commit c6a49dc6e8a4c6dd4f7fc9a28aab1fdb80604132
Author: Greg Sarjeant <1686767+gsarjeant@users.noreply.github.com>
Date:   Mon May 26 10:41:14 2025 -0400

    Initial commit

diff --git a/.gitignore b/.gitignore
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+++ b/.gitignore
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+*.sqlite
+*.txt
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diff --git a/README.md b/README.md
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+++ b/README.md
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+# tkr
+
+A bare-bones status feed for self-hosted personal websites.
+
+Currently very much a work in progress, but it's baically functional.
+
+## How it works
+
+Deploy the `/tkr` directory to a web server that supports php. It will work either as the root of a (sub)domain (e.g. tky.mydomain.com) or if served from a subdirectory (e.g. mydomain.com/tkr).
+
+If you serve it from a subdirectory, set the value of `$basePath` in `/app/config.php` to the subdirectory name, excluding the trailing slash (e.g. `/tkr`)
+
+It provides an rss feed at `/rss` relative to where it's being served (e.g. `/tkr/rss` if served from `/tkr/`). Each rss entry links to an individual post (which I call "ticks").
+
+## Serving
+
+The document root should be `/PATH/TO/tkr/public`. This will ensure that only the files that need to be accessible from the internet are served by your web server.
+
+## Storage
+
+Ticks are stored in files on the filesystem under `/tkr/ticks`. This directory must be writable by the web server user and so SHOULD NOT be served by the web server. If you set your document root to `/tkr/public/`, then you'll be fine.
+
+The file structure is `YYYY/MM/DD.txt`. That is, each day's ticks are located in a file whose full path is `/tkr/ticks/YEAR/MONTH/DAY.txt`. This is to prevent any single file from getting too large.
+
+Each entry takes the form `TIMESTAMP|TICK`, where `TIMESTAMP` is the time that the entry was made and `TICK` is the text of the entry.
+
+For illustration, here's a sample from the file `/tkr/ticks/2025/05/25` on my test system.
+
+```sh
+# cat /tkr/ticks/2025/05/25.txt
+23:27:37|some stuff
+23:27:45|some more, stuff
+```
+
+## Initial config
+
+I'll write this up when I improve it.
+
+## Sample images
+
+Logged out
+
+![tkr homepage - logged out](https://subcultureofone.org/images/tkr-logged-out.png)
+
+Logged in
+
+![tkr homepage - logged in](https://subcultureofone.org/images/tkr-logged-in.png)
+
+RSS
+
+![tkr rss feed](https://subcultureofone.org/images/tkr-rss.png)
+
+Single tick
+
+![tkr single post](https://subcultureofone.org/images/tkr-single.png)
+
+## TODO
+
+* An actual setup script
+* Validate CSRF token on tick submission
+* Let people set the time zone for ticks
+* Support basic custom styling
+* Do that config improvement I implied in the previous section
+* See if I can get individual ticks to resolve as urls (e.g. /2025/05/26/00/12) rather than doing the query string thing
+* Clean up the nginx configs
+* Add an .htaccess example
+* Maybe h-feed or JSON feed?
+* Microformat support?
+* A little more profile info?
