feat: holiday exclusion logic for ICS command

Cargo.lock

@@ -168,7 +168,7 @@ dependencies = [
 
 [[package]]
 name = "banner"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -184,15 +184,16 @@ dependencies = [
  "futures",
  "governor",
  "http 1.3.1",
+ "num-format",
  "once_cell",
  "poise",
  "rand 0.9.2",
- "redis",
  "regex",
  "reqwest 0.12.23",
  "reqwest-middleware",
  "serde",
  "serde_json",
+ "serde_path_to_error",
  "serenity",
  "sqlx",
  "thiserror 2.0.16",
@@ -336,20 +337,6 @@ dependencies = [
  "windows-link 0.2.0",
 ]
 
-[[package]]
-name = "combine"
-version = "4.6.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba5a308b75df32fe02788e748662718f03fde005016435c444eea572398219fd"
-dependencies = [
- "bytes",
- "futures-core",
- "memchr",
- "pin-project-lite",
- "tokio",
- "tokio-util",
-]
-
 [[package]]
 name = "command_attr"
 version = "0.5.3"
@@ -1665,16 +1652,6 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
-[[package]]
-name = "num-bigint"
-version = "0.4.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a5e44f723f1133c9deac646763579fdb3ac745e418f2a7af9cd0c431da1f20b9"
-dependencies = [
- "num-integer",
- "num-traits",
-]
-
 [[package]]
 name = "num-bigint-dig"
 version = "0.8.4"
@@ -1698,6 +1675,16 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "51d515d32fb182ee37cda2ccdcb92950d6a3c2893aa280e540671c2cd0f3b1d9"
 
+[[package]]
+name = "num-format"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a652d9771a63711fd3c3deb670acfbe5c30a4072e664d7a3bf5a9e1056ac72c3"
+dependencies = [
+ "arrayvec",
+ "itoa",
+]
+
 [[package]]
 name = "num-integer"
 version = "0.1.46"
@@ -2031,17 +2018,6 @@ version = "5.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
 
-[[package]]
-name = "r2d2"
-version = "0.8.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "51de85fb3fb6524929c8a2eb85e6b6d363de4e8c48f9e2c2eac4944abc181c93"
-dependencies = [
- "log",
- "parking_lot",
- "scheduled-thread-pool",
-]
-
 [[package]]
 name = "rand"
 version = "0.8.5"
@@ -2110,29 +2086,6 @@ dependencies = [
  "bitflags 2.9.4",
 ]
 
-[[package]]
-name = "redis"
-version = "0.32.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7cd3650deebc68526b304898b192fa4102a4ef0b9ada24da096559cb60e0eef8"
-dependencies = [
- "bytes",
- "cfg-if",
- "combine",
- "futures-util",
- "itoa",
- "num-bigint",
- "percent-encoding",
- "pin-project-lite",
- "r2d2",
- "ryu",
- "sha1_smol",
- "socket2 0.6.0",
- "tokio",
- "tokio-util",
- "url",
-]
-
 [[package]]
 name = "redox_syscall"
 version = "0.5.17"
@@ -2454,15 +2407,6 @@ dependencies = [
  "windows-sys 0.59.0",
 ]
 
-[[package]]
-name = "scheduled-thread-pool"
-version = "0.2.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3cbc66816425a074528352f5789333ecff06ca41b36b0b0efdfbb29edc391a19"
-dependencies = [
- "parking_lot",
-]
-
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -2641,12 +2585,6 @@ dependencies = [
  "digest",
 ]
 
-[[package]]
-name = "sha1_smol"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bbfa15b3dddfee50a0fff136974b3e1bde555604ba463834a7eb7deb6417705d"
-
 [[package]]
 name = "sha2"
 version = "0.10.9"

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "banner"
-version = "0.1.0"
+version = "0.2.0"
 edition = "2024"
 default-run = "banner"
 
@@ -20,7 +20,6 @@ futures = "0.3"
 http = "1.3.1"
 poise = "0.6.1"
 rand = "0.9.2"
-redis = { version = "0.32.5", features = ["tokio-comp", "r2d2"] }
 regex = "1.10"
 reqwest = { version = "0.12.23", features = ["json", "cookies"] }
 reqwest-middleware = { version = "0.4.2", features = ["json"] }
@@ -43,5 +42,7 @@ tracing-subscriber = { version = "0.3.20", features = ["env-filter", "json"] }
 url = "2.5"
 governor = "0.10.1"
 once_cell = "1.21.3"
+serde_path_to_error = "0.1.17"
+num-format = "0.4.4"
 
 [dev-dependencies]

src/banner/json.rs

@@ -1,16 +1,34 @@
 //! JSON parsing utilities for the Banner API client.
 
 use anyhow::Result;
+use serde_json;
 
 /// Attempt to parse JSON and, on failure, include a contextual snippet of the
 /// line where the error occurred. This prevents dumping huge JSON bodies to logs.
 pub fn parse_json_with_context<T: serde::de::DeserializeOwned>(body: &str) -> Result<T> {
-    match serde_json::from_str::<T>(body) {
+    let jd = &mut serde_json::Deserializer::from_str(body);
+    match serde_path_to_error::deserialize(jd) {
         Ok(value) => Ok(value),
         Err(err) => {
-            let (line, column) = (err.line(), err.column());
-            // let snippet = build_error_snippet(body, line, column, 80);
-            Err(anyhow::anyhow!("{err} at line {line}, column {column}",))
+            let inner_err = err.inner();
+            let (line, column) = (inner_err.line(), inner_err.column());
+            let snippet = build_error_snippet(body, line, column, 20);
+            let path = err.path().to_string();
+
+            let msg = inner_err.to_string();
+            let loc = format!(" at line {line} column {column}");
+            let msg_without_loc = msg.strip_suffix(&loc).unwrap_or(&msg).to_string();
+
+            let mut final_err = String::new();
+            if !path.is_empty() && path != "." {
+                final_err.push_str(&format!("for path '{}' ", path));
+            }
+            final_err.push_str(&format!(
+                "({msg_without_loc}) at line {line} column {column}"
+            ));
+            final_err.push_str(&format!("\n{snippet}"));
+
+            Err(anyhow::anyhow!(final_err))
         }
     }
 }

