Changed return types to results

web/src/lib.rs

@@ -146,7 +146,7 @@ pub async fn initialize(
                 routes::dashboard::guild::get_reminder_templates,
                 routes::dashboard::guild::create_reminder_template,
                 routes::dashboard::guild::delete_reminder_template,
-                routes::dashboard::guild::create_reminder,
+                routes::dashboard::guild::create_guild_reminder,
                 routes::dashboard::guild::get_reminders,
                 routes::dashboard::guild::edit_reminder,
                 routes::dashboard::guild::delete_reminder,

web/src/macros.rs

@@ -1,7 +1,7 @@
 macro_rules! check_length {
     ($max:ident, $field:expr) => {
         if $field.len() > $max {
-            return json!({ "error": format!("{} exceeded", stringify!($max)) });
+            return Err(json!({ "error": format!("{} exceeded", stringify!($max)) }));
         }
     };
     ($max:ident, $field:expr, $($fields:expr),+) => {
@@ -25,7 +25,7 @@ macro_rules! check_length_opt {
 macro_rules! check_url {
     ($field:expr) => {
         if !($field.starts_with("http://") || $field.starts_with("https://")) {
-            return json!({ "error": "URL invalid" });
+            return Err(json!({ "error": "URL invalid" }));
         }
     };
     ($field:expr, $($fields:expr),+) => {
@@ -60,7 +60,7 @@ macro_rules! check_authorization {
 
                         match member {
                             Err(_) => {
-                                return json!({"error": "User not in guild"})
+                                return Err(json!({"error": "User not in guild"}));
                             }
 
                             Ok(_) => {}
@@ -68,13 +68,13 @@ macro_rules! check_authorization {
                     }
 
                     None => {
-                        return json!({"error": "Bot not in guild"})
+                        return Err(json!({"error": "Bot not in guild"}));
                     }
                 }
             }
 
             None => {
-                return json!({"error": "User not authorized"});
+                return Err(json!({"error": "User not authorized"}));
             }
         }
     }
@@ -117,3 +117,9 @@ macro_rules! update_field {
         update_field!($pool, $error, $reminder.[$($fields),+]);
     };
 }
+
+macro_rules! json_err {
+    ($message:expr) => {
+        Err(json!({ "error": $message }))
+    };
+}

web/src/routes/dashboard/export.rs

@@ -1,7 +1,7 @@
 use csv::{QuoteStyle, WriterBuilder};
 use rocket::{
     http::CookieJar,
-    serde::json::{json, Json, Value as JsonValue},
+    serde::json::{json, serde_json, Json},
     State,
 };
 use serenity::{
@@ -10,7 +10,10 @@ use serenity::{
 };
 use sqlx::{MySql, Pool};
 
-use crate::routes::dashboard::{ImportBody, ReminderCsv, ReminderTemplateCsv, TodoCsv};
+use crate::routes::dashboard::{
+    create_reminder, generate_uid, ImportBody, JsonResult, Reminder, ReminderCsv,
+    ReminderTemplateCsv, TodoCsv,
+};
 
 #[get("/api/guild/<id>/export/reminders")]
 pub async fn export_reminders(
@@ -18,7 +21,7 @@ pub async fn export_reminders(
     cookies: &CookieJar<'_>,
     ctx: &State<Context>,
     pool: &State<Pool<MySql>>,
-) -> JsonValue {
+) -> JsonResult {
     check_authorization!(cookies, ctx.inner(), id);
 
     let mut csv_writer = WriterBuilder::new().quote_style(QuoteStyle::Always).from_writer(vec![]);
@@ -40,7 +43,7 @@ pub async fn export_reminders(
                  reminders.attachment,
                  reminders.attachment_name,
                  reminders.avatar,
-                 channels.channel,
+                 CONCAT('#', channels.channel) AS channel,
                  reminders.content,
                  reminders.embed_author,
                  reminders.embed_author_url,
@@ -77,21 +80,19 @@ pub async fn export_reminders(
 
                     match csv_writer.into_inner() {
                         Ok(inner) => match String::from_utf8(inner) {
-                            Ok(encoded) => {
+                            Ok(encoded) => Ok(json!({ "body": encoded })),
-                                json!({ "body": encoded })
-                            }
 
                             Err(e) => {
                                 warn!("Failed to write UTF-8: {:?}", e);
 
-                                json!({"error": "Failed to write UTF-8"})
+                                Err(json!({"error": "Failed to write UTF-8"}))
                             }
                         },
 
                         Err(e) => {
                             warn!("Failed to extract CSV: {:?}", e);
 
-                            json!({"error": "Failed to extract CSV"})
+                            Err(json!({"error": "Failed to extract CSV"}))
                         }
                     }
                 }
@@ -99,7 +100,7 @@ pub async fn export_reminders(
                 Err(e) => {
                     warn!("Failed to complete SQL query: {:?}", e);
 