+* Probably a bunch of other stuff I'm not thinking of
\ No newline at end of file
diff --git a/docker-compose.yml b/docker-compose.yml
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--- /dev/null
+++ b/docker-compose.yml
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+services:
+    web:
+        image: nginx:latest
+        ports:
+            - "80:80"
+        volumes:
+            - ./tkr-nginx-folder.conf:/etc/nginx/conf.d/default.conf
+            - ./tkr:/tkr
+    php:
+        image: php:fpm
+        volumes:
+            - ./tkr:/tkr
\ No newline at end of file
diff --git a/tkr-nginx-folder.conf b/tkr-nginx-folder.conf
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--- /dev/null
+++ b/tkr-nginx-folder.conf
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+server {
+    listen 80 default_server;
+    root /usr/share/nginx/html;
+
+    location ^~ /tkr {
+        index index.php;
+        alias /tkr/public;
+
+        #location ~ "^/tkr/([0-9]{4}/[0-9]{2}/[0-9]{2}/[0-9]{2}/[0-9]{2}/[0-9]{2})$" {
+        #    rewrite "^/tkr/([0-9/]{19})$ /tkr/tick.php?path=$1" break;
+        #}
+
+        location ~ ^/tkr(/.+\.php)$ {
+            fastcgi_pass php:9000;
+            include fastcgi_params;
+            fastcgi_param SCRIPT_FILENAME /tkr/public/$1;
+            fastcgi_param SCRIPT_NAME $uri;
+            fastcgi_param REQUEST_METHOD  $request_method;
+            fastcgi_param CONTENT_TYPE    $content_type;
+            fastcgi_param CONTENT_LENGTH  $content_length;
+        }
+    }
+
+    # Deny anything else
+    location / {
+        try_files $uri $uri/ =404;
+    }
+
+    # Deny access to hidden or stray files
+    location ~* \.(htaccess|env|ini|log|bak)$ {
+        deny all;
+    }
+}
\ No newline at end of file
diff --git a/tkr-nginx.conf b/tkr-nginx.conf
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--- /dev/null
+++ b/tkr-nginx.conf
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+server {
+    listen 80 default_server;
+    root /app/public;
+
+    index index.php index.html index.htm;
+
+    location ~ \.php$ {
+        fastcgi_pass php:9000;
+        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+        fastcgi_param REQUEST_METHOD  $request_method;
+        fastcgi_param CONTENT_TYPE    $content_type;
+        fastcgi_param CONTENT_LENGTH  $content_length;
+        include fastcgi_params;     
+    }
+
+    location / {
+        try_files $uri $uri/ =404;
+    }
+
+    location ~* \.(htaccess|env|ini|log|bak)$ {
+        deny all;
+    }
+} 
\ No newline at end of file
diff --git a/tkr/config.php b/tkr/config.php
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+++ b/tkr/config.php
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+<?php
+$dbLocation = __DIR__ . '/db/tkr.sqlite';
+$tickLocation = __DIR__ . '/ticks';
+$basePath = '/tkr';
+
+try {
+    $pdo = new PDO("sqlite:$dbLocation");
+    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+    $pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
+} catch (PDOException $e) {
+    die("Database connection failed: " . $e->getMessage());
+}
diff --git a/tkr/create_db.php b/tkr/create_db.php
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--- /dev/null
+++ b/tkr/create_db.php
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+<?php
+// TODO: Replace this whole thing with a setup.php
+
+function prompt($prompt) {
+    echo $prompt;
+    return trim(fgets(STDIN));
+}
+
+function promptSilent($prompt = "Enter Password: ") {
+    if (strncasecmp(PHP_OS, 'WIN', 3) === 0) {
+        // Windows doesn't support shell-based hidden input
+        echo "Warning: Password input not hidden on Windows.\n";
+        return prompt($prompt);
+    } else {
+        // Use shell to disable echo for password input
+        echo $prompt;
+        system('stty -echo');
+        $password = rtrim(fgets(STDIN), "\n");
+        system('stty echo');
+        echo "\n";
+        return $password;
+    }
+}
+
+$dbFile = __DIR__ . '/tkr.sqlite';
+
+try {