src/banner/models/meetings.rs

@@ -33,7 +33,7 @@ pub struct FacultyItem {
     #[serde(deserialize_with = "deserialize_string_to_u32")]
     pub course_reference_number: u32, // CRN, e.g 27294
     pub display_name: String,     // "LastName, FirstName"
-    pub email_address: String,    // e.g. FirstName.LastName@utsaedu
+    pub email_address: Option<String>, // e.g. FirstName.LastName@utsaedu
     pub primary_indicator: bool,
     pub term: String, // e.g "202420"
 }
@@ -63,7 +63,7 @@ pub struct MeetingTime {
     pub campus: Option<String>, // campus code, e.g 11
     pub campus_description: Option<String>, // name of campus, e.g Main Campus
     pub course_reference_number: String, // CRN, e.g 27294
-    pub credit_hour_session: f64, // e.g. 30
+    pub credit_hour_session: Option<f64>, // e.g. 30
     pub hours_week: f64, // e.g. 30
     pub meeting_schedule_type: String, // e.g AFF
     pub meeting_type: String, // e.g HB, H2, H1, OS, OA, OH, ID, FF
@@ -148,6 +148,8 @@ pub enum DayOfWeek {
 
 impl DayOfWeek {
     /// Convert to short string representation
+    ///
+    /// Do not change these, these are used for ICS generation. Casing does not matter though.
     pub fn to_short_string(self) -> &'static str {
         match self {
             DayOfWeek::Monday => "Mo",

src/banner/rate_limit_middleware.rs

@@ -4,7 +4,7 @@ use crate::banner::rate_limiter::{RequestType, SharedRateLimiter};
 use http::Extensions;
 use reqwest::{Request, Response};
 use reqwest_middleware::{Middleware, Next};
-use tracing::{debug, warn, trace};
+use tracing::{debug, trace, warn};
 use url::Url;
 
 /// Middleware that enforces rate limiting based on request URL patterns
@@ -90,7 +90,7 @@ impl Middleware for RateLimitMiddleware {
             }
             Err(error) => {
                 warn!(
-                    url = %error.url().unwrap_or(&Url::parse("unknown").unwrap()),
+                    url = ?error.url(),
                     error = ?error,
                     "Request failed"
                 );

src/bot/commands/ics.rs

@@ -1,8 +1,111 @@
 //! ICS command implementation for generating calendar files.
 
+use crate::banner::{Course, MeetingScheduleInfo};
 use crate::bot::{Context, Error, utils};
+use chrono::{Datelike, NaiveDate, Utc};
+use serenity::all::CreateAttachment;
 use tracing::info;
 
+/// Represents a holiday or special day that should be excluded from class schedules
+#[derive(Debug, Clone)]
+enum Holiday {
+    /// A single-day holiday
+    Single { month: u32, day: u32 },
+    /// A multi-day holiday range
+    Range {
+        month: u32,
+        start_day: u32,
+        end_day: u32,
+    },
+}
+
+impl Holiday {
+    /// Check if a specific date falls within this holiday
+    fn contains_date(&self, date: NaiveDate) -> bool {
+        match self {
+            Holiday::Single { month, day, .. } => date.month() == *month && date.day() == *day,
+            Holiday::Range {
+                month,
+                start_day,
+                end_day,
+                ..
+            } => date.month() == *month && date.day() >= *start_day && date.day() <= *end_day,
+        }
+    }
+
+    /// Get all dates in this holiday for a given year
+    fn get_dates_for_year(&self, year: i32) -> Vec<NaiveDate> {
+        match self {
+            Holiday::Single { month, day, .. } => {
+                if let Some(date) = NaiveDate::from_ymd_opt(year, *month, *day) {
+                    vec![date]
+                } else {
+                    Vec::new()
+                }
+            }
+            Holiday::Range {
+                month,
+                start_day,
+                end_day,
+                ..
+            } => {
+                let mut dates = Vec::new();
+                for day in *start_day..=*end_day {
+                    if let Some(date) = NaiveDate::from_ymd_opt(year, *month, day) {
+                        dates.push(date);
+                    }
+                }
+                dates
+            }
+        }
+    }
+}
+
+/// University holidays that should be excluded from class schedules
+const UNIVERSITY_HOLIDAYS: &[(&'static str, Holiday)] = &[
+    ("Labor Day", Holiday::Single { month: 9, day: 1 }),
+    (
+        "Fall Break",
+        Holiday::Range {
+            month: 10,
+            start_day: 13,
+            end_day: 14,
+        },
+    ),
+    (
+        "Unspecified Holiday",
+        Holiday::Single { month: 11, day: 26 },
+    ),
+    (
+        "Thanksgiving",
+        Holiday::Range {
+            month: 11,
+            start_day: 28,
+            end_day: 29,
+        },
+    ),
+    ("Student Study Day", Holiday::Single { month: 12, day: 5 }),
+    (
+        "Winter Holiday",
+        Holiday::Range {
+            month: 12,
+            start_day: 23,
+            end_day: 31,
+        },
+    ),
+    ("New Year's Day", Holiday::Single { month: 1, day: 1 }),
+    ("MLK Day", Holiday::Single { month: 1, day: 20 }),
+    (
+        "Spring Break",
+        Holiday::Range {
+            month: 3,
+            start_day: 10,
+            end_day: 15,
+        },
+    ),
+    ("Student Study Day", Holiday::Single { month: 5, day: 9 }),
+];
+
 /// Generate an ICS file for a course
 #[poise::command(slash_command, prefix_command)]
 pub async fn ics(
@@ -12,14 +115,322 @@ pub async fn ics(
     ctx.defer().await?;
 
     let course = utils::get_course_by_crn(&ctx, crn).await?;
+    let term = course.term.clone();
 
