init sqlite implementation

.gitignore

@@ -1,4 +1,7 @@
 /composer.lock
-/config.json
+
+/config/*
+!/config/example.json
+
 /server/
 /vendor/

README.md

@@ -2,32 +2,18 @@
 
 RSS Aggregator for [Gemini Protocol](https://geminiprotocol.net)
 
-Simple RSS feed converter to static Gemtext format, useful for news portals or localhost reading
+## Components
+
+* [x] `src/crawler.php` - scan configured RSS feeds and dump results to SQLite (see also [FS branch](https://github.com/YGGverse/Pulsar/tree/fs))
+* [ ] `src/nex.php` - Build-in server for [NEX Protocol](https://nightfall.city/nps/info/specification.txt)
+* [ ] `src/gemini.php` - Build-in server for [Gemini Protocol](https://geminiprotocol.net)
 
 ## Example
 
-* `nex://[301:23b4:991a:634d::feed]/index.gmi` - [Yggdrasil](https://github.com/yggdrasil-network/yggdrasil-go) instance by YGGverse
+* `nex://[301:23b4:991a:634d::feed]` - [Yggdrasil](https://github.com/yggdrasil-network/yggdrasil-go) instance by YGGverse
 
 ## Usage
 
 1. `git clone https://github.com/YGGverse/Pulsar.git`
-2. `cp example/config.json config.json` - setup your feed locations
+2. `cp config/example.json name.json` - setup your feed
-3. `php src/crawler.php` - grab feeds manually or using crontab
+3. `php src/crawler.php name.json` - grab feeds manually or using crontabdes
-
-## Config
-
-Configuration file supports multiple feed channels with custom settings:
-
-* `source` - string, filepath or URL to the valid RSS feed
-* `target` - string, relative or absolute path to Gemtext dumps
-* `item`
-  * `limit` - integer, how many items to display on page generated
-  * `template` - string, custom pattern for feed item, that supports following macros
-    * `{nl}` - new line separator
-    * `{link}` - item link
-    * `{guid}` - item guid
-    * `{pubDate}` - item pubDate, soon with custom time format e.g. `{pubDate:Y-m-d H:s}`
-    * `{title}` - item title
-    * `{description}` - item description
-
-Resulting files could be placed to any local folder (for personal reading) or shared with others (using [gmid](https://github.com/omar-polo/gmid), [twins](https://code.rocket9labs.com/tslocum/twins) or any other [server](https://github.com/kr1sp1n/awesome-gemini#servers) for `gemtext` statics)

composer.json

@@ -15,7 +15,5 @@
             "name": "YGGverse"
         }
     ],
-    "require": {
+    "require": {}
-        "yggverse/titan-ii": "^1.0"
-    }
 }

config/example.json

@@ -0,0 +1,88 @@
+{
+    "database":
+    {
+        "location":"example.sqlite",
+        "username":null,
+        "password":null
+    },
+    "crawler":
+    {
+        "channel":
+        [
+            {
+                "source":"https://www.omglinux.com/feed",
+                "enabled":true,
+                "item":
+                {
+                    "link":
+                    {
+                        "enabled":true,
+                        "required":false
+                    },
+                    "pubDate":
+                    {
+                        "enabled":true,
+                        "required":false
+                    },
+                    "title":
+                    {
+                        "enabled":true,
+                        "required":false
+                    },
+                    "description":
+                    {
+                        "enabled":true,
+                        "required":false
+                    },
+                    "content":{
+                        "enabled":false,
+                        "required":false
+                    }
+                },
+                "debug":
+                {
+                    "info":true,
+                    "warning":true,
+                    "error":true
+                }
+            },
+            {
+                "source":"https://omgubuntu.co.uk/feed",
+                "enabled":false,
+                "item":
+                {
+                    "link":
+                    {
+                        "enabled":true,
+                        "required":false
+                    },
+                    "pubDate":
+                    {
+                        "enabled":true,
+                        "required":false
+                    },
+                    "title":
+                    {
+                        "enabled":true,
+                        "required":false
+                    },
+                    "description":
+                    {
+                        "enabled":true,
+                        "required":false
+                    },
+                    "content":{
+                        "enabled":false,
+                        "required":false
+                    }
+                },
+                "debug":
+                {
+                    "info":true,
+                    "warning":true,
+                    "error":true
+                }
+            }
+        ]
+    }
+}

