more todo commands

src/commands/todo_cmds.rs

@@ -13,9 +13,21 @@ use serenity::{
     framework::standard::CommandResult,
 };
 
+use std::fmt;
+
 use crate::SQLPool;
 use sqlx::MySqlPool;
+use std::convert::TryFrom;
 
+#[derive(Debug)]
+struct TodoNotFound;
+
+impl std::error::Error for TodoNotFound {}
+impl fmt::Display for TodoNotFound {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "Todo not found")
+    }
+}
 
 #[derive(Debug)]
 struct Todo {
@@ -33,6 +45,18 @@ struct TodoTarget {
 }
 
 impl TodoTarget {
+    pub fn name(&self) -> String {
+        if self.channel.is_some() {
+            "Channel"
+        }
+        else if self.guild.is_some() {
+            "Guild"
+        }
+        else {
+            "User"
+        }.to_string()
+    }
+
     pub async fn view(&self, pool: MySqlPool) -> Result<Vec<Todo>, Box<dyn std::error::Error + Send + Sync>> {
         Ok(if let Some(cid) = self.channel {
             sqlx::query_as!(Todo,
@@ -53,7 +77,7 @@ SELECT * FROM todos WHERE guild_id = (SELECT id FROM guilds WHERE guild = ?) AND
         else {
             sqlx::query_as!(Todo,
                 "
-SELECT * FROM todos WHERE user_id = (SELECT id FROM users WHERE user = ?)
+SELECT * FROM todos WHERE user_id = (SELECT id FROM users WHERE user = ?) AND guild_id IS NULL
                 ", self.user.as_u64())
                 .fetch_all(&pool)
                 .await?
@@ -101,15 +125,21 @@ INSERT INTO todos (user_id, value) VALUES (
         Ok(())
     }
 
-    pub async fn remove(&self, num: u32, pool: MySqlPool) -> Result<(), Box<dyn std::error::Error + Sync + Send>> {
-        sqlx::query!(
-            "
-DELETE FROM todos WHERE id = (SELECT id FROM (SELECT id FROM todos LIMIT ?,1) AS t)
-            ", num)
-            .execute(&pool)
-            .await?;
+    pub async fn remove(&self, num: usize, pool: MySqlPool) -> Result<(), Box<dyn std::error::Error + Sync + Send>> {
+        let todos = self.view(pool.clone()).await?;
 
-        Ok(())
+        if let Some(removal_todo) = todos.get(num) {
+            sqlx::query!(
+                "
+DELETE FROM todos WHERE id = ?
+                ", removal_todo.id)
+                .execute(&pool)
+                .await?;
+            Ok(())
+        }
+        else {
+            Err(Box::try_from(TodoNotFound).unwrap())
+        }
     }
 
     pub async fn clear(&self, pool: MySqlPool) -> Result<(), Box<dyn std::error::Error + Sync + Send>> {
@@ -132,7 +162,7 @@ DELETE FROM todos WHERE guild_id = (SELECT id FROM guilds WHERE guild = ?) AND c
         else {
             sqlx::query!(
                 "
-DELETE FROM todos WHERE user_id = (SELECT id FROM users WHERE user = ?)
+DELETE FROM todos WHERE user_id = (SELECT id FROM users WHERE user = ?) AND guild_id IS NULL
                 ", self.user.as_u64())
                 .execute(&pool)
                 .await?;
@@ -197,7 +227,7 @@ async fn todo_parse(ctx: &Context, msg: &Message, args: String) -> CommandResult
             };
 
             if let Some(subcommand) = subcommand_opt {
-                todo(ctx, target, subcommand, "".to_string()).await;
+                todo(ctx, msg, target, subcommand, split.collect::<Vec<&str>>().join(" ")).await;
             }
             else {
                 let _ = msg.channel_id.say(&ctx, "Todo help").await;
@@ -216,25 +246,65 @@ async fn todo_parse(ctx: &Context, msg: &Message, args: String) -> CommandResult
     Ok(())
 }
 
-async fn todo(ctx: &Context, target: TodoTarget, subcommand: SubCommand, extra: String) {
+async fn todo(ctx: &Context, msg: &Message, target: TodoTarget, subcommand: SubCommand, extra: String) {
     let pool = ctx.data.read().await
         .get::<SQLPool>().cloned().expect("Could not get SQLPool from data");
 
     match subcommand {
         SubCommand::View => {
-            println!("{:?}", target.view(pool).await.unwrap());
+            let todo_items = target.view(pool).await.unwrap();
+            let mut todo_groups = vec!["".to_string()];
+            let mut char_count: u16 = 0;
+
+            todo_items.iter().enumerate().for_each(|(count, todo)| {
+                let display = format!("{}: {}\n", count + 1, todo.value);
+
+                if char_count + display.len() as u16 > 2000 {
+                    char_count = display.len() as u16;
+
+                    todo_groups.push(display);
+                }
+                else {
+                    char_count += display.len() as u16;
+
+                    let last_group = todo_groups.pop().unwrap();
+
+                    todo_groups.push(format!("{}{}", last_group, display));
+                }
+            });
+
+            for group in todo_groups {
+                let _ = msg.channel_id.send_message(&ctx, |m| m
+                    .embed(|e| e
+                        .title(format!("{} Todo", target.name()))
+                        .description(group)
+                    )
+                ).await;
+            }
         },
 
         SubCommand::Add => {
+            target.add(extra, pool).await.unwrap();
 
+            let _ = msg.channel_id.say(&ctx, "Todo added").await;
         },
 
         SubCommand::Remove => {
-
+            let _ = if let Ok(num) = extra.parse::<usize>() {
+                if target.remove(num - 1, pool).await.is_ok() {
+                    msg.channel_id.say(&ctx, "Todo removed")
+                }
+                else {
+                    msg.channel_id.say(&ctx, "Todo not removed")
+                }
+            }
+            else {
+                msg.channel_id.say(&ctx, "Todo not removed")
+            }.await;
         },
 
         SubCommand::Clear => {
-
+            target.clear(pool).await.unwrap();
         },
     }
 }

src/main.rs

@@ -55,6 +55,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
         .add_command("help", &info_cmds::HELP_COMMAND)
         .add_command("info", &info_cmds::INFO_COMMAND)
         .add_command("donate", &info_cmds::DONATE_COMMAND)
+        .add_command("todo", &todo_cmds::TODO_PARSE_COMMAND)
         .build();
 
     let mut client = Client::new(&env::var("DISCORD_TOKEN").expect("Missing DISCORD_TOKEN from environment"))