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tutorial project for rust

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Peter Li 2026-02-07 10:30:57 -08:00
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[package]
name = "CurseTechnique"
version = "0.1.0"
edition = "2024"
[dependencies]
axum = "0.8.1"
chrono = { version = "0.4.40", features = ["clock"] }
rusqlite = { version = "0.31.0", features = ["bundled"] }
tokio = { version = "1.44.0", features = ["full"] }

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# CurseTechnique Codebase Walkthrough
This document is a practical map of the app, aimed at learning-oriented Rust reading.
## 1. High-level architecture
The app uses a lightweight 4-layer layout:
1. `src/main.rs` - startup and route wiring
2. `src/handlers.rs` - HTTP handlers and input validation
3. `src/db.rs` - SQLite queries and data structs
4. `src/views.rs` - HTML rendering (server-side string rendering)
The goal is to keep each file focused and easy to read without adding extra frameworks.
## 2. Request flow (end-to-end)
Example: open `GET /day/2026-02-07`
1. Route is defined in `src/main.rs` and points to `handlers::show_day_entries`.
2. `show_day_entries` in `src/handlers.rs` validates the date path param.
3. It calls `db::fetch_day_entries` in `src/db.rs` to load rows from SQLite.
4. It passes those rows to `views::render_day_page` in `src/views.rs`.
5. The rendered HTML is returned to the browser.
Example: submit add-entry form `POST /day/{date}/add`
1. Route points to `handlers::create_entry`.
2. Handler validates date and form fields (`name`, `calories`).
3. Handler calls `db::insert_entry`.
4. Handler redirects back to `/day/{date}`.
## 3. File-by-file reading guide
## `src/main.rs`
Read this file first. It is intentionally small.
- Creates data directory and opens SQLite DB.
- Calls DB init/seed helpers.
- Builds Axum router.
- Starts Tokio TCP listener.
If you ever wonder "where is this endpoint connected?", this file is the source of truth.
## `src/handlers.rs`
This is the HTTP boundary.
Core concepts here:
- `AppState` holds shared DB connection behind `Arc<Mutex<Connection>>`.
- Each handler receives typed route/form data.
- Handlers do three steps:
1. Validate input
2. Call DB function
3. Return HTML or redirect
Useful helper functions:
- `validate_date` ensures `YYYY-MM-DD` format.
- `parse_entry_form_fields` validates `name` + `calories`.
- `month_bounds` computes first/next month boundaries.
## `src/db.rs`
This file contains all SQL.
Data structs:
- `FoodEntry` represents one row.
- `DaySummary` represents aggregated values for calendar cards.
Functions are split by intent:
- Setup: `init_db`, `seed_db_if_empty`
- Reads: `fetch_month_summaries`, `fetch_day_entries`
- Writes: `insert_entry`, `update_entry`, `delete_entry`
If behavior looks wrong (totals, filtering, ordering), start debugging here.
## `src/views.rs`
This file builds HTML strings for SSR.
- `render_calendar_page` renders `/`.
- `render_day_page` renders `/day/{date}`.
- Small helpers reduce clutter:
- `render_day_card`
- `render_entry_rows`
- `entry_count_label`
- `escape_html`
Important: `escape_html` is used when rendering user-provided food names.
## 4. Key Rust patterns used
- `Result<T, E>` for explicit error handling.
- `?` operator to propagate errors.
- `Arc<Mutex<_>>` for shared mutable state across async handlers.
- Simple structs over tuple-heavy values for readability (`DaySummary`).
- Module organization (`mod db; mod handlers; mod views;`) to keep files focused.
## 5. How to add a feature safely
Use this checklist:
1. Add/adjust SQL function in `db.rs`.
2. Add or update handler logic in `handlers.rs`.
3. Update route wiring in `main.rs` if endpoint path changes.
4. Update HTML output/forms in `views.rs`.
5. Run:
- `cargo fmt`
- `cargo check`
## 6. Suggested beginner exercises
1. Add a "notes" text column to food entries.
2. Show count of entries in the day header.
3. Add confirmation step on delete (simple query param or separate page).
4. Add a helper in handlers to prevent editing future dates.
These exercises touch all 4 layers and are great practice for understanding the whole flow.