+    $pdo = new PDO("sqlite:$dbFile");
+    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+} catch (PDOException $e) {
+    die("Could not connect to DB: " . $e->getMessage() . "\n");
+}
+
+$pdo->exec("CREATE TABLE IF NOT EXISTS user (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    username TEXT UNIQUE NOT NULL,
+    password_hash TEXT NOT NULL
+)");
+
+$username = prompt("Enter username: ");
+$password = promptSilent("Enter password: ");
+$confirm  = promptSilent("Confirm password: ");
+
+if ($password !== $confirm) {
+    die("Error: Passwords do not match.\n");
+}
+
+$passwordHash = password_hash($password, PASSWORD_DEFAULT);
+
+try {
+    $stmt = $pdo->prepare("INSERT INTO user(username, password_hash) VALUES (?, ?)");
+    $stmt->execute([$username, $passwordHash]);
+    echo "User '$username' created successfully.\n";
+} catch (PDOException $e) {
+    echo "Failed to create user: " . $e->getMessage() . "\n";
+}
diff --git a/tkr/db/.gitkeep b/tkr/db/.gitkeep
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index 0000000..e69de29
diff --git a/tkr/public/index.php b/tkr/public/index.php
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--- /dev/null
+++ b/tkr/public/index.php
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+<?php
+define('APP_ROOT', realpath(__DIR__ . '/../'));
+define('ITEMS_PER_PAGE', 25);
+
+require APP_ROOT . '/config.php';
+require APP_ROOT . '/session.php';
+require_once APP_ROOT . '/stream_ticks.php';
+
+$page = isset($_GET['page']) ? max(1, (int)$_GET['page']) : 1;
+$limit = ITEMS_PER_PAGE;
+$offset = ($page - 1) * $limit;
+
+$ticks = iterator_to_array(stream_ticks($tickLocation, $limit, $offset));
+?>
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>My ticker</title>
+        <style>
+            body { font-family: sans-serif; margin: 2em; }
+            .tick { margin-bottom: 1em; }
+            .ticktime { color: gray; font-size: 0.9em; }
+            .ticktext {color: black; font-size: 1.0em; }
+            .pagination a { margin: 0 5px; text-decoration: none; }
+        </style>
+    </head>
+    <body>
+        <h2>Welcome! Here's what's ticking.</h2>
+
+<?php foreach ($ticks as $tick): ?>
+        <div class="tick">
+            <spam class="ticktime"><?= $tick['timestamp'] ?></span>
+            <span class="ticktext"><?= $tick['tick'] ?></spam>
+        </div>
+<?php endforeach; ?>
+  
+    <div class="pagination">
+
+<?php if ($page > 1): ?>
+        <a href="?page=<?= $page - 1 ?>">&laquo; Newer</a>
+<?php endif; ?>
+
+<?php if (count($ticks) === $limit): ?>
+        <a href="?page=<?= $page + 1 ?>">Older &raquo;</a>
+<?php endif; ?>
+    </div>
+
+<?php if (!$isLoggedIn): ?>
+    <p><a href="<?= $basePath ?>/login.php">Login</a></p>
+<?php else: ?>
+    <form action="save_tick.php" method="post">
+        <input type="hidden" name="csrf_token" value="<?= htmlspecialchars($_SESSION['csrf_token']) ?>">
+        <label for="tick">What's ticking?</label>
+        <input name="tick" id="tick" type="text">
+  
+        <button type="submit">Tick</button>
+    </form>
+    <p><a href="<?= $basePath ?>/logout.php">Logout</a> <?= htmlspecialchars($_SESSION['username']) ?> </p>
+<?php endif; ?>
+</body>
+</html>
diff --git a/tkr/public/login.php b/tkr/public/login.php
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--- /dev/null
+++ b/tkr/public/login.php
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+<?php
+define('APP_ROOT', realpath(__DIR__ . '/../'));
+
+require APP_ROOT . '/config.php';
+require APP_ROOT . '/session.php';
+
+$error = '';
+
+if ($_SERVER['REQUEST_METHOD'] === 'POST') {
+    if (!validateCsrfToken($_POST['csrf_token'])) {
+        die('Invalid CSRF token');
+    }
+
+    $username = $_POST['username'] ?? '';
+    $password = $_POST['password'] ?? '';
+
+    $stmt = $pdo->prepare("SELECT id, username, password_hash FROM user WHERE username = ?");
+    $stmt->execute([$username]);
+    $user = $stmt->fetch();
+
+    if ($user && password_verify($password, $user['password_hash'])) {