-                    json!({"error": "Failed to query reminders"})
+                    Err(json!({"error": "Failed to query reminders"}))
                 }
             }
         }
@@ -107,7 +108,7 @@ pub async fn export_reminders(
         Err(e) => {
             warn!("Could not fetch channels from {}: {:?}", id, e);
 
-            json!({"error": "Failed to get guild channels"})
+            Err(json!({"error": "Failed to get guild channels"}))
         }
     }
 }
@@ -119,28 +120,86 @@ pub async fn import_reminders(
     body: Json<ImportBody>,
     ctx: &State<Context>,
     pool: &State<Pool<MySql>>,
-) -> JsonValue {
+) -> JsonResult {
     check_authorization!(cookies, ctx.inner(), id);
 
+    let user_id =
+        cookies.get_private("userid").map(|c| c.value().parse::<u64>().ok()).flatten().unwrap();
+
     match base64::decode(&body.body) {
         Ok(body) => {
             let mut reader = csv::Reader::from_reader(body.as_slice());
 
             for result in reader.deserialize::<ReminderCsv>() {
                 match result {
-                    Ok(record) => {}
+                    Ok(record) => {
+                        let channel_id = record.channel.split_at(1).1;
 
-                    Err(e) => {
+                        match channel_id.parse::<u64>() {
-                        warn!("Couldn't deserialize CSV row: {:?}", e);
+                            Ok(channel_id) => {
-                    }
+                                let reminder = Reminder {
-                }
+                                    attachment: record.attachment,
-            }
+                                    attachment_name: record.attachment_name,
+                                    avatar: record.avatar,
+                                    channel: channel_id,
+                                    content: record.content,
+                                    embed_author: record.embed_author,
+                                    embed_author_url: record.embed_author_url,
+                                    embed_color: record.embed_color,
+                                    embed_description: record.embed_description,
+                                    embed_footer: record.embed_footer,
+                                    embed_footer_url: record.embed_footer_url,
+                                    embed_image_url: record.embed_image_url,
+                                    embed_thumbnail_url: record.embed_thumbnail_url,
+                                    embed_title: record.embed_title,
+                                    embed_fields: record
+                                        .embed_fields
+                                        .map(|s| serde_json::from_str(&s).ok())
+                                        .flatten(),
+                                    enabled: record.enabled,
+                                    expires: record.expires,
+                                    interval_seconds: record.interval_seconds,
+                                    interval_months: record.interval_months,
+                                    name: record.name,
+                                    restartable: record.restartable,
+                                    tts: record.tts,
+                                    uid: generate_uid(),
+                                    username: record.username,
+                                    utc_time: record.utc_time,
+                                };
 
-            json!({"error": "Not implemented"})
+                                create_reminder(
+                                    ctx.inner(),
+                                    pool.inner(),
+                                    GuildId(id),
+                                    UserId(user_id),
+                                    reminder,
+                                )
+                                .await?;
                             }
 
                             Err(_) => {
-            json!({"error": "Malformed base64"})
+                                return json_err!(format!(
+                                    "Failed to parse channel {}",
+                                    channel_id
+                                ));
+                            }
+                        }
+                    }
+
+                    Err(e) => {
+                        warn!("Couldn't deserialize CSV row: {:?}", e);
+
+                        return json_err!("Deserialize error. Aborted");
+                    }
+                }
+            }
+
+            Ok(json!({}))
+        }
+
+        Err(_) => {
+            json_err!("Malformed base64")
         }
     }
 }
@@ -151,7 +210,7 @@ pub async fn export_todos(
     cookies: &CookieJar<'_>,
     ctx: &State<Context>,
     pool: &State<Pool<MySql>>,
-) -> JsonValue {
+) -> JsonResult {
     check_authorization!(cookies, ctx.inner(), id);
 
     let mut csv_writer = WriterBuilder::new().quote_style(QuoteStyle::Always).from_writer(vec![]);
@@ -174,28 +233,27 @@ pub async fn export_todos(
 
             match csv_writer.into_inner() {
                 Ok(inner) => match String::from_utf8(inner) {
-                    Ok(encoded) => {
+                    Ok(encoded) => Ok(json!({ "body": encoded })),
-                        json!({ "body": encoded })
-                    }
 
                     Err(e) => {
                         warn!("Failed to write UTF-8: {:?}", e);
 
-                        json!({"error": "Failed to write UTF-8"})
+                        json_err!("Failed to write UTF-8")
                     }
                 },
 
                 Err(e) => {
                     warn!("Failed to extract CSV: {:?}", e);
 
-                    json!({"error": "Failed to extract CSV"})
+                    json_err!("Failed to extract CSV")
                 }
             }
         }
+
         Err(e) => {
             warn!("Could not fetch templates from {}: {:?}", id, e);
 