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use std::collections::HashMap;
use rusqlite::{Connection, params};
#[derive(Clone)]
/// A single food entry row from `food_entries`.
pub struct FoodEntry {
pub id: i64,
pub name: String,
pub calories: i64,
}
#[derive(Clone, Copy)]
/// Aggregated daily values used by the calendar grid.
pub struct DaySummary {
pub entry_count: i64,
pub total_calories: i64,
}
/// Creates tables/indexes if they do not already exist.
pub fn init_db(conn: &Connection) -> Result<(), rusqlite::Error> {
conn.execute_batch(
"CREATE TABLE IF NOT EXISTS food_entries (
id INTEGER PRIMARY KEY AUTOINCREMENT,
entry_date TEXT NOT NULL,
name TEXT NOT NULL,
calories INTEGER NOT NULL CHECK (calories >= 0),
created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
);
CREATE INDEX IF NOT EXISTS idx_food_entries_entry_date ON food_entries(entry_date);",
)?;
Ok(())
}
/// Placeholder seeding hook. Currently no-op unless you add seed inserts.
pub fn seed_db_if_empty(conn: &Connection) -> Result<(), rusqlite::Error> {
let count: i64 = conn.query_row("SELECT COUNT(*) FROM food_entries", [], |row| row.get(0))?;
if count > 0 {
return Ok(());
}
Ok(())
}
/// Returns one summary per date for the given half-open range [start_date, end_date).
pub fn fetch_month_summaries(
conn: &Connection,
start_date: &str,
end_date: &str,
) -> Result<HashMap<String, DaySummary>, rusqlite::Error> {
let mut statement = conn.prepare(
"SELECT entry_date, COUNT(*) as entry_count, SUM(calories) as total
FROM food_entries
WHERE entry_date >= ?1 AND entry_date < ?2
GROUP BY entry_date",
)?;
let mut rows = statement.query(params![start_date, end_date])?;
let mut totals = HashMap::<String, DaySummary>::new();
while let Some(row) = rows.next()? {
let date: String = row.get(0)?;
let entry_count: i64 = row.get(1)?;
let total_calories: i64 = row.get(2)?;
totals.insert(
date,
DaySummary {
entry_count,
total_calories,
},
);
}
Ok(totals)
}
/// Returns all entries for one day.
pub fn fetch_day_entries(conn: &Connection, date: &str) -> Result<Vec<FoodEntry>, rusqlite::Error> {
let mut statement = conn.prepare(
"SELECT id, name, calories
FROM food_entries
WHERE entry_date = ?1
ORDER BY id",
)?;
let iter = statement.query_map(params![date], |row| {
Ok(FoodEntry {
id: row.get(0)?,
name: row.get(1)?,
calories: row.get(2)?,
})
})?;
let mut entries = Vec::new();
for row in iter {
entries.push(row?);
}
Ok(entries)
}
/// Inserts one entry for a date.
pub fn insert_entry(
conn: &Connection,
date: &str,
name: &str,
calories: i64,
) -> Result<(), rusqlite::Error> {
conn.execute(
"INSERT INTO food_entries (entry_date, name, calories) VALUES (?1, ?2, ?3)",
params![date, name, calories],
)?;
Ok(())
}
/// Updates one entry if both `id` and `date` match.
pub fn update_entry(
conn: &Connection,
date: &str,
id: i64,
name: &str,
calories: i64,
) -> Result<(), rusqlite::Error> {
conn.execute(
"UPDATE food_entries
SET name = ?1, calories = ?2
WHERE id = ?3 AND entry_date = ?4",
params![name, calories, id, date],
)?;
Ok(())
}
/// Deletes one entry if both `id` and `date` match.
pub fn delete_entry(conn: &Connection, date: &str, id: i64) -> Result<(), rusqlite::Error> {
conn.execute(
"DELETE FROM food_entries WHERE id = ?1 AND entry_date = ?2",
params![id, date],
)?;
Ok(())
}

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use std::collections::HashMap;
use std::sync::Arc;
use axum::extract::{Form, Path, State};
use axum::http::StatusCode;
use axum::response::{Html, Redirect};
use chrono::{Datelike, Local, NaiveDate};
use rusqlite::Connection;
use tokio::sync::Mutex;
use crate::db;
use crate::views::{self, CalendarCell, DayCard};
type AppError = (StatusCode, String);
#[derive(Clone)]
/// Shared application state injected into each handler.
pub struct AppState {
pub db: Arc<Mutex<Connection>>,
}
/// GET `/` - calendar overview for the current month.
pub async fn show_calendar(State(state): State<AppState>) -> Result<Html<String>, AppError> {
let today = Local::now().date_naive();
let (first_day, first_of_next_month, days_in_month) = month_bounds(today)?;
let totals = {
let db_conn = state.db.lock().await;
db::fetch_month_summaries(
&db_conn,
&first_day.format("%Y-%m-%d").to_string(),
&first_of_next_month.format("%Y-%m-%d").to_string(),
)
.map_err(internal_error)?
