# username.rs - source
Source of the Rust file `src/api/v1/account/username.rs`.
Keywords: rust, rustlang, rust-lang

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    /*
    * Copyright (C) 2021  Aravinth Manivannan <realaravinth@batsense.net>
    *
    * This program is free software: you can redistribute it and/or modify
    * it under the terms of the GNU Affero 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 Affero General Public License for more details.
    *
    * You should have received a copy of the GNU Affero General Public License
    * along with this program.  If not, see <https://www.gnu.org/licenses/>.
    */
    use actix_web::{web, HttpResponse, Responder};

    use super::{AccountCheckPayload, AccountCheckResp};
    use crate::errors::*;
    use crate::AppData;

    #[my_codegen::post(path = "crate::V1_API_ROUTES.account.username_exists")]
    async fn username_exists(
        payload: web::Json<AccountCheckPayload>,
        data: AppData,
    ) -> ServiceResult<impl Responder> {
        let resp = runners::username_exists(&payload, &data).await?;
        Ok(HttpResponse::Ok().json(resp))
    }

    pub mod runners {
        use super::*;

        pub async fn username_exists(
            payload: &AccountCheckPayload,
            data: &AppData,
        ) -> ServiceResult<AccountCheckResp> {
            let res = sqlx::query!(
                "SELECT EXISTS (SELECT 1 from mcaptcha_users WHERE name = $1)",
                &payload.val,
            )
            .fetch_one(&data.db)
            .await?;

            let mut resp = AccountCheckResp { exists: false };

            if let Some(x) = res.exists {
                if x {
                    resp.exists = true;
                }
            }

            Ok(resp)
        }
    }

    pub fn services(cfg: &mut actix_web::web::ServiceConfig) {
        cfg.service(username_exists);
    }