-            json!({"error": "Failed to query templates"})
+            json_err!("Failed to query templates")
         }
     }
 }
@@ -207,7 +265,7 @@ pub async fn import_todos(
     body: Json<ImportBody>,
     ctx: &State<Context>,
     pool: &State<Pool<MySql>>,
-) -> JsonValue {
+) -> JsonResult {
     check_authorization!(cookies, ctx.inner(), id);
 
     let channels_res = GuildId(id).channels(&ctx.inner()).await;
@@ -231,17 +289,18 @@ pub async fn import_todos(
                                         if channels.contains_key(&ChannelId(channel_id)) {
                                             query_params.push((record.value, Some(channel_id), id));
                                         } else {
-                                            return json!({
+                                            return json_err!(format!(
-                                                "error":
+                                                "Invalid channel ID {}",
-                                                    format!("Invalid channel ID {}", channel_id)
+                                                channel_id
-                                            });
+                                            ));
                                         }
                                     }
 
                                     Err(_) => {
-                                        return json!({
+                                        return json_err!(format!(
-                                            "error": format!("Invalid channel ID {}", channel_id)
+                                            "Invalid channel ID {}",
-                                        });
+                                            channel_id
+                                        ));
                                     }
                                 }
                             }
@@ -254,7 +313,7 @@ pub async fn import_todos(
                         Err(e) => {
                             warn!("Couldn't deserialize CSV row: {:?}", e);
 
-                            return json!({"error": "Deserialize error. Aborted"});
+                            return json_err!("Deserialize error. Aborted");
                         }
                     }
                 }
@@ -279,27 +338,25 @@ pub async fn import_todos(
                 let res = query.execute(pool.inner()).await;
 
                 match res {
-                    Ok(_) => {
+                    Ok(_) => Ok(json!({})),
-                        json!({})
-                    }
 
                     Err(e) => {
                         warn!("Couldn't execute todo query: {:?}", e);
 
-                        json!({"error": "An unexpected error occured."})
+                        json_err!("An unexpected error occured.")
                     }
                 }
             }
 
             Err(_) => {
-                json!({"error": "Malformed base64"})
+                json_err!("Malformed base64")
             }
         },
 
         Err(e) => {
             warn!("Couldn't fetch channels for guild {}: {:?}", id, e);
 
-            json!({"error": "Couldn't fetch channels."})
+            json_err!("Couldn't fetch channels.")
         }
     }
 }
@@ -310,7 +367,7 @@ pub async fn export_reminder_templates(
     cookies: &CookieJar<'_>,
     ctx: &State<Context>,
     pool: &State<Pool<MySql>>,
-) -> JsonValue {
+) -> JsonResult {
     check_authorization!(cookies, ctx.inner(), id);
 
     let mut csv_writer = WriterBuilder::new().quote_style(QuoteStyle::Always).from_writer(vec![]);
@@ -348,28 +405,26 @@ pub async fn export_reminder_templates(
 
             match csv_writer.into_inner() {
                 Ok(inner) => match String::from_utf8(inner) {
-                    Ok(encoded) => {
+                    Ok(encoded) => Ok(json!({ "body": encoded })),
-                        json!({ "body": encoded })
-                    }
 
                     Err(e) => {
                         warn!("Failed to write UTF-8: {:?}", e);
 
-                        json!({"error": "Failed to write UTF-8"})
+                        json_err!("Failed to write UTF-8")
                     }
                 },
 
                 Err(e) => {
                     warn!("Failed to extract CSV: {:?}", e);
 
-                    json!({"error": "Failed to extract CSV"})
+                    json_err!("Failed to extract CSV")
                 }
             }
         }
         Err(e) => {
             warn!("Could not fetch templates from {}: {:?}", id, e);
 
-            json!({"error": "Failed to query templates"})
+            json_err!("Failed to query templates")
         }
     }
 }

web/src/routes/dashboard/guild.rs

@@ -1,10 +1,8 @@
 use std::env;
 
-use base64;
-use chrono::Utc;
 use rocket::{
     http::CookieJar,
-    serde::json::{json, Json, Value as JsonValue},
+    serde::json::{json, Json},
     State,
 };
 use serde::Serialize;
@@ -18,16 +16,14 @@ use serenity::{
 use sqlx::{MySql, Pool};
 
 use crate::{
-    check_guild_subscription, check_subscription,
     consts::{
-        DAY, MAX_CONTENT_LENGTH, MAX_EMBED_AUTHOR_LENGTH, MAX_EMBED_DESCRIPTION_LENGTH,
+        MAX_CONTENT_LENGTH, MAX_EMBED_AUTHOR_LENGTH, MAX_EMBED_DESCRIPTION_LENGTH,
         MAX_EMBED_FIELDS, MAX_EMBED_FIELD_TITLE_LENGTH, MAX_EMBED_FIELD_VALUE_LENGTH,
         MAX_EMBED_FOOTER_LENGTH, MAX_EMBED_TITLE_LENGTH, MAX_URL_LENGTH, MAX_USERNAME_LENGTH,
-        MIN_INTERVAL,
     },
     routes::dashboard::{
-        create_database_channel, generate_uid, name_default, template_name_default, DeleteReminder,
+        create_database_channel, create_reminder, template_name_default, DeleteReminder,
-        DeleteReminderTemplate, PatchReminder, Reminder, ReminderTemplate,
+        DeleteReminderTemplate, JsonResult, PatchReminder, Reminder, ReminderTemplate,
     },
 };
 