+        session_regenerate_id(true);
+        $_SESSION['user_id'] = $user['id'];
+        $_SESSION['username'] = $user['username'];
+        header('Location: ' . $basePath . '/');
+        exit;
+    } else {
+        $error = 'Invalid username or password';
+    }
+}
+
+$csrf_token = generateCsrfToken();
+?>
+
+<!DOCTYPE html>
+<html>
+    <head><title>Login</title></head>
+    <body>
+    <h2>Login</h2>
+<?php if ($error): ?>
+    <p style="color:red"><?=  htmlspecialchars($error) ?></p>
+<?php endif; ?>
+    <form method="post" action="<?= $basePath ?>/login.php">
+        <input type="hidden" name="csrf_token" value="<?= htmlspecialchars($csrf_token) ?>">
+        <label>Username: <input type="text" name="username" required></label><br>
+        <label>Password: <input type="password" name="password" required></label><br>
+        <button type="submit">Login</button>
+    </form>
+    </body>
+</html>
diff --git a/tkr/public/logout.php b/tkr/public/logout.php
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+++ b/tkr/public/logout.php
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+<?php
+define('APP_ROOT', realpath(__DIR__ . '/../'));
+
+require APP_ROOT . '/config.php';
+require APP_ROOT . '/session.php';
+
+$_SESSION = [];
+session_destroy();
+
+header('Location: ' . $basePath . '/');
+exit;
\ No newline at end of file
diff --git a/tkr/public/rss/index.php b/tkr/public/rss/index.php
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--- /dev/null
+++ b/tkr/public/rss/index.php
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+<?php
+define('APP_ROOT', realpath(__DIR__ . '/../../'));
+define('ITEMS_PER_PAGE', 25);
+
+require APP_ROOT . '/config.php';
+require_once APP_ROOT . '/stream_ticks.php';
+
+header('Content-Type: application/rss+xml; charset=utf-8');
+
+$ticks = iterator_to_array(stream_ticks($tickLocation, ITEMS_PER_PAGE));
+
+echo '<?xml version="1.0" encoding="UTF-8"?>' . "\n";
+?>
+<rss version="2.0">
+<channel>
+    <title>My tkr</title>
+    <link rel="alternate" type="application/rss+xml" title="Tick RSS" href="/tkr/rss/">
+    <description>My tkr</description>
+    <language>en-us</language>
+    <lastBuildDate><?php echo date(DATE_RSS); ?></lastBuildDate>
+
+<?php foreach ($ticks as $tick):
+    [$date, $time] = explode(' ', $tick['timestamp']);
+    $dateParts = explode('-', $date);
+    $timeParts = explode(':', $time);
+
+    [$year, $month, $day] = $dateParts;
+    [$hour, $minute, $second] = $timeParts;
+
+    $tickPath = "$year/$month/$day/$hour/$minute/$second";
+?>
+    
+    <item>
+        <title><?php echo htmlspecialchars(date(DATE_RFC7231, strtotime($tick['timestamp']))); ?></title>
+        <link><?php echo htmlspecialchars("$basePath/tick.php?path=$tickPath"); ?></link>
+        <description><?php echo htmlspecialchars($tick['tick']); ?></description>
+        <pubDate><?php echo date(DATE_RSS, strtotime($tick['timestamp'])); ?></pubDate>
+        <guid><?php echo htmlspecialchars($tickPath); ?></guid>
+    </item>
+    <?php endforeach; ?>
+
+</channel>
+</rss>
diff --git a/tkr/public/save_tick.php b/tkr/public/save_tick.php
new file mode 100644
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--- /dev/null
+++ b/tkr/public/save_tick.php
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+<?php
+define('APP_ROOT', realpath(__DIR__ . '/../'));
+
+require APP_ROOT . '/config.php';
+require APP_ROOT . '/session.php';
+
+// ticks must be sent via POST
+if ($_SERVER['REQUEST_METHOD'] === 'POST' and isset($_POST['tick'])) {
+    // csrf check
+    if (!validateCsrfToken($_POST['csrf_token'])) {
+        die('Invalid CSRF token');
+    }
+
+    $tick = htmlspecialchars($_POST['tick'], ENT_QUOTES | ENT_HTML5, 'UTF-8');
+} else {
+    // just go back to the index
+    header('Location: index.php');
+    exit;
+}
+
+# write the tick to a new entry 
+$date = new DateTime();
+
+$year = $date->format('Y');
+$month = $date->format('m');
+$day = $date->format('d');
+$time = $date->format('H:i:s');
+
+// build the full path to the tick file
