Add google command to google things for other people

Signed-off-by: shedaniel <daniel@shedaniel.me>

src/main/kotlin/me/shedaniel/linkie/discord/LinkieBot.kt

@@ -168,4 +168,5 @@ fun registerCommands(commands: CommandHandler) {
     commands.registerCommand(TricksCommand, "trick")
     commands.registerCommand(ValueCommand, "value")
     commands.registerCommand(FabricCommand, "fabric")
+    commands.registerCommand(GoogleCommand, "google")
 }

src/main/kotlin/me/shedaniel/linkie/discord/commands/GoogleCommand.kt

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2019, 2020 shedaniel
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package me.shedaniel.linkie.discord.commands
+
+import discord4j.core.`object`.entity.User
+import discord4j.core.`object`.entity.channel.MessageChannel
+import discord4j.core.event.domain.message.MessageCreateEvent
+import me.shedaniel.linkie.discord.CommandBase
+import me.shedaniel.linkie.discord.MessageCreator
+import me.shedaniel.linkie.discord.validateNotEmpty
+import java.net.URLEncoder
+
+object GoogleCommand : CommandBase {
+    override suspend fun execute(event: MessageCreateEvent, message: MessageCreator, prefix: String, user: User, cmd: String, args: MutableList<String>, channel: MessageChannel) {
+        args.validateNotEmpty(prefix, "$cmd <query>")
+        message.send("https://letmegooglethat.com/?q=" + args.joinToString(" ").escapeHTML()).subscribe()
+    }
+
+    private fun String.escapeHTML(): String {
+        return URLEncoder.encode(this, "UTF-8")
+    }
+}