@@ -44,7 +40,7 @@ pub async fn get_guild_patreon(
     id: u64,
     cookies: &CookieJar<'_>,
     ctx: &State<Context>,
-) -> JsonValue {
+) -> JsonResult {
     check_authorization!(cookies, ctx.inner(), id);
 
     match GuildId(id).to_guild_cached(ctx.inner()) {
@@ -59,12 +55,10 @@ pub async fn get_guild_patreon(
                     .contains(&RoleId(env::var("PATREON_ROLE_ID").unwrap().parse().unwrap()))
             });
 
-            json!({ "patreon": patreon })
+            Ok(json!({ "patreon": patreon }))
         }
 
-        None => {
+        None => json_err!("Bot not in guild"),
-            json!({"error": "Bot not in guild"})
-        }
     }
 }
 
@@ -73,7 +67,7 @@ pub async fn get_guild_channels(
     id: u64,
     cookies: &CookieJar<'_>,
     ctx: &State<Context>,
-) -> JsonValue {
+) -> JsonResult {
     check_authorization!(cookies, ctx.inner(), id);
 
     match GuildId(id).to_guild_cached(ctx.inner()) {
@@ -97,12 +91,10 @@ pub async fn get_guild_channels(
                 })
                 .collect::<Vec<ChannelInfo>>();
 
-            json!(channel_info)
+            Ok(json!(channel_info))
         }
 
-        None => {
+        None => json_err!("Bot not in guild"),
-            json!({"error": "Bot not in guild"})
-        }
     }
 }
 
@@ -113,7 +105,7 @@ struct RoleInfo {
 }
 
 #[get("/api/guild/<id>/roles")]
-pub async fn get_guild_roles(id: u64, cookies: &CookieJar<'_>, ctx: &State<Context>) -> JsonValue {
+pub async fn get_guild_roles(id: u64, cookies: &CookieJar<'_>, ctx: &State<Context>) -> JsonResult {
     check_authorization!(cookies, ctx.inner(), id);
 
     let roles_res = ctx.cache.guild_roles(id);
@@ -125,12 +117,12 @@ pub async fn get_guild_roles(id: u64, cookies: &CookieJar<'_>, ctx: &State<Conte
                 .map(|(_, r)| RoleInfo { id: r.id.to_string(), name: r.name.to_string() })
                 .collect::<Vec<RoleInfo>>();
 
-            json!(roles)
+            Ok(json!(roles))
         }
         None => {
             warn!("Could not fetch roles from {}", id);
 
-            json!({"error": "Could not get roles"})
+            json_err!("Could not get roles")
         }
     }
 }
@@ -141,7 +133,7 @@ pub async fn get_reminder_templates(
     cookies: &CookieJar<'_>,
     ctx: &State<Context>,
     pool: &State<Pool<MySql>>,
-) -> JsonValue {
+) -> JsonResult {
     check_authorization!(cookies, ctx.inner(), id);
 
     match sqlx::query_as_unchecked!(
@@ -152,13 +144,11 @@ pub async fn get_reminder_templates(
     .fetch_all(pool.inner())
     .await
     {
-        Ok(templates) => {
+        Ok(templates) => Ok(json!(templates)),
-            json!(templates)
-        }
         Err(e) => {
             warn!("Could not fetch templates from {}: {:?}", id, e);
 
-            json!({"error": "Could not get templates"})
+            json_err!("Could not get templates")
         }
     }
 }
@@ -170,7 +160,7 @@ pub async fn create_reminder_template(
     cookies: &CookieJar<'_>,
     ctx: &State<Context>,
     pool: &State<Pool<MySql>>,
-) -> JsonValue {
+) -> JsonResult {
     check_authorization!(cookies, ctx.inner(), id);
 
     // validate lengths
@@ -254,12 +244,12 @@ pub async fn create_reminder_template(
     .await
     {
         Ok(_) => {
-            json!({})
+            Ok(json!({}))
         }
         Err(e) => {
             warn!("Could not fetch templates from {}: {:?}", id, e);
 
-            json!({"error": "Could not get templates"})
+            json_err!("Could not get templates")
         }
     }
 }
@@ -271,7 +261,7 @@ pub async fn delete_reminder_template(
     cookies: &CookieJar<'_>,
     ctx: &State<Context>,
     pool: &State<Pool<MySql>>,
-) -> JsonValue {
+) -> JsonResult {
     check_authorization!(cookies, ctx.inner(), id);
 
     match sqlx::query!(
@@ -282,230 +272,41 @@ pub async fn delete_reminder_template(
     .await
     {
         Ok(_) => {
-            json!({})
+            Ok(json!({}))
         }
         Err(e) => {
             warn!("Could not delete template from {}: {:?}", id, e);
 
-            json!({"error": "Could not delete template"})
+            json_err!("Could not delete template")
         }
     }
 }
 