-    // TODO: Implement actual ICS file generation
-    ctx.say(format!(
-        "ICS generation for '{}' is not yet implemented.",
-        course.display_title()
-    ))
+    // Get meeting times
+    let meeting_times = ctx
+        .data()
+        .app_state
+        .banner_api
+        .get_course_meeting_time(&term, &crn.to_string())
+        .await?;
+
+    if meeting_times.is_empty() {
+        ctx.say("No meeting times found for this course.").await?;
+        return Ok(());
+    }
+
+    // Sort meeting times by start time
+    let mut sorted_meeting_times = meeting_times.to_vec();
+    sorted_meeting_times.sort_unstable_by(|a, b| match (&a.time_range, &b.time_range) {
+        (Some(a_time), Some(b_time)) => a_time.start.cmp(&b_time.start),
+        (Some(_), None) => std::cmp::Ordering::Less,
+        (None, Some(_)) => std::cmp::Ordering::Greater,
+        (None, None) => a.days.bits().cmp(&b.days.bits()),
+    });
+
+    // Generate ICS content
+    let (ics_content, excluded_holidays) =
+        generate_ics_content(&course, &term, &sorted_meeting_times)?;
+
+    // Create file attachment
+    let filename = format!(
+        "{subject}_{number}_{section}.ics",
+        subject = course.subject.replace(" ", "_"),
+        number = course.course_number,
+        section = course.sequence_number,
+    );
+
+    let file = CreateAttachment::bytes(ics_content.into_bytes(), filename.clone());
+
+    // Build response content
+    let mut response_content = format!(
+        "📅 Generated ICS calendar for **{}**\n\n**Meeting Times:**\n{}",
+        course.display_title(),
+        sorted_meeting_times
+            .iter()
+            .enumerate()
+            .map(|(i, m)| {
+                let time_info = match &m.time_range {
+                    Some(range) => format!(
+                        "{} {}",
+                        m.days_string().unwrap_or("TBA".to_string()),
+                        range.format_12hr()
+                    ),
+                    None => m.days_string().unwrap_or("TBA".to_string()),
+                };
+                format!("{}. {}", i + 1, time_info)
+            })
+            .collect::<Vec<_>>()
+            .join("\n")
+    );
+
+    // Add holiday exclusion information
+    if !excluded_holidays.is_empty() {
+        let count = excluded_holidays.len();
+        let count_text = if count == 1 {
+            "1 date was".to_string()
+        } else {
+            format!("{} dates were", count)
+        };
+        response_content.push_str(&format!("\n\n{} excluded from the ICS file:\n", count_text));
+        response_content.push_str(
+            &excluded_holidays
+                .iter()
+                .map(|s| format!("- {}", s))
+                .collect::<Vec<_>>()
+                .join("\n"),
+        );
+    }
+
+    ctx.send(
+        poise::CreateReply::default()
+            .content(response_content)
+            .attachment(file),
+    )
     .await?;
 