};
let mut cells = Vec::with_capacity(42);
// Calendar starts on Sunday, so pad blank cells before day 1.
let first_weekday = first_day.weekday().num_days_from_sunday() as usize;
for _ in 0..first_weekday {
cells.push(CalendarCell::Padding);
}
for day_num in 1..=days_in_month {
if let Some(date) = NaiveDate::from_ymd_opt(today.year(), today.month(), day_num as u32) {
let date_text = date.format("%Y-%m-%d").to_string();
let summary = totals.get(&date_text);
cells.push(CalendarCell::Day(DayCard {
date_text,
day_num: day_num as u32,
total: summary.map(|s| s.total_calories).unwrap_or(0),
entry_count: summary.map(|s| s.entry_count).unwrap_or(0),
is_today: date == today,
is_future: date > today,
}));
}
}
// Pad trailing cells so the grid always ends on Saturday.
let total_cells = first_weekday + days_in_month as usize;
let tail_padding = (7 - (total_cells % 7)) % 7;
for _ in 0..tail_padding {
cells.push(CalendarCell::Padding);
}
Ok(Html(views::render_calendar_page(
&today.format("%B %Y").to_string(),
&cells,
)))
}
/// GET `/day/{date}` - list/edit entries for one day.
pub async fn show_day_entries(
State(state): State<AppState>,
Path(date_text): Path<String>,
) -> Result<Html<String>, AppError> {
validate_date(&date_text)?;
let entries = {
let db_conn = state.db.lock().await;
db::fetch_day_entries(&db_conn, &date_text).map_err(internal_error)?
};
Ok(Html(views::render_day_page(&date_text, &entries)))
}
/// POST `/day/{date}/add` - create a new entry.
pub async fn create_entry(
State(state): State<AppState>,
Path(date_text): Path<String>,
Form(form): Form<HashMap<String, String>>,
) -> Result<Redirect, AppError> {
validate_date(&date_text)?;
let (name, calories) = parse_entry_form_fields(&form)?;
let db_conn = state.db.lock().await;
db::insert_entry(&db_conn, &date_text, &name, calories).map_err(internal_error)?;
Ok(Redirect::to(&format!("/day/{}", date_text)))
}
/// POST `/day/{date}/entry/{id}/update` - edit an existing entry.
pub async fn edit_entry(
State(state): State<AppState>,
Path((date_text, id)): Path<(String, i64)>,
Form(form): Form<HashMap<String, String>>,
) -> Result<Redirect, AppError> {
validate_date(&date_text)?;
let (name, calories) = parse_entry_form_fields(&form)?;
let db_conn = state.db.lock().await;
db::update_entry(&db_conn, &date_text, id, &name, calories).map_err(internal_error)?;
Ok(Redirect::to(&format!("/day/{}", date_text)))
}
/// POST `/day/{date}/entry/{id}/delete` - remove an entry.
pub async fn remove_entry(
State(state): State<AppState>,
Path((date_text, id)): Path<(String, i64)>,
) -> Result<Redirect, AppError> {
validate_date(&date_text)?;
let db_conn = state.db.lock().await;
db::delete_entry(&db_conn, &date_text, id).map_err(internal_error)?;
Ok(Redirect::to(&format!("/day/{}", date_text)))
}
fn validate_date(date_text: &str) -> Result<(), AppError> {
NaiveDate::parse_from_str(date_text, "%Y-%m-%d")
.map(|_| ())
.map_err(|_| {
(
StatusCode::BAD_REQUEST,
"Date must be YYYY-MM-DD".to_string(),
)
})
}
fn parse_entry_form_fields(form: &HashMap<String, String>) -> Result<(String, i64), AppError> {
let name = form.get("name").map(|v| v.trim()).unwrap_or("");
let calories = form
.get("calories")
.ok_or((StatusCode::BAD_REQUEST, "Calories are required".to_string()))?