 #[post("/api/guild/<id>/reminders", data = "<reminder>")]
-pub async fn create_reminder(
+pub async fn create_guild_reminder(
     id: u64,
     reminder: Json<Reminder>,
     cookies: &CookieJar<'_>,
     serenity_context: &State<Context>,
     pool: &State<Pool<MySql>>,
-) -> JsonValue {
+) -> JsonResult {
     check_authorization!(cookies, serenity_context.inner(), id);
 
     let user_id =
         cookies.get_private("userid").map(|c| c.value().parse::<u64>().ok()).flatten().unwrap();
 
-    // validate channel
+    create_reminder(
-    let channel = ChannelId(reminder.channel).to_channel_cached(&serenity_context.inner());
-    let channel_exists = channel.is_some();
-
-    let channel_matches_guild =
-        channel.map_or(false, |c| c.guild().map_or(false, |c| c.guild_id.0 == id));
-
-    if !channel_matches_guild || !channel_exists {
-        warn!(
-            "Error in `create_reminder`: channel {} not found for guild {} (channel exists: {})",
-            reminder.channel, id, channel_exists
-        );
-
-        return json!({"error": "Channel not found"});
-    }
-
-    let channel = create_database_channel(
         serenity_context.inner(),
-        ChannelId(reminder.channel),
         pool.inner(),
+        GuildId(id),
+        UserId(user_id),
+        reminder.into_inner(),
     )
-    .await;
-
-    if let Err(e) = channel {
-        warn!("`create_database_channel` returned an error code: {:?}", e);
-
-        return json!({"error": "Failed to configure channel for reminders. Please check the bot permissions"});
-    }
-
-    let channel = channel.unwrap();
-
-    // validate lengths
-    check_length!(MAX_CONTENT_LENGTH, reminder.content);
-    check_length!(MAX_EMBED_DESCRIPTION_LENGTH, reminder.embed_description);
-    check_length!(MAX_EMBED_TITLE_LENGTH, reminder.embed_title);
-    check_length!(MAX_EMBED_AUTHOR_LENGTH, reminder.embed_author);
-    check_length!(MAX_EMBED_FOOTER_LENGTH, reminder.embed_footer);
-    check_length_opt!(MAX_EMBED_FIELDS, reminder.embed_fields);
-    if let Some(fields) = &reminder.embed_fields {
-        for field in &fields.0 {
-            check_length!(MAX_EMBED_FIELD_VALUE_LENGTH, field.value);
-            check_length!(MAX_EMBED_FIELD_TITLE_LENGTH, field.title);
-        }
-    }
-    check_length_opt!(MAX_USERNAME_LENGTH, reminder.username);
-    check_length_opt!(
-        MAX_URL_LENGTH,
-        reminder.embed_footer_url,
-        reminder.embed_thumbnail_url,
-        reminder.embed_author_url,
-        reminder.embed_image_url,
-        reminder.avatar
-    );
-
-    // validate urls
-    check_url_opt!(
-        reminder.embed_footer_url,
-        reminder.embed_thumbnail_url,
-        reminder.embed_author_url,
-        reminder.embed_image_url,
-        reminder.avatar
-    );
-
-    // validate time and interval
-    if reminder.utc_time < Utc::now().naive_utc() {
-        return json!({"error": "Time must be in the future"});
-    }
-    if reminder.interval_seconds.is_some() || reminder.interval_months.is_some() {
-        if reminder.interval_months.unwrap_or(0) * 30 * DAY as u32
-            + reminder.interval_seconds.unwrap_or(0)
-            < *MIN_INTERVAL
-        {
-            return json!({"error": "Interval too short"});
-        }
-    }
-
-    // check patreon if necessary
-    if reminder.interval_seconds.is_some() || reminder.interval_months.is_some() {
-        if !check_guild_subscription(serenity_context.inner(), GuildId(id)).await
-            && !check_subscription(serenity_context.inner(), user_id).await
-        {
-            return json!({"error": "Patreon is required to set intervals"});
-        }
-    }
-
-    // base64 decode error dropped here
-    let attachment_data = reminder.attachment.as_ref().map(|s| base64::decode(s).ok()).flatten();
-    let name = if reminder.name.is_empty() { name_default() } else { reminder.name.clone() };
-
-    let new_uid = generate_uid();
-
-    // write to db
-    match sqlx::query!(
-        "INSERT INTO reminders (
-         uid,
-         attachment,
-         attachment_name,
-         channel_id,
-         avatar,
-         content,
-         embed_author,
-         embed_author_url,
-         embed_color,
-         embed_description,
-         embed_footer,
-         embed_footer_url,
-         embed_image_url,
-         embed_thumbnail_url,
-         embed_title,
-         embed_fields,
-         enabled,
-         expires,
-         interval_seconds,
-         interval_months,
-         name,
-         restartable,
-         tts,
-         username,
-         `utc_time`
-        ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)",
-        new_uid,
-        attachment_data,
-        reminder.attachment_name,
-        channel,
-        reminder.avatar,
-        reminder.content,
-        reminder.embed_author,
-        reminder.embed_author_url,
-        reminder.embed_color,
-        reminder.embed_description,
-        reminder.embed_footer,
-        reminder.embed_footer_url,
-        reminder.embed_image_url,
-        reminder.embed_thumbnail_url,
-        reminder.embed_title,
-        reminder.embed_fields,
-        reminder.enabled,
-        reminder.expires,
-        reminder.interval_seconds,
-        reminder.interval_months,
-        name,
-        reminder.restartable,
-        reminder.tts,
-        reminder.username,
-        reminder.utc_time,
-    )
-    .execute(pool.inner())
     .await
-    {
-        Ok(_) => sqlx::query_as_unchecked!(
-            Reminder,
-            "SELECT
-             reminders.attachment,
-             reminders.attachment_name,
-             reminders.avatar,
-             channels.channel,
-             reminders.content,
-             reminders.embed_author,
-             reminders.embed_author_url,
-             reminders.embed_color,
-             reminders.embed_description,
-             reminders.embed_footer,
-             reminders.embed_footer_url,
-             reminders.embed_image_url,
-             reminders.embed_thumbnail_url,
-             reminders.embed_title,
-             reminders.embed_fields,
-             reminders.enabled,
-             reminders.expires,
-             reminders.interval_seconds,
-             reminders.interval_months,
-             reminders.name,
-             reminders.restartable,
-             reminders.tts,
-             reminders.uid,
-             reminders.username,
-             reminders.utc_time
-            FROM reminders
-            LEFT JOIN channels ON channels.id = reminders.channel_id
-            WHERE uid = ?",
-            new_uid
-        )
-        .fetch_one(pool.inner())
-        .await
-        .map(|r| json!(r))
-        .unwrap_or_else(|e| {
-            warn!("Failed to complete SQL query: {:?}", e);
-
-            json!({"error": "Could not load reminder"})
-        }),
-
-        Err(e) => {
-            warn!("Error in `create_reminder`: Could not execute query: {:?}", e);
-
-            json!({"error": "Unknown error"})
-        }
-    }
 }
 