example/config.json

@@ -1,23 +0,0 @@
-{
-    "feed":
-    [
-        {
-            "source":"https://www.omglinux.com/feed",
-            "target":"server/127.0.0.1/public/omglinux/feed.gmi",
-            "item":
-            {
-                "template":"=> {link} {title}{nl}{nl}{description}",
-                "limit":20
-            }
-        },
-        {
-            "source":"https://omgubuntu.co.uk/feed",
-            "target":"server/127.0.0.1/public/omgubuntu/feed.gmi",
-            "item":
-            {
-                "template":"=> {link} {title}{nl}{nl}{description}",
-                "limit":20
-            }
-        }
-    ]
-}

src/Model/Database.php

@@ -0,0 +1,171 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yggverse\Pulsar\Model;
+
+class Database
+{
+    public \PDO $_database;
+
+    public function __construct(
+        string  $database,
+        ?string $username = null,
+        ?string $password = null
+    ) {
+        $this->_database = new \PDO(
+            sprintf(
+                'sqlite:%s',
+                $database
+            ),
+            $username,
+            $password
+        );
+
+        $this->_database->setAttribute(
+            \PDO::ATTR_ERRMODE,
+            \PDO::ERRMODE_EXCEPTION
+        );
+
+        $this->_database->setAttribute(
+            \PDO::ATTR_DEFAULT_FETCH_MODE,
+            \PDO::FETCH_OBJ
+        );
+
+        $this->_database->query('
+            CREATE TABLE IF NOT EXISTS "channel"
+            (
+                "id"          INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+                "time"        INTEGER NOT NULL,
+                "source"      TEXT NOT NULL,
+                "link"        TEXT,
+                "title"       TEXT,
+                "description" TEXT
+            )
+        ');
+
+        $this->_database->query('
+            CREATE TABLE IF NOT EXISTS "channelItem"
+            (
+                "id"          INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
+                "channelId"   INTEGER NOT NULL,
+                "time"        INTEGER NOT NULL,
+                "pubTime"     INTEGER,
+                "guid"        TEXT NOT NULL,
+                "link"        TEXT,
+                "title"       TEXT,
+                "description" TEXT,
+                "content"     TEXT
+            )
+        ');
+    }
+
+    public function getChannelIdBySource(
+        string $source
+    ): ?int
+    {
+        $query = $this->_database->prepare(
+            'SELECT `id` FROM `channel` WHERE `source` LIKE :source LIMIT 1'
+        );
+
+        $query->execute(
+            [
+                ':source' => $source
+            ]
+        );
+
+        if ($result = $query->fetch())
+        {
+            return $result->id;
+        }
+
+        return null;
+    }
+
+    public function addChannel(
+        string $source,
+        ?string $link,
+        ?string $title,
+        ?string $description,
+        ?int $time = null
+    ): ?int
+    {
+        $query = $this->_database->prepare(
+            'INSERT INTO `channel` (`source`, `link`, `title`, `description`, `time`)
+                            VALUES (:source,  :link,  :title,  :description,  :time)'
+        );
+
+        $query->execute(
+            [
+                ':source'      => $source,
+                ':link'        => $link,
+                ':title'       => $title,
+                ':description' => $description,
+                ':time'        => $time ? $time : time()
+            ]
+        );
+
+        if ($id = $this->_database->lastInsertId())
+        {
+            return (int) $id;
+        }
+
+        return null;
+    }
+
+    public function isChannelItemExist(
+        int $channelId,
+        string $guid
+    ): bool
+    {
+        $query = $this->_database->prepare(
+            'SELECT NULL FROM `channelItem` WHERE `channelId` = :channelId AND `guid` LIKE :guid LIMIT 1'
+        );
+
+        $query->execute(
+            [
+                ':channelId' => $channelId,
+                ':guid'      => $guid
+            ]
+        );
+
+        return (bool) $query->fetch();
+    }
+
+    public function addChannelItem(
+        int $channelId,
+        string $guid,
+        ?string $link,
+        ?string $title,
+        ?string $description,
+        ?string $content,
+        ?int $pubTime,
+        ?int $time = null
+    ): ?int
+    {
+        $query = $this->_database->prepare(
+            'INSERT INTO `channelItem` (`channelId`, `guid`, `link`, `title`, `description`, `content`, `pubTime`, `time`)
+                                VALUES (:channelId,  :guid,  :link,  :title,  :description,  :content,  :pubTime,  :time)'
+        );
+
+        $query->execute(
+            [
+                ':channelId'   => $channelId,
+                ':guid'        => $guid,
+                ':link'        => $link,
+                ':title'       => $title,
+                ':description' => $description,
+                ':content'     => $content,
+                ':pubTime'     => $pubTime,
+                ':time'        => $time ? $time : time()
+            ]
+        );
+
+        if ($id = $this->_database->lastInsertId())
+        {
+            return (int) $id;
+        }
+
+        return null;
+    }
+}

