
+            <Validators themeLinks={settings.themeLinks} />
+        </>
+    );
+});
diff --git a/src/components/VencordSettings/index.tsx b/src/components/VencordSettings/index.tsx
index 37dab8f50..b49e4b49c 100644
--- a/src/components/VencordSettings/index.tsx
+++ b/src/components/VencordSettings/index.tsx
@@ -24,6 +24,7 @@ import cssText from "~fileContent/settingsStyles.css";
 
 import BackupRestoreTab from "./BackupRestoreTab";
 import PluginsTab from "./PluginsTab";
+import ThemesTab from "./ThemesTab";
 import Updater from "./Updater";
 import VencordSettings from "./VencordTab";
 
@@ -47,7 +48,7 @@ interface SettingsTab {
 const SettingsTabs: Record<string, SettingsTab> = {
     VencordSettings: { name: "Vencord", component: () => <VencordSettings /> },
     VencordPlugins: { name: "Plugins", component: () => <PluginsTab /> },
-    VencordThemes: { name: "Themes", component: () => <Text variant="text-md/medium">Coming soon to a Vencord near you!</Text> },
+    VencordThemes: { name: "Themes", component: () => <ThemesTab /> },
     VencordUpdater: { name: "Updater" }, // Only show updater if IS_WEB is false
     VencordSettingsSync: { name: "Backup & Restore", component: () => <BackupRestoreTab /> },
 };
diff --git a/src/utils/quickCss.ts b/src/utils/quickCss.ts
index 1f9f235f5..de4eaefbc 100644
--- a/src/utils/quickCss.ts
+++ b/src/utils/quickCss.ts
@@ -21,6 +21,7 @@ import { addSettingsListener, Settings } from "@api/settings";
 import IpcEvents from "./IpcEvents";
 
 let style: HTMLStyleElement;
+let themesStyle: HTMLStyleElement;
 
 export async function toggle(isEnabled: boolean) {
     if (!style) {
@@ -35,7 +36,22 @@ export async function toggle(isEnabled: boolean) {
         style.disabled = !isEnabled;
 }
 
+async function initThemes() {
+    if (!themesStyle) {
+        themesStyle = document.createElement("style");
+        themesStyle.id = "vencord-themes";
+        document.head.appendChild(themesStyle);
+    }
+
+    const { themeLinks } = Settings;
+    const links = themeLinks.map(link => `@import url("${link.trim()}");`).join("\n");
+    themesStyle.textContent = links;
+}
+
 document.addEventListener("DOMContentLoaded", () => {
     toggle(Settings.useQuickCss);
     addSettingsListener("useQuickCss", toggle);
+
+    initThemes();
+    addSettingsListener("themeLinks", initThemes);
 });
diff --git a/src/webpack/common.tsx b/src/webpack/common.tsx
index 773cc1490..8c4357730 100644
--- a/src/webpack/common.tsx
+++ b/src/webpack/common.tsx
@@ -65,6 +65,7 @@ export let Tooltip: Components.Tooltip;
 export let Router: any;
 export let TextInput: any;
 export let Text: (props: TextProps) => JSX.Element;
+export const TextArea = findByCodeLazy("handleSetRef", "textArea") as React.ComponentType<React.PropsWithRef<any>>;
 
 export const Select = LazyComponent(() => findByCode("optionClassName", "popoutPosition", "autoFocus", "maxVisibleItems"));
 export const Slider = LazyComponent(() => findByCode("closestMarkerIndex", "stickToMarkers"));