 #[get("/api/guild/<id>/reminders")]
-pub async fn get_reminders(id: u64, ctx: &State<Context>, pool: &State<Pool<MySql>>) -> JsonValue {
+pub async fn get_reminders(id: u64, ctx: &State<Context>, pool: &State<Pool<MySql>>) -> JsonResult {
     let channels_res = GuildId(id).channels(&ctx.inner()).await;
 
     match channels_res {
@@ -552,17 +353,17 @@ pub async fn get_reminders(id: u64, ctx: &State<Context>, pool: &State<Pool<MySq
             )
             .fetch_all(pool.inner())
             .await
-            .map(|r| json!(r))
+            .map(|r| Ok(json!(r)))
             .unwrap_or_else(|e| {
                 warn!("Failed to complete SQL query: {:?}", e);
 
-                json!({"error": "Could not load reminders"})
+                json_err!("Could not load reminders")
             })
         }
         Err(e) => {
             warn!("Could not fetch channels from {}: {:?}", id, e);
 
-            json!([])
+            Ok(json!([]))
         }
     }
 }
@@ -573,7 +374,7 @@ pub async fn edit_reminder(
     reminder: Json<PatchReminder>,
     serenity_context: &State<Context>,
     pool: &State<Pool<MySql>>,
-) -> JsonValue {
+) -> JsonResult {
     let mut error = vec![];
 
     update_field!(pool.inner(), error, reminder.[
@@ -614,7 +415,7 @@ pub async fn edit_reminder(
                         reminder.channel, id
                     );
 
-                    return json!({"error": "Channel not found"});
+                    return Err(json!({"error": "Channel not found"}));
                 }
 
                 let channel = create_database_channel(
@@ -627,7 +428,9 @@ pub async fn edit_reminder(
                 if let Err(e) = channel {
                     warn!("`create_database_channel` returned an error code: {:?}", e);
 
-                    return json!({"error": "Failed to configure channel for reminders. Please check the bot permissions"});
+                    return Err(
+                        json!({"error": "Failed to configure channel for reminders. Please check the bot permissions"}),
+                    );
                 }
 
                 let channel = channel.unwrap();
@@ -655,7 +458,7 @@ pub async fn edit_reminder(
                     reminder.channel, id
                 );
 
-                return json!({"error": "Channel not found"});
+                return Err(json!({"error": "Channel not found"}));
             }
         }
     }
@@ -695,12 +498,12 @@ pub async fn edit_reminder(
     .fetch_one(pool.inner())
     .await
     {
-        Ok(reminder) => json!({"reminder": reminder, "errors": error}),
+        Ok(reminder) => Ok(json!({"reminder": reminder, "errors": error})),
 
         Err(e) => {
             warn!("Error exiting `edit_reminder': {:?}", e);
 