.parse::<i64>()
.map_err(|_| {
(
StatusCode::BAD_REQUEST,
"Calories must be a number".to_string(),
)
})?;
if name.is_empty() {
return Err((StatusCode::BAD_REQUEST, "Name is required".to_string()));
}
if calories < 0 {
return Err((StatusCode::BAD_REQUEST, "Calories must be >= 0".to_string()));
}
Ok((name.to_string(), calories))
}
fn month_bounds(today: NaiveDate) -> Result<(NaiveDate, NaiveDate, i64), AppError> {
let first_day = NaiveDate::from_ymd_opt(today.year(), today.month(), 1).ok_or((
StatusCode::INTERNAL_SERVER_ERROR,
"Invalid date".to_string(),
))?;
let (next_year, next_month) = if today.month() == 12 {
(today.year() + 1, 1)
} else {
(today.year(), today.month() + 1)
};
let first_of_next_month = NaiveDate::from_ymd_opt(next_year, next_month, 1).ok_or((
StatusCode::INTERNAL_SERVER_ERROR,
"Invalid date".to_string(),
))?;
let days_in_month = (first_of_next_month - first_day).num_days();
Ok((first_day, first_of_next_month, days_in_month))
}
fn internal_error(error: rusqlite::Error) -> AppError {
(
StatusCode::INTERNAL_SERVER_ERROR,
format!("Database error: {}", error),
)
}

48
src/main.rs Normal file
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@ -0,0 +1,48 @@
mod db;
mod handlers;
mod views;
use std::fs;
use std::sync::Arc;
use axum::Router;
use axum::routing::{get, post};
use rusqlite::Connection;
use tokio::sync::Mutex;
use crate::handlers::AppState;
const DB_DIR: &str = "data";
const DB_PATH: &str = "data/app.db";
const LISTEN_ADDR: &str = "127.0.0.1:3000";
#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
fs::create_dir_all(DB_DIR)?;
let conn = Connection::open(DB_PATH)?;
db::init_db(&conn)?;
db::seed_db_if_empty(&conn)?;
let state = AppState {
db: Arc::new(Mutex::new(conn)),
};
// Route wiring stays here so `main` is the single startup overview.
let app = Router::new()
.route("/", get(handlers::show_calendar))
.route("/day/{date}", get(handlers::show_day_entries))
.route("/day/{date}/add", post(handlers::create_entry))
.route("/day/{date}/entry/{id}/update", post(handlers::edit_entry))
.route(
"/day/{date}/entry/{id}/delete",
post(handlers::remove_entry),
)
.with_state(state);
let listener = tokio::net::TcpListener::bind(LISTEN_ADDR).await?;
println!("Listening on http://{}", LISTEN_ADDR);
axum::serve(listener, app).await?;
Ok(())
}

248
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use crate::db::FoodEntry;
pub struct DayCard {
pub date_text: String,
pub day_num: u32,
pub total: i64,
pub entry_count: i64,
pub is_today: bool,
pub is_future: bool,
}
pub enum CalendarCell {
Padding,
Day(DayCard),
}
/// Renders the month calendar page.