     info!(crn = %crn, "ics command completed");
     Ok(())
 }
+
+/// Generate ICS content for a course and its meeting times
+fn generate_ics_content(
+    course: &Course,
+    term: &str,
+    meeting_times: &[MeetingScheduleInfo],
+) -> Result<(String, Vec<String>), anyhow::Error> {
+    let mut ics_content = String::new();
+    let mut excluded_holidays = Vec::new();
+
+    // ICS header
+    ics_content.push_str("BEGIN:VCALENDAR\r\n");
+    ics_content.push_str("VERSION:2.0\r\n");
+    ics_content.push_str("PRODID:-//Banner Bot//Course Calendar//EN\r\n");
+    ics_content.push_str("CALSCALE:GREGORIAN\r\n");
+    ics_content.push_str("METHOD:PUBLISH\r\n");
+
+    // Calendar name
+    ics_content.push_str(&format!(
+        "X-WR-CALNAME:{} - {}\r\n",
+        course.display_title(),
+        term
+    ));
+
+    // Generate events for each meeting time
+    for (index, meeting_time) in meeting_times.iter().enumerate() {
+        let (event_content, holidays) = generate_event_content(course, meeting_time, index)?;
+        ics_content.push_str(&event_content);
+        excluded_holidays.extend(holidays);
+    }
+
+    // ICS footer
+    ics_content.push_str("END:VCALENDAR\r\n");
+
+    Ok((ics_content, excluded_holidays))
+}
+
+/// Generate ICS event content for a single meeting time
+fn generate_event_content(
+    course: &Course,
+    meeting_time: &MeetingScheduleInfo,
+    index: usize,
+) -> Result<(String, Vec<String>), anyhow::Error> {
+    let course_title = course.display_title();
+    let instructor_name = course.primary_instructor_name();
+    let location = meeting_time.place_string();
+
+    // Create event title with meeting index if multiple meetings
+    let event_title = if index > 0 {
+        format!("{} (Meeting {})", course_title, index + 1)
+    } else {
+        course_title
+    };
+
+    // Create event description
+    let description = format!(
+        "CRN: {}\\nInstructor: {}\\nDays: {}\\nMeeting Type: {}",
+        course.course_reference_number,
+        instructor_name,
+        meeting_time.days_string().unwrap_or("TBA".to_string()),
+        meeting_time.meeting_type.description()
+    );
+
+    // Get start and end times
+    let (start_dt, end_dt) = meeting_time.datetime_range();
+
+    // Format datetimes for ICS (UTC format)
+    let start_utc = start_dt.with_timezone(&Utc);
+    let end_utc = end_dt.with_timezone(&Utc);
+
+    let start_str = start_utc.format("%Y%m%dT%H%M%SZ").to_string();
+    let end_str = end_utc.format("%Y%m%dT%H%M%SZ").to_string();
+
+    // Generate unique ID for the event
+    let uid = format!(
+        "{}-{}-{}@banner-bot.local",
+        course.course_reference_number,
+        index,
+        start_utc.timestamp()
+    );
+
+    let mut event_content = String::new();
+
+    // Event header
+    event_content.push_str("BEGIN:VEVENT\r\n");
+    event_content.push_str(&format!("UID:{}\r\n", uid));
+    event_content.push_str(&format!("DTSTART:{}\r\n", start_str));
+    event_content.push_str(&format!("DTEND:{}\r\n", end_str));
+    event_content.push_str(&format!("SUMMARY:{}\r\n", escape_ics_text(&event_title)));
+    event_content.push_str(&format!(
+        "DESCRIPTION:{}\r\n",
+        escape_ics_text(&description)
+    ));
+    event_content.push_str(&format!("LOCATION:{}\r\n", escape_ics_text(&location)));
+
+    // Add recurrence rule if there are specific days and times
+    if !meeting_time.days.is_empty() && meeting_time.time_range.is_some() {
+        let days_of_week = meeting_time.days_of_week();
+        let by_day: Vec<String> = days_of_week
+            .iter()
+            .map(|day| day.to_short_string().to_uppercase())
+            .collect();
+
+        if !by_day.is_empty() {
+            let until_date = meeting_time
+                .date_range
+                .end
+                .format("%Y%m%dT000000Z")
+                .to_string();
+
+            event_content.push_str(&format!(
+                "RRULE:FREQ=WEEKLY;BYDAY={};UNTIL={}\r\n",
+                by_day.join(","),
+                until_date
+            ));
+
+            // Add holiday exceptions (EXDATE) if the class would meet on holiday dates
+            let holiday_exceptions = get_holiday_exceptions(meeting_time);
+            if let Some(exdate_property) = generate_exdate_property(&holiday_exceptions, start_utc)
+            {
+                event_content.push_str(&format!("{}\r\n", exdate_property));
+            }
+
+            // Collect holiday names for reporting
+            let mut holiday_names = Vec::new();
+            for (holiday_name, holiday) in UNIVERSITY_HOLIDAYS {
+                for &exception_date in &holiday_exceptions {
+                    if holiday.contains_date(exception_date) {
+                        holiday_names.push(format!(
+                            "{} ({})",
+                            holiday_name,
+                            exception_date.format("%a, %b %d")
+                        ));
+                    }
+                }
+            }
+            holiday_names.sort();
+            holiday_names.dedup();
+
+            return Ok((event_content, holiday_names));
+        }
+    }
+
+    // Event footer
+    event_content.push_str("END:VEVENT\r\n");
+
+    Ok((event_content, Vec::new()))
+}
+
+/// Convert chrono::Weekday to the custom DayOfWeek enum
+fn chrono_weekday_to_day_of_week(weekday: chrono::Weekday) -> crate::banner::meetings::DayOfWeek {
+    use crate::banner::meetings::DayOfWeek;
+    match weekday {
+        chrono::Weekday::Mon => DayOfWeek::Monday,
+        chrono::Weekday::Tue => DayOfWeek::Tuesday,
+        chrono::Weekday::Wed => DayOfWeek::Wednesday,
+        chrono::Weekday::Thu => DayOfWeek::Thursday,
+        chrono::Weekday::Fri => DayOfWeek::Friday,
+        chrono::Weekday::Sat => DayOfWeek::Saturday,
+        chrono::Weekday::Sun => DayOfWeek::Sunday,
+    }
+}
+
+/// Check if a class meets on a specific date based on its meeting days
+fn class_meets_on_date(meeting_time: &MeetingScheduleInfo, date: NaiveDate) -> bool {
+    let weekday = chrono_weekday_to_day_of_week(date.weekday());
+    let meeting_days = meeting_time.days_of_week();
+
+    meeting_days.contains(&weekday)
+}
+
+/// Get holiday dates that fall within the course date range and would conflict with class meetings
+fn get_holiday_exceptions(meeting_time: &MeetingScheduleInfo) -> Vec<NaiveDate> {
+    let mut exceptions = Vec::new();
+
+    // Get the year range from the course date range
+    let start_year = meeting_time.date_range.start.year();
+    let end_year = meeting_time.date_range.end.year();
+
+    for (_, holiday) in UNIVERSITY_HOLIDAYS {
+        // Check for the holiday in each year of the course
+        for year in start_year..=end_year {
+            let holiday_dates = holiday.get_dates_for_year(year);
+
+            for holiday_date in holiday_dates {
+                // Check if the holiday falls within the course date range
+                if holiday_date >= meeting_time.date_range.start
+                    && holiday_date <= meeting_time.date_range.end
+                {
+                    // Check if the class would actually meet on this day
+                    if class_meets_on_date(meeting_time, holiday_date) {
+                        exceptions.push(holiday_date);
+                    }
+                }
+            }
+        }
+    }
+
+    exceptions
+}
+
+/// Generate EXDATE property for holiday exceptions
+fn generate_exdate_property(
+    exceptions: &[NaiveDate],
+    start_time: chrono::DateTime<Utc>,
+) -> Option<String> {
+    if exceptions.is_empty() {
+        return None;
+    }
+
+    let mut exdate_values = Vec::new();
+
+    for &exception_date in exceptions {
+        // Create a datetime for the exception using the same time as the start time
+        let exception_datetime = exception_date.and_time(start_time.time()).and_utc();
+
+        let exdate_str = exception_datetime.format("%Y%m%dT%H%M%SZ").to_string();
+        exdate_values.push(exdate_str);
+    }
+
+    Some(format!("EXDATE:{}", exdate_values.join(",")))
+}
+
+/// Escape text for ICS format
+fn escape_ics_text(text: &str) -> String {
+    text.replace("\\", "\\\\")
+        .replace(";", "\\;")
+        .replace(",", "\\,")
+        .replace("\n", "\\n")
+        .replace("\r", "")
+}

src/config/mod.rs

@@ -25,8 +25,6 @@ pub struct Config {
     pub port: u16,
     /// Database connection URL
     pub database_url: String,
-    /// Redis connection URL
-    pub redis_url: String,
     /// Graceful shutdown timeout duration
     ///
     /// Accepts both numeric values (seconds) and duration strings

src/main.rs

@@ -1,4 +1,6 @@
-use serenity::all::{ClientBuilder, GatewayIntents};
+use figment::value::UncasedStr;
+use num_format::{Locale, ToFormattedString};
+use serenity::all::{ActivityData, ClientBuilder, GatewayIntents};
 use tokio::signal;
 use tracing::{error, info, warn};
 use tracing_subscriber::{EnvFilter, FmtSubscriber};
@@ -26,13 +28,34 @@ mod services;
 mod state;
 mod web;
 