-            json!({"reminder": Option::<Reminder>::None, "errors": vec!["Unknown error"]})
+            Err(json!({"reminder": Option::<Reminder>::None, "errors": vec!["Unknown error"]}))
         }
     }
 }
@@ -709,19 +512,17 @@ pub async fn edit_reminder(
 pub async fn delete_reminder(
     reminder: Json<DeleteReminder>,
     pool: &State<Pool<MySql>>,
-) -> JsonValue {
+) -> JsonResult {
     match sqlx::query!("DELETE FROM reminders WHERE uid = ?", reminder.uid)
         .execute(pool.inner())
         .await
     {
-        Ok(_) => {
+        Ok(_) => Ok(json!({})),
-            json!({})
-        }
 
         Err(e) => {
             warn!("Error in `delete_reminder`: {:?}", e);
 
-            json!({"error": "Could not delete reminder"})
+            Err(json!({"error": "Could not delete reminder"}))
         }
     }
 }

web/src/routes/dashboard/mod.rs

@@ -1,15 +1,29 @@
 use std::collections::HashMap;
 
-use chrono::naive::NaiveDateTime;
+use chrono::{naive::NaiveDateTime, Utc};
 use rand::{rngs::OsRng, seq::IteratorRandom};
-use rocket::{http::CookieJar, response::Redirect};
+use rocket::{
+    http::CookieJar,
+    response::Redirect,
+    serde::json::{json, Value as JsonValue},
+};
 use rocket_dyn_templates::Template;
 use serde::{Deserialize, Serialize};
-use serenity::{http::Http, model::id::ChannelId};
+use serenity::{
-use sqlx::{types::Json, Executor};
+    client::Context,
+    http::Http,
+    model::id::{ChannelId, GuildId, UserId},
+};
+use sqlx::{types::Json, Executor, MySql, Pool};
 
 use crate::{
-    consts::{CHARACTERS, DEFAULT_AVATAR},
+    check_guild_subscription, check_subscription,
+    consts::{
+        CHARACTERS, DAY, DEFAULT_AVATAR, MAX_CONTENT_LENGTH, MAX_EMBED_AUTHOR_LENGTH,
+        MAX_EMBED_DESCRIPTION_LENGTH, MAX_EMBED_FIELDS, MAX_EMBED_FIELD_TITLE_LENGTH,
+        MAX_EMBED_FIELD_VALUE_LENGTH, MAX_EMBED_FOOTER_LENGTH, MAX_EMBED_TITLE_LENGTH,
+        MAX_URL_LENGTH, MAX_USERNAME_LENGTH, MIN_INTERVAL,
+    },
     Database, Error,
 };
 
@@ -17,6 +31,7 @@ pub mod export;
 pub mod guild;
 pub mod user;
 
+pub type JsonResult = Result<JsonValue, JsonValue>;
 type Unset<T> = Option<T>;
 
 fn name_default() -> String {
@@ -134,7 +149,7 @@ pub struct ReminderCsv {
     attachment: Option<Vec<u8>>,
     attachment_name: Option<String>,
     avatar: Option<String>,
-    channel: u64,
+    channel: String,
     content: String,
     embed_author: String,
     embed_author_url: Option<String>,
@@ -284,6 +299,209 @@ pub struct TodoCsv {
     channel_id: Option<String>,
 }
 