+$dir = "$tickLocation/$year/$month";
+$filename = "$dir/$day.txt";
+
+// create the directory if it doesn't exist
+if (!is_dir($dir)) {
+    mkdir($dir, 0770, true);
+}
+
+// write the tick to the file (the file will be created if it doesn't exist)
+$content = $time . "|" . $tick . "\n";
+file_put_contents($filename, $content, FILE_APPEND);
+
+// go back to the index and show the latest tick
+header('Location: index.php');
+exit;
\ No newline at end of file
diff --git a/tkr/public/tick.php b/tkr/public/tick.php
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--- /dev/null
+++ b/tkr/public/tick.php
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+<?php
+require '/app/config.php';
+
+$path = $_GET['path'] ?? '';
+$parts = explode('/', $path);
+
+if (count($parts) !== 6) {
+    http_response_code(400);
+    echo "Invalid tick path.";
+    exit;
+}
+
+[$y, $m, $d, $H, $i, $s] = $parts;
+$timestamp = "$H:$i:$s";
+$file = "$tickLocation/$y/$m/$d.txt";
+
+if (!file_exists($file)) {
+    http_response_code(404);
+    echo "Tick not found.";
+    exit;
+}
+
+$lines = file($file, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
+foreach ($lines as $line) {
+    if (str_starts_with($line, $timestamp)) {
+        echo "<h1>Tick from $timestamp on $y-$m-$d</h1>";
+        echo "<p>" . htmlspecialchars(explode('|', $line)[1]) . "</p>";
+        exit;
+    }
+}
+
+http_response_code(404);
+echo "Tick not found.";
diff --git a/tkr/session.php b/tkr/session.php
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--- /dev/null
+++ b/tkr/session.php
@@ -0,0 +1,17 @@
+<?php
+if (session_status() === PHP_SESSION_NONE) {
+    session_start();
+}
+
+$isLoggedIn = isset($_SESSION['username']);
+
+function generateCsrfToken() {
+    if (empty($_SESSION['csrf_token'])) {
+        $_SESSION['csrf_token'] = bin2hex(random_bytes(32));
+    }
+    return $_SESSION['csrf_token'];
+}
+
+function validateCsrfToken($token) {
+    return hash_equals($_SESSION['csrf_token'], $token);
+}
diff --git a/tkr/stream_ticks.php b/tkr/stream_ticks.php
new file mode 100644
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--- /dev/null
+++ b/tkr/stream_ticks.php
@@ -0,0 +1,47 @@
+<?php
+// display the requested block of ticks
+// without storing all ticks in an array
+function stream_ticks(string $tickLocation, int $limit, int $offset = 0): Generator {
+    $tick_files = glob($tickLocation . '/*/*/*.txt');
+    usort($tick_files, fn($a, $b) => strcmp($b, $a)); // sort filenames in reverse chronological order
+
+    $count = 0;
+    foreach ($tick_files as $file) {
+        // read all the ticks from the current file and reverse the order
+        // so the most recent ones are first
+        //
+        // each file is a single day, so we never hold more than
+        // one day's ticks in memory
+        $lines = array_reverse(
+            file($file, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES)
+        );
+
+        $pathParts = explode('/', str_replace('\\', '/', $file));
+        $date = $pathParts[count($pathParts) - 3] . '-' .
+                $pathParts[count($pathParts) - 2] . '-' .
+                pathinfo($pathParts[count($pathParts) - 1], PATHINFO_FILENAME);
+
+        foreach ($lines as $line) {
+            // just keep skipping ticks until we get to the starting point
+            if ($offset > 0) {
+                $offset--;
+                continue;
+            }
+
+            // Ticks are pipe-delimited: timestamp|text
+            // But just in case a tick contains a pipe, only split on the first one that occurs
+            $tickParts = explode('|', $line, 2);
+            $time = $tickParts[0];
+            $tick = $tickParts[1];
+
+            yield [
+                'timestamp' => $date . ' ' . $time,
+                'tick' => $tick,
+            ];
+
+            if (++$count >= $limit) {
+                return;
+            }
+        }
+    }
+}
diff --git a/tkr/ticks/.gitkeep b/tkr/ticks/.gitkeep
new file mode 100644
index 0000000..e69de29