pub fn render_calendar_page(month_label: &str, cells: &[CalendarCell]) -> String {
let mut items = String::new();
for cell in cells {
match cell {
CalendarCell::Padding => items.push_str(
"<div class=\"h-32 rounded-2xl border border-dashed border-slate-300/80 bg-white/40\" aria-hidden=\"true\"></div>",
),
CalendarCell::Day(day) => items.push_str(&render_day_card(day)),
}
}
format!(
"<!doctype html>
<html>
<head>
<meta charset=\"utf-8\" />
<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\" />
<title>Hello Calories</title>
<script src=\"https://cdn.tailwindcss.com\"></script>
</head>
<body class=\"min-h-screen bg-gradient-to-br from-slate-100 via-white to-cyan-100 text-slate-900\">
<main class=\"mx-auto max-w-6xl px-4 py-10 sm:px-6 lg:px-8\">
<header class=\"mb-8 rounded-3xl border border-slate-200/80 bg-white/80 p-6 shadow-sm backdrop-blur\">
<p class=\"text-xs uppercase tracking-[0.22em] text-slate-500\">Calorie Tracker</p>
<h1 class=\"mt-2 text-3xl font-bold tracking-tight sm:text-4xl\">{}</h1>
<p class=\"mt-3 text-sm text-slate-600\">Click any day to inspect all logged food entries.</p>
</header>
<section class=\"rounded-3xl border border-slate-200/80 bg-white/80 p-4 shadow-sm backdrop-blur sm:p-6\">
<div class=\"overflow-x-auto\">
<div class=\"min-w-[720px]\">
<div class=\"mb-4 grid grid-cols-7 gap-2\">
<div class=\"text-center text-xs font-semibold uppercase tracking-wide text-slate-500\">Sun</div>
<div class=\"text-center text-xs font-semibold uppercase tracking-wide text-slate-500\">Mon</div>
<div class=\"text-center text-xs font-semibold uppercase tracking-wide text-slate-500\">Tue</div>
<div class=\"text-center text-xs font-semibold uppercase tracking-wide text-slate-500\">Wed</div>
<div class=\"text-center text-xs font-semibold uppercase tracking-wide text-slate-500\">Thu</div>
<div class=\"text-center text-xs font-semibold uppercase tracking-wide text-slate-500\">Fri</div>
<div class=\"text-center text-xs font-semibold uppercase tracking-wide text-slate-500\">Sat</div>
</div>
<div class=\"grid grid-cols-7 gap-2\">
{}
</div>
</div>
</div>
</section>
</main>
</body>
</html>",
month_label, items
)
}
/// Renders the daily page with add/edit/delete forms.
pub fn render_day_page(date_text: &str, entries: &[FoodEntry]) -> String {
let daily_total: i64 = entries.iter().map(|entry| entry.calories).sum();
let rows = render_entry_rows(date_text, entries);
format!(
"<!doctype html>
<html>
<head>
<meta charset=\"utf-8\" />
<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\" />
<title>Day Entries</title>
<script src=\"https://cdn.tailwindcss.com\"></script>
</head>
<body class=\"min-h-screen bg-gradient-to-b from-slate-100 via-white to-cyan-100 text-slate-900\">
<main class=\"mx-auto max-w-3xl px-4 py-10 sm:px-6 lg:px-8\">
<a href=\"/\" class=\"inline-flex items-center gap-2 text-sm font-medium text-slate-600 transition hover:text-slate-900\">
<span>&larr;</span>
<span>Back to calendar</span>
</a>
<section class=\"mt-4 rounded-3xl border border-slate-200/80 bg-white/80 p-6 shadow-sm backdrop-blur\">
<h1 class=\"text-3xl font-bold tracking-tight\">{}</h1>
<p class=\"mt-3 inline-flex items-center rounded-full bg-emerald-100 px-3 py-1 text-sm font-semibold text-emerald-900\">
Daily total: {} cal
</p>
<div class=\"mt-5 rounded-2xl border border-slate-200 bg-slate-50 p-4\">
<h2 class=\"text-sm font-semibold uppercase tracking-wide text-slate-600\">Add entry</h2>
<form method=\"post\" action=\"/day/{}/add\" class=\"mt-3 grid gap-2 sm:grid-cols-3\">
<input
type=\"text\"
name=\"name\"
placeholder=\"Food name\"
required
class=\"sm:col-span-2 w-full rounded-lg border border-slate-300 bg-white px-3 py-2 text-sm text-slate-900 focus:border-teal-500 focus:outline-none\"
/>
<input
type=\"number\"
name=\"calories\"
placeholder=\"Calories\"
min=\"0\"
required
class=\"w-full rounded-lg border border-slate-300 bg-white px-3 py-2 text-sm text-slate-900 focus:border-teal-500 focus:outline-none\"
/>
<div class=\"sm:col-span-3\">