+pub async fn create_reminder(
+    ctx: &Context,
+    pool: &Pool<MySql>,
+    guild_id: GuildId,
+    user_id: UserId,
+    reminder: Reminder,
+) -> JsonResult {
+    // validate channel
+    let channel = ChannelId(reminder.channel).to_channel_cached(&ctx);
+    let channel_exists = channel.is_some();
+
+    let channel_matches_guild =
+        channel.map_or(false, |c| c.guild().map_or(false, |c| c.guild_id == guild_id));
+
+    if !channel_matches_guild || !channel_exists {
+        warn!(
+            "Error in `create_reminder`: channel {} not found for guild {} (channel exists: {})",
+            reminder.channel, guild_id, channel_exists
+        );
+
+        return Err(json!({"error": "Channel not found"}));
+    }
+
+    let channel = create_database_channel(&ctx, ChannelId(reminder.channel), pool).await;
+
+    if let Err(e) = channel {
+        warn!("`create_database_channel` returned an error code: {:?}", e);
+
+        return Err(
+            json!({"error": "Failed to configure channel for reminders. Please check the bot permissions"}),
+        );
+    }
+
+    let channel = channel.unwrap();
+
+    // validate lengths
+    check_length!(MAX_CONTENT_LENGTH, reminder.content);
+    check_length!(MAX_EMBED_DESCRIPTION_LENGTH, reminder.embed_description);
+    check_length!(MAX_EMBED_TITLE_LENGTH, reminder.embed_title);
+    check_length!(MAX_EMBED_AUTHOR_LENGTH, reminder.embed_author);
+    check_length!(MAX_EMBED_FOOTER_LENGTH, reminder.embed_footer);
+    check_length_opt!(MAX_EMBED_FIELDS, reminder.embed_fields);
+    if let Some(fields) = &reminder.embed_fields {
+        for field in &fields.0 {
+            check_length!(MAX_EMBED_FIELD_VALUE_LENGTH, field.value);
+            check_length!(MAX_EMBED_FIELD_TITLE_LENGTH, field.title);
+        }
+    }
+    check_length_opt!(MAX_USERNAME_LENGTH, reminder.username);
+    check_length_opt!(
+        MAX_URL_LENGTH,
+        reminder.embed_footer_url,
+        reminder.embed_thumbnail_url,
+        reminder.embed_author_url,
+        reminder.embed_image_url,
+        reminder.avatar
+    );
+
+    // validate urls
+    check_url_opt!(
+        reminder.embed_footer_url,
+        reminder.embed_thumbnail_url,
+        reminder.embed_author_url,
+        reminder.embed_image_url,
+        reminder.avatar
+    );
+
+    // validate time and interval
+    if reminder.utc_time < Utc::now().naive_utc() {
+        return Err(json!({"error": "Time must be in the future"}));
+    }
+    if reminder.interval_seconds.is_some() || reminder.interval_months.is_some() {
+        if reminder.interval_months.unwrap_or(0) * 30 * DAY as u32
+            + reminder.interval_seconds.unwrap_or(0)
+            < *MIN_INTERVAL
+        {
+            return Err(json!({"error": "Interval too short"}));
+        }
+    }
+
+    // check patreon if necessary
+    if reminder.interval_seconds.is_some() || reminder.interval_months.is_some() {
+        if !check_guild_subscription(&ctx, guild_id).await
+            && !check_subscription(&ctx, user_id).await
+        {
+            return Err(json!({"error": "Patreon is required to set intervals"}));
+        }
+    }
+
+    // base64 decode error dropped here
+    let attachment_data = reminder.attachment.as_ref().map(|s| base64::decode(s).ok()).flatten();
+    let name = if reminder.name.is_empty() { name_default() } else { reminder.name.clone() };
+
+    let new_uid = generate_uid();
+
+    // write to db
+    match sqlx::query!(
+        "INSERT INTO reminders (
+         uid,
+         attachment,
+         attachment_name,
+         channel_id,
+         avatar,
+         content,
+         embed_author,
+         embed_author_url,
+         embed_color,
+         embed_description,
+         embed_footer,
+         embed_footer_url,
+         embed_image_url,
+         embed_thumbnail_url,
+         embed_title,
+         embed_fields,
+         enabled,
+         expires,
+         interval_seconds,
+         interval_months,
+         name,
+         restartable,
+         tts,
+         username,
+         `utc_time`
+        ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)",
+        new_uid,
+        attachment_data,
+        reminder.attachment_name,
+        channel,
+        reminder.avatar,
+        reminder.content,
+        reminder.embed_author,
+        reminder.embed_author_url,
+        reminder.embed_color,
+        reminder.embed_description,
+        reminder.embed_footer,
+        reminder.embed_footer_url,
+        reminder.embed_image_url,
+        reminder.embed_thumbnail_url,
+        reminder.embed_title,
+        reminder.embed_fields,
+        reminder.enabled,
+        reminder.expires,
+        reminder.interval_seconds,
+        reminder.interval_months,
+        name,
+        reminder.restartable,
+        reminder.tts,
+        reminder.username,
+        reminder.utc_time,
+    )
+    .execute(pool)
+    .await
+    {
+        Ok(_) => sqlx::query_as_unchecked!(
+            Reminder,
+            "SELECT
+             reminders.attachment,
+             reminders.attachment_name,
+             reminders.avatar,
+             channels.channel,
+             reminders.content,
+             reminders.embed_author,
+             reminders.embed_author_url,
+             reminders.embed_color,
+             reminders.embed_description,
+             reminders.embed_footer,
+             reminders.embed_footer_url,
+             reminders.embed_image_url,
+             reminders.embed_thumbnail_url,
+             reminders.embed_title,
+             reminders.embed_fields,
+             reminders.enabled,
+             reminders.expires,
+             reminders.interval_seconds,
+             reminders.interval_months,
+             reminders.name,
+             reminders.restartable,
+             reminders.tts,
+             reminders.uid,
+             reminders.username,
+             reminders.utc_time
+            FROM reminders
+            LEFT JOIN channels ON channels.id = reminders.channel_id
+            WHERE uid = ?",
+            new_uid
+        )
+        .fetch_one(pool)
+        .await
+        .map(|r| Ok(json!(r)))
+        .unwrap_or_else(|e| {
+            warn!("Failed to complete SQL query: {:?}", e);
+
+            Err(json!({"error": "Could not load reminder"}))
+        }),
+
+        Err(e) => {
+            warn!("Error in `create_reminder`: Could not execute query: {:?}", e);
+
+            Err(json!({"error": "Unknown error"}))
+        }
+    }
+}
+
 async fn create_database_channel(
     ctx: impl AsRef<Http>,
     channel: ChannelId,