+async fn update_bot_status(
+    ctx: &serenity::all::Context,
+    app_state: &AppState,
+) -> Result<(), anyhow::Error> {
+    let course_count = app_state.get_course_count().await?;
+
+    ctx.set_activity(Some(ActivityData::playing(format!(
+        "Querying {:} classes",
+        course_count.to_formatted_string(&Locale::en)
+    ))));
+
+    tracing::info!(course_count = course_count, "Updated bot status");
+    Ok(())
+}
+
 #[tokio::main]
 async fn main() {
     dotenvy::dotenv().ok();
 
     // Load configuration first to get log level
     let config: Config = Figment::new()
-        .merge(Env::raw())
+        .merge(Env::raw().map(|k| {
+            if k == UncasedStr::new("RAILWAY_DEPLOYMENT_DRAINING_SECONDS") {
+                "SHUTDOWN_TIMEOUT".into()
+            } else {
+                k.into()
+            }
+        }))
         .extract()
         .expect("Failed to load config");
 
@@ -95,8 +118,7 @@ async fn main() {
     .expect("Failed to create BannerApi");
 
     let banner_api_arc = Arc::new(banner_api);
-    let app_state = AppState::new(banner_api_arc.clone(), &config.redis_url)
-        .expect("Failed to create AppState");
+    let app_state = AppState::new(banner_api_arc.clone(), db_pool.clone());
 
     // Create BannerState for web service
     let banner_state = BannerState {
@@ -167,6 +189,27 @@ async fn main() {
                 )
                 .await?;
                 poise::builtins::register_globally(ctx, &framework.options().commands).await?;
+
+                // Start status update task
+                let status_app_state = app_state.clone();
+                let status_ctx = ctx.clone();
+                tokio::spawn(async move {
+                    let mut interval = tokio::time::interval(std::time::Duration::from_secs(30));
+
+                    // Update status immediately on startup
+                    if let Err(e) = update_bot_status(&status_ctx, &status_app_state).await {
+                        tracing::error!(error = %e, "Failed to update status on startup");
+                    }
+
+                    loop {
+                        interval.tick().await;
+
+                        if let Err(e) = update_bot_status(&status_ctx, &status_app_state).await {
+                            tracing::error!(error = %e, "Failed to update bot status");
+                        }
+                    }
+                });
+
                 Ok(Data { app_state })
             })
         })

src/scraper/jobs/mod.rs

@@ -0,0 +1,112 @@
+pub mod subject;
+
+use crate::banner::BannerApi;
+use crate::data::models::TargetType;
+use crate::error::Result;
+use serde::{Deserialize, Serialize};
+use sqlx::PgPool;
+use std::fmt;
+
+/// Errors that can occur during job parsing
+#[derive(Debug)]
+pub enum JobParseError {
+    InvalidJson(serde_json::Error),
+    UnsupportedTargetType(TargetType),
+    MissingRequiredField(String),
+}
+
+impl fmt::Display for JobParseError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            JobParseError::InvalidJson(e) => write!(f, "Invalid JSON in job payload: {}", e),
+            JobParseError::UnsupportedTargetType(t) => {
+                write!(f, "Unsupported target type: {:?}", t)
+            }
+            JobParseError::MissingRequiredField(field) => {
+                write!(f, "Missing required field: {}", field)
+            }
+        }
+    }
+}
+
+impl std::error::Error for JobParseError {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        match self {
+            JobParseError::InvalidJson(e) => Some(e),
+            _ => None,
+        }
+    }
+}
+
+/// Errors that can occur during job processing
+#[derive(Debug)]
+pub enum JobError {
+    Recoverable(anyhow::Error),   // API failures, network issues
+    Unrecoverable(anyhow::Error), // Parse errors, corrupted data
+}
+
+impl fmt::Display for JobError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            JobError::Recoverable(e) => write!(f, "Recoverable error: {}", e),
+            JobError::Unrecoverable(e) => write!(f, "Unrecoverable error: {}", e),
+        }
+    }
+}
+
+impl std::error::Error for JobError {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        match self {
+            JobError::Recoverable(e) => e.source(),
+            JobError::Unrecoverable(e) => e.source(),
+        }
+    }
+}
+
+/// Common trait interface for all job types
+#[async_trait::async_trait]
+pub trait Job: Send + Sync {
+    /// The target type this job handles
+    fn target_type(&self) -> TargetType;
+
+    /// Process the job with the given API client and database pool
+    async fn process(&self, banner_api: &BannerApi, db_pool: &PgPool) -> Result<()>;
+
+    /// Get a human-readable description of the job
+    fn description(&self) -> String;
+}
+
+/// Main job enum that dispatches to specific job implementations
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum JobType {
+    Subject(subject::SubjectJob),
+}
+
+impl JobType {
+    /// Create a job from the target type and payload
+    pub fn from_target_type_and_payload(
+        target_type: TargetType,
+        payload: serde_json::Value,
+    ) -> Result<Self, JobParseError> {
+        match target_type {
+            TargetType::Subject => {
+                let subject_job: subject::SubjectJob =
+                    serde_json::from_value(payload).map_err(JobParseError::InvalidJson)?;
+                Ok(JobType::Subject(subject_job))
+            }
+            _ => Err(JobParseError::UnsupportedTargetType(target_type)),
+        }
+    }
+
+    /// Convert to a Job trait object
+    pub fn as_job(self) -> Box<dyn Job> {
+        match self {
+            JobType::Subject(job) => Box::new(job),
+        }
+    }
+}
+
+/// Helper function to create a subject job
+pub fn create_subject_job(subject: String) -> JobType {
+    JobType::Subject(subject::SubjectJob::new(subject))
+}