src/Model/Filter.php

@@ -0,0 +1,69 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yggverse\Pulsar\Model;
+
+class Filter
+{
+    public static function url(
+        string $value
+    ): string
+    {
+        return trim(
+            urldecode(
+                $value
+            )
+        );
+    }
+
+    public static function title(
+        string $value
+    ): string
+    {
+        return trim(
+            preg_replace(
+                [
+                    '/[\n\r]*/',
+                    '/[\s]{2,}/',
+                ],
+                ' ',
+                $this->text(
+                    $value
+                )
+            )
+        );
+    }
+
+    public static function description(
+        string $value
+    ): string
+    {
+        return $this->text(
+            $value
+        );
+    }
+
+    public static function text(
+        string $value
+    ): string
+    {
+        return trim(
+            preg_replace(
+                [
+                    '/[\n\r]{2,}/',
+                    '/[\s]{2,}/',
+                ],
+                [
+                    PHP_EOL,
+                    ' '
+                ],
+                strip_tags(
+                    html_entity_decode(
+                        $value
+                    )
+                )
+            )
+        );
+    }
+}

src/crawler.php

@@ -7,126 +7,354 @@ $semaphore = sem_get(
     ), 1
 );
 
-if (false === sem_acquire($semaphore, true))
+if (false === sem_acquire($semaphore, true)) exit;
-{
+
-    exit;
+// Load dependencies
-}
+require_once __DIR__ .
+             DIRECTORY_SEPARATOR . '..'.
+             DIRECTORY_SEPARATOR . 'vendor' .
+             DIRECTORY_SEPARATOR . 'autoload.php';
+
+// Init profile argument
+if (empty($argv[1])) throw new \Exception();
 
 // Init config
 $config = json_decode(
     file_get_contents(
-        __DIR__ . DIRECTORY_SEPARATOR . '..' . DIRECTORY_SEPARATOR . 'config.json'
+        str_starts_with(
+            $argv[1],
+            DIRECTORY_SEPARATOR
+        ) ? $argv[1]  // absolute
+          : __DIR__ . // relative
+            DIRECTORY_SEPARATOR . '..'.
+            DIRECTORY_SEPARATOR . 'config'.
+            DIRECTORY_SEPARATOR . $argv[1]
     )
+);  if (!$config) throw new \Exception();
+
+// Init database
+$database = new \Yggverse\Pulsar\Model\Database(
+    str_starts_with(
+        $config->database->location,
+        DIRECTORY_SEPARATOR
+    ) ? $config->database->location
+      : __DIR__ .
+        DIRECTORY_SEPARATOR . '..'.
+        DIRECTORY_SEPARATOR . 'config'.
+        DIRECTORY_SEPARATOR . $config->database->location,
+    $config->database->username,
+    $config->database->password
 );
 