<button type=\"submit\" class=\"rounded-lg bg-slate-900 px-4 py-2 text-sm font-semibold text-white hover:bg-slate-700\">Add entry</button>
</div>
</form>
</div>
<div class=\"mt-5 overflow-hidden rounded-2xl border border-slate-200\">
<table class=\"w-full border-collapse\">
<thead class=\"bg-slate-50 text-left text-xs uppercase tracking-wide text-slate-500\">
<tr><th class=\"px-5 py-3\">Entry</th><th class=\"px-5 py-3\">Calories</th></tr>
</thead>
<tbody class=\"bg-white\">{}</tbody>
</table>
</div>
</section>
</main>
</body>
</html>",
date_text, daily_total, date_text, rows
)
}
fn render_day_card(day: &DayCard) -> String {
let entry_line = entry_count_label(day.entry_count);
if day.is_future {
return format!(
"<div class=\"h-32 rounded-2xl border border-slate-200 bg-slate-100/80 p-3 opacity-65\">
<div class=\"flex items-start justify-between\">
<span class=\"text-sm font-semibold text-slate-500\">{date}</span>
<span class=\"rounded-full bg-slate-400 px-2 py-0.5 text-xs font-semibold text-white\">{day_num}</span>
</div>
<div class=\"mt-6\">
<p class=\"text-xl font-bold text-slate-500\">{total} cal</p>
<p class=\"text-xs text-slate-500\">{entry_line}</p>
<p class=\"mt-1 text-[11px] uppercase tracking-wide text-slate-400\">Future</p>
</div>
</div>",
date = day.date_text,
day_num = day.day_num,
total = day.total,
entry_line = entry_line
);
}
let base_class = if day.is_today {
"group block h-32 rounded-2xl border border-teal-400 bg-teal-50 p-3 transition hover:-translate-y-0.5 hover:shadow-md"
} else {
"group block h-32 rounded-2xl border border-slate-200 bg-white p-3 transition hover:-translate-y-0.5 hover:shadow-md"
};
format!(
"<a class=\"{class}\" href=\"/day/{date}\">
<div class=\"flex items-start justify-between\">
<span class=\"text-sm font-semibold text-slate-500\">{date}</span>
<span class=\"rounded-full bg-slate-900 px-2 py-0.5 text-xs font-semibold text-white\">{day_num}</span>
</div>
<div class=\"mt-6\">
<p class=\"text-xl font-bold text-slate-900\">{total} cal</p>
<p class=\"text-xs text-slate-600\">{entry_line}</p>
</div>
</a>",
class = base_class,
date = day.date_text,
day_num = day.day_num,
total = day.total,
entry_line = entry_line
)
}
fn escape_html(text: &str) -> String {
text.replace('&', "&amp;")
.replace('<', "&lt;")
.replace('>', "&gt;")
.replace('\"', "&quot;")
.replace('\'', "&#39;")
}
fn entry_count_label(entry_count: i64) -> String {
if entry_count == 0 {
"No entries".to_string()
} else if entry_count == 1 {
"1 entry".to_string()
} else {
format!("{} entries", entry_count)
}
}
fn render_entry_rows(date_text: &str, entries: &[FoodEntry]) -> String {
let mut rows = String::new();
if entries.is_empty() {
rows.push_str(
"<tr><td colspan=\"2\" class=\"px-5 py-8 text-center text-slate-500\">No entries yet for this day.</td></tr>",
);
return rows;
}
for entry in entries {
rows.push_str(&format!(
"<tr class=\"border-t border-slate-200 align-top\">
<td class=\"px-5 py-3\">
<form method=\"post\" action=\"/day/{date}/entry/{id}/update\" class=\"grid gap-2 md:grid-cols-2\">
<input
type=\"text\"
name=\"name\"
value=\"{name}\"
required
class=\"w-full rounded-lg border border-slate-300 bg-white px-3 py-2 text-sm text-slate-900 focus:border-teal-500 focus:outline-none\"
/>
<input
type=\"number\"
name=\"calories\"
value=\"{calories}\"
min=\"0\"
required
class=\"w-full rounded-lg border border-slate-300 bg-white px-3 py-2 text-sm text-slate-900 focus:border-teal-500 focus:outline-none\"
/>
<div class=\"md:col-span-2\">
<button type=\"submit\" class=\"rounded-lg bg-teal-700 px-3 py-1.5 text-xs font-semibold text-white hover:bg-teal-800\">Save</button>
</div>
</form>
<form method=\"post\" action=\"/day/{date}/entry/{id}/delete\" class=\"mt-2\">
<button type=\"submit\" class=\"rounded-lg border border-rose-200 bg-rose-50 px-3 py-1.5 text-xs font-semibold text-rose-700 hover:bg-rose-100\">Delete</button>
</form>
</td>
<td class=\"px-5 py-3 font-semibold text-slate-900\">{calories} cal</td>
</tr>",
date = date_text,
id = entry.id,
name = escape_html(&entry.name),
calories = entry.calories
));
}
rows
}