src/scraper/jobs/subject.rs

@@ -0,0 +1,93 @@
+use super::Job;
+use crate::banner::{BannerApi, Course, SearchQuery, Term};
+use crate::data::models::TargetType;
+use crate::error::Result;
+use serde::{Deserialize, Serialize};
+use sqlx::PgPool;
+use tracing::{debug, info, trace};
+
+/// Job implementation for scraping subject data
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct SubjectJob {
+    pub subject: String,
+}
+
+impl SubjectJob {
+    pub fn new(subject: String) -> Self {
+        Self { subject }
+    }
+}
+
+#[async_trait::async_trait]
+impl Job for SubjectJob {
+    fn target_type(&self) -> TargetType {
+        TargetType::Subject
+    }
+
+    async fn process(&self, banner_api: &BannerApi, db_pool: &PgPool) -> Result<()> {
+        let subject_code = &self.subject;
+        debug!(subject = subject_code, "Processing subject job");
+
+        // Get the current term
+        let term = Term::get_current().inner().to_string();
+        let query = SearchQuery::new().subject(subject_code).max_results(500);
+
+        let search_result = banner_api
+            .search(&term, &query, "subjectDescription", false)
+            .await?;
+
+        if let Some(courses_from_api) = search_result.data {
+            info!(
+                subject = subject_code,
+                count = courses_from_api.len(),
+                "Found courses"
+            );
+            for course in courses_from_api {
+                self.upsert_course(&course, db_pool).await?;
+            }
+        }
+
+        debug!(subject = subject_code, "Subject job completed");
+        Ok(())
+    }
+
+    fn description(&self) -> String {
+        format!("Scrape subject: {}", self.subject)
+    }
+}
+
+impl SubjectJob {
+    async fn upsert_course(&self, course: &Course, db_pool: &PgPool) -> Result<()> {
+        sqlx::query(
+            r#"
+            INSERT INTO courses (crn, subject, course_number, title, term_code, enrollment, max_enrollment, wait_count, wait_capacity, last_scraped_at)
+            VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10)
+            ON CONFLICT (crn, term_code) DO UPDATE SET
+                subject = EXCLUDED.subject,
+                course_number = EXCLUDED.course_number,
+                title = EXCLUDED.title,
+                enrollment = EXCLUDED.enrollment,
+                max_enrollment = EXCLUDED.max_enrollment,
+                wait_count = EXCLUDED.wait_count,
+                wait_capacity = EXCLUDED.wait_capacity,
+                last_scraped_at = EXCLUDED.last_scraped_at
+            "#,
+        )
+        .bind(&course.course_reference_number)
+        .bind(&course.subject)
+        .bind(&course.course_number)
+        .bind(&course.course_title)
+        .bind(&course.term)
+        .bind(course.enrollment)
+        .bind(course.maximum_enrollment)
+        .bind(course.wait_count)
+        .bind(course.wait_capacity)
+        .bind(chrono::Utc::now())
+        .execute(db_pool)
+        .await
+        .map(|result| {
+            trace!(subject = course.subject, crn = course.course_reference_number, result = ?result, "Course upserted");
+        })
+        .map_err(|e| anyhow::anyhow!("Failed to upsert course: {e}"))
+    }
+}

src/scraper/mod.rs

@@ -1,3 +1,4 @@
+pub mod jobs;
 pub mod scheduler;
 pub mod worker;
 

src/scraper/scheduler.rs

@@ -1,12 +1,13 @@
 use crate::banner::{BannerApi, Term};
 use crate::data::models::{ScrapePriority, TargetType};
 use crate::error::Result;
+use crate::scraper::jobs::subject::SubjectJob;
 use serde_json::json;
 use sqlx::PgPool;
 use std::sync::Arc;
 use std::time::Duration;
 use tokio::time;
-use tracing::{error, info, debug, trace};
+use tracing::{debug, error, info, trace};
 
 /// Periodically analyzes data and enqueues prioritized scrape jobs.
 pub struct Scheduler {
@@ -40,42 +41,77 @@ impl Scheduler {
     async fn schedule_jobs(&self) -> Result<()> {
         // For now, we will implement a simple baseline scheduling strategy:
         // 1. Get a list of all subjects from the Banner API.
-        // 2. For each subject, check if an active (not locked, not completed) job already exists.
-        // 3. If no job exists, create a new, low-priority job to be executed in the near future.
+        // 2. Query existing jobs for all subjects in a single query.
+        // 3. Create new jobs only for subjects that don't have existing jobs.
         let term = Term::get_current().inner().to_string();
 
         debug!(term = term, "Enqueuing subject jobs");
 
         let subjects = self.banner_api.get_subjects("", &term, 1, 500).await?;
-        debug!(subject_count = subjects.len(), "Retrieved subjects from API");
+        debug!(
+            subject_count = subjects.len(),
+            "Retrieved subjects from API"
+        );
 
-        for subject in subjects {
-            let payload = json!({ "subject": subject.code });
+        // Create payloads for all subjects
+        let subject_payloads: Vec<_> = subjects
+            .iter()
+            .map(|subject| json!({ "subject": subject.code }))
+            .collect();
 
-            let existing_job: Option<(i32,)> = sqlx::query_as(
-                "SELECT id FROM scrape_jobs WHERE target_type = $1 AND target_payload = $2 AND locked_at IS NULL"
-            )
-            .bind(TargetType::Subject)
-            .bind(&payload)
-            .fetch_optional(&self.db_pool)
-            .await?;
+        // Query existing jobs for all subjects in a single query
+        let existing_jobs: Vec<(serde_json::Value,)> = sqlx::query_as(
+            "SELECT target_payload FROM scrape_jobs 
+             WHERE target_type = $1 AND target_payload = ANY($2) AND locked_at IS NULL",
+        )
+        .bind(TargetType::Subject)
+        .bind(&subject_payloads)
+        .fetch_all(&self.db_pool)
+        .await?;
 
-            if existing_job.is_some() {
-                trace!(subject = subject.code, "Job already exists, skipping");
-                continue;
+        // Convert to a HashSet for efficient lookup
+        let existing_payloads: std::collections::HashSet<String> = existing_jobs
+            .into_iter()
+            .map(|(payload,)| payload.to_string())
+            .collect();
+
+        // Filter out subjects that already have jobs and prepare new jobs
+        let new_jobs: Vec<_> = subjects
+            .into_iter()
+            .filter_map(|subject| {
+                let job = SubjectJob::new(subject.code.clone());
+                let payload = serde_json::to_value(&job).unwrap();
+                let payload_str = payload.to_string();
+
+                if existing_payloads.contains(&payload_str) {
+                    trace!(subject = subject.code, "Job already exists, skipping");
+                    None
+                } else {
+                    Some((payload, subject.code))
+                }
+            })
+            .collect();
+
+        // Insert all new jobs in a single batch
+        if !new_jobs.is_empty() {
+            let now = chrono::Utc::now();
+            let mut tx = self.db_pool.begin().await?;
+
+            for (payload, subject_code) in new_jobs {
+                sqlx::query(
+                    "INSERT INTO scrape_jobs (target_type, target_payload, priority, execute_at) VALUES ($1, $2, $3, $4)"
+                )
+                .bind(TargetType::Subject)
+                .bind(&payload)
+                .bind(ScrapePriority::Low)
+                .bind(now)
+                .execute(&mut *tx)
+                .await?;
+
+                debug!(subject = subject_code, "New job enqueued for subject");
             }
 
-            sqlx::query(
-                "INSERT INTO scrape_jobs (target_type, target_payload, priority, execute_at) VALUES ($1, $2, $3, $4)"
-            )
-            .bind(TargetType::Subject)
-            .bind(&payload)
-            .bind(ScrapePriority::Low)
-            .bind(chrono::Utc::now())
-            .execute(&self.db_pool)
-            .await?;
-
-            debug!(subject = subject.code, "New job enqueued for subject");
+            tx.commit().await?;
         }
 
         debug!("Job scheduling complete");

src/scraper/worker.rs

@@ -1,7 +1,7 @@
-use crate::banner::{BannerApi, BannerApiError, Course, SearchQuery, Term};
+use crate::banner::{BannerApi, BannerApiError};
 use crate::data::models::ScrapeJob;
 use crate::error::Result;
-use serde_json::Value;
+use crate::scraper::jobs::{JobError, JobType};
 use sqlx::PgPool;
 use std::sync::Arc;
 use std::time::Duration;
@@ -35,38 +35,58 @@ impl Worker {
                 Ok(Some(job)) => {
                     let job_id = job.id;
                     debug!(worker_id = self.id, job_id = job.id, "Processing job");
-                    if let Err(e) = self.process_job(job).await {
-                        // Check if the error is due to an invalid session
-                        if let Some(BannerApiError::InvalidSession(_)) =
-                            e.downcast_ref::<BannerApiError>()
-                        {
-                            warn!(
-                                worker_id = self.id,
-                                job_id, "Invalid session detected. Forcing session refresh."
-                            );
-                        } else {
-                            error!(worker_id = self.id, job_id, error = ?e, "Failed to process job");
+                    match self.process_job(job).await {
+                        Ok(()) => {
+                            debug!(worker_id = self.id, job_id, "Job completed");
+                            // If successful, delete the job.
+                            if let Err(delete_err) = self.delete_job(job_id).await {
+                                error!(
+                                    worker_id = self.id,
+                                    job_id,
+                                    ?delete_err,
+                                    "Failed to delete job"
+                                );
+                            }
                         }
+                        Err(JobError::Recoverable(e)) => {
+                            // Check if the error is due to an invalid session
+                            if let Some(BannerApiError::InvalidSession(_)) =
+                                e.downcast_ref::<BannerApiError>()
+                            {
+                                warn!(
+                                    worker_id = self.id,
+                                    job_id, "Invalid session detected. Forcing session refresh."
+                                );
+                            } else {
+                                error!(worker_id = self.id, job_id, error = ?e, "Failed to process job");
+                            }
 
-                        // Unlock the job so it can be retried
-                        if let Err(unlock_err) = self.unlock_job(job_id).await {
-                            error!(
-                                worker_id = self.id,
-                                job_id,
-                                ?unlock_err,
-                                "Failed to unlock job"
-                            );
+                            // Unlock the job so it can be retried
+                            if let Err(unlock_err) = self.unlock_job(job_id).await {
+                                error!(
+                                    worker_id = self.id,
+                                    job_id,
+                                    ?unlock_err,
+                                    "Failed to unlock job"
+                                );
+                            }
                         }
-                    } else {
-                        debug!(worker_id = self.id, job_id, "Job completed");
-                        // If successful, delete the job.
-                        if let Err(delete_err) = self.delete_job(job_id).await {
+                        Err(JobError::Unrecoverable(e)) => {
                             error!(
                                 worker_id = self.id,
                                 job_id,
-                                ?delete_err,
-                                "Failed to delete job"
+                                error = ?e,
+                                "Job corrupted, deleting"
                             );
+                            // Parse errors are unrecoverable - delete the job
+                            if let Err(delete_err) = self.delete_job(job_id).await {
+                                error!(
+                                    worker_id = self.id,
+                                    job_id,
+                                    ?delete_err,
+                                    "Failed to delete corrupted job"
+                                );
+                            }
                         }
                     }
                 }
@@ -109,79 +129,26 @@ impl Worker {
         Ok(job)
     }
 
-    async fn process_job(&self, job: ScrapeJob) -> Result<()> {
-        match job.target_type {
-            crate::data::models::TargetType::Subject => {
-                self.process_subject_job(&job.target_payload).await
-            }
-            _ => {
-                warn!(worker_id = self.id, job_id = job.id, "unhandled job type");
-                Ok(())
-            }
-        }
-    }
+    async fn process_job(&self, job: ScrapeJob) -> Result<(), JobError> {
+        // Convert the database job to our job type
+        let job_type = JobType::from_target_type_and_payload(job.target_type, job.target_payload)
+            .map_err(|e| JobError::Unrecoverable(anyhow::anyhow!(e)))?; // Parse errors are unrecoverable
 
-    async fn process_subject_job(&self, payload: &Value) -> Result<()> {
-        let subject_code = payload["subject"]
-            .as_str()
-            .ok_or_else(|| anyhow::anyhow!("Invalid subject payload"))?;
-        info!(
+        // Get the job implementation
+        let job_impl = job_type.as_job();
+
+        debug!(
             worker_id = self.id,
-            subject = subject_code,
-            "Scraping subject"
+            job_id = job.id,
+            description = job_impl.description(),
+            "Processing job"
         );
 
-        let term = Term::get_current().inner().to_string();
-        let query = SearchQuery::new().subject(subject_code).max_results(500);
-
-        let search_result = self
-            .banner_api
-            .search(&term, &query, "subjectDescription", false)
-            .await?;
-
-        if let Some(courses_from_api) = search_result.data {
-            info!(
-                worker_id = self.id,
-                subject = subject_code,
-                count = courses_from_api.len(),
-                "Found courses"
-            );
-            for course in courses_from_api {
-                self.upsert_course(&course).await?;
-            }
-        }
-
-        Ok(())
-    }
-
-    async fn upsert_course(&self, course: &Course) -> Result<()> {
-        sqlx::query(
-            r#"
-            INSERT INTO courses (crn, subject, course_number, title, term_code, enrollment, max_enrollment, wait_count, wait_capacity, last_scraped_at)
-            VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10)
-            ON CONFLICT (crn, term_code) DO UPDATE SET
-                subject = EXCLUDED.subject,
-                course_number = EXCLUDED.course_number,
-                title = EXCLUDED.title,
-                enrollment = EXCLUDED.enrollment,
-                max_enrollment = EXCLUDED.max_enrollment,
-                wait_count = EXCLUDED.wait_count,
-                wait_capacity = EXCLUDED.wait_capacity,
-                last_scraped_at = EXCLUDED.last_scraped_at
-            "#,
-        )
-        .bind(&course.course_reference_number)
-        .bind(&course.subject)
-        .bind(&course.course_number)
-        .bind(&course.course_title)
-        .bind(&course.term)
-        .bind(course.enrollment)
-        .bind(course.maximum_enrollment)
-        .bind(course.wait_count)
-        .bind(course.wait_capacity)
-        .bind(chrono::Utc::now())
-        .execute(&self.db_pool)
-        .await?;
+        // Process the job - API errors are recoverable
+        job_impl
+            .process(&self.banner_api, &self.db_pool)
+            .await
+            .map_err(JobError::Recoverable)?;
 
         Ok(())
     }

src/state.rs

@@ -3,46 +3,36 @@
 use crate::banner::BannerApi;
 use crate::banner::Course;
 use anyhow::Result;
-use redis::AsyncCommands;
-use redis::Client;
+use sqlx::PgPool;
 use std::sync::Arc;
 
 #[derive(Clone)]
 pub struct AppState {
     pub banner_api: Arc<BannerApi>,
-    pub redis: Arc<Client>,
+    pub db_pool: PgPool,
 }
 
 impl AppState {
-    pub fn new(
-        banner_api: Arc<BannerApi>,
-        redis_url: &str,
-    ) -> Result<Self, Box<dyn std::error::Error + Send + Sync>> {
-        let redis_client = Client::open(redis_url)?;
-
-        Ok(Self {
+    pub fn new(banner_api: Arc<BannerApi>, db_pool: PgPool) -> Self {
+        Self {
             banner_api,
-            redis: Arc::new(redis_client),
-        })
+            db_pool,
+        }
     }
 
-    /// Get a course by CRN with Redis cache fallback to Banner API
+    /// Get a course by CRN directly from Banner API
     pub async fn get_course_or_fetch(&self, term: &str, crn: &str) -> Result<Course> {
-        let mut conn = self.redis.get_multiplexed_async_connection().await?;
+        self.banner_api
+            .get_course_by_crn(term, crn)
+            .await?
+            .ok_or_else(|| anyhow::anyhow!("Course not found for CRN {crn}"))
+    }
 
-        let key = format!("class:{crn}");
-        if let Some(serialized) = conn.get::<_, Option<String>>(&key).await? {
-            let course: Course = serde_json::from_str(&serialized)?;
-            return Ok(course);
-        }
-
-        // Fallback: fetch from Banner API
-        if let Some(course) = self.banner_api.get_course_by_crn(term, crn).await? {
-            let serialized = serde_json::to_string(&course)?;
-            let _: () = conn.set(&key, serialized).await?;
-            return Ok(course);
-        }
-
-        Err(anyhow::anyhow!("Course not found for CRN {crn}"))
+    /// Get the total number of courses in the database
+    pub async fn get_course_count(&self) -> Result<i64> {
+        let count: (i64,) = sqlx::query_as("SELECT COUNT(*) FROM courses")
+            .fetch_one(&self.db_pool)
+            .await?;
+        Ok(count.0)
     }
 }

src/web/routes.rs

@@ -69,18 +69,8 @@ async fn status(State(_state): State<BannerState>) -> Json<Value> {
 async fn metrics(State(_state): State<BannerState>) -> Json<Value> {
     // For now, return basic metrics structure
     Json(json!({
-        "redis": {
-            "status": "connected",
-            "connected_clients": "TODO: implement client counting",
-            "used_memory": "TODO: implement memory tracking"
-        },
-        "cache": {
-            "courses": {
-                "count": "TODO: implement course counting"
-            },
-            "subjects": {
-                "count": "TODO: implement subject counting"
-            }
+        "banner_api": {
+            "status": "connected"
         },
         "timestamp": chrono::Utc::now().to_rfc3339()
     }))