-// Update feeds
+// Begin channels crawl
-foreach ($config->feed as $feed)
+foreach ($config->crawler->channel as $channel)
 {
-    // Init feed location
+    // Check channel enabled
-    $filename = str_starts_with(
+    if (!$channel->enabled)
-        $feed->target,
-        DIRECTORY_SEPARATOR
-    ) ? $feed->target : __DIR__ . DIRECTORY_SEPARATOR . '..' . DIRECTORY_SEPARATOR . $feed->target;
-
-    // Init destination storage
-    @mkdir(
-        dirname(
-            $filename
-        ),
-        0755,
-        true
-    );
-
-    // Get feed data
-    if (!$channel = simplexml_load_file($feed->source)->channel)
     {
+        if ($channel->debug->info)
+        {
+            printf(
+                _('[%s] [info] skip disabled channel "%s"') . PHP_EOL,
+                date('c'),
+                $channel->source
+            ) . PHP_EOL;
+        }
+
         continue;
     }
 
-    // Update title
+    // Get channel data
-    if (!empty($channel->title))
+    if (!$remoteChannel = simplexml_load_file($channel->source)->channel)
     {
-        $title = trim(
+        if ($channel->debug->warning)
-            strip_tags(
+        {
-                html_entity_decode(
+            printf(
-                    $channel->title
+                _('[%s] [warning] channel "%s" not accessible') . PHP_EOL,
-                )
+                date('c'),
-            )
+                $channel->source
+            ) . PHP_EOL;
+        }
+
+        continue;
+    }
+
+    // Init channel
+    if (!$channelId = $database->getChannelIdBySource($channel->source))
+    {
+        // Create new one if not exists
+        $channelId = $database->addChannel(
+            $channel->source,
+            isset($remoteChannel->link) ? (string) $remoteChannel->link : null,
+            isset($remoteChannel->title) ? (string) $remoteChannel->title : null,
+            isset($remoteChannel->description) ? (string) $remoteChannel->description : null
         );
+
+        if ($channel->debug->info)
+        {
+            printf(
+                _('[%s] [info] channel "%s" registered as #%d') . PHP_EOL,
+                date('c'),
+                $channel->source,
+                $channelId
+            ) . PHP_EOL;
+        }
+    }
+
+    // Process items
+    if (!empty($remoteChannel->item))
+    {
+        foreach ($remoteChannel->item as $remoteChannelItem)
+        {
+            // Prepare link
+            $link = null;
+
+            if ($channel->item->link->enabled)
+            {
+                if (isset($remoteChannelItem->link))
+                {
+                    $link = (string) $remoteChannelItem->link;
                 }
 
                 else
                 {
-        $title = parse_url(
+                    if ($channel->debug->info)
-            $feed->source,
+                    {
-            PHP_URL_HOST
+                        printf(
-        );
+                            _('[%s] [info] item link enabled but not defined in channel #%d') . PHP_EOL,
+                            date('c'),
+                            $channelId
+                        ) . PHP_EOL;
+                    }
                 }
 
-    file_put_contents(
+                if ($channel->item->link->required && !$link)
-        $filename,
-        sprintf(
-            '# %s',
-            $title
-        ) . PHP_EOL
-    );
-
-    // Append description
-    if (!empty($channel->description))
                 {
-        file_put_contents(
+                    if ($channel->debug->warning)
-            $filename,
+                    {
-            PHP_EOL . trim(
+                        printf(
-                strip_tags(
+                            _('[%s] [warning] could not get item link for channel #%d') . PHP_EOL,
-                    html_entity_decode(
+                            date('c'),
-                        $channel->description
+                            $channelId
-                    )
+                        ) . PHP_EOL;
-                )
-            ) . PHP_EOL,
-            FILE_APPEND | LOCK_EX
-        );
                     }
 
-    // Append items
+                    continue;
-    $i = 1; foreach ($channel->item as $item)
+                }
-    {
-        // Apply items limit
-        if ($i > $feed->item->limit)
-        {
-            break;
             }
 
-        // Format item
+            // Prepare guid or define it from link
-        file_put_contents(
+            $guid = null;
-            $filename,
+
-            PHP_EOL . trim(
+            if (isset($remoteChannelItem->guid))
-                preg_replace(
+            {
-                    '/[\s]{3,}/ui',
+                $guid = (string) $remoteChannelItem->guid;
-                    PHP_EOL . PHP_EOL,
+            }
-                    str_replace(
+
-                        [
+            else
-                            '{nl}',
+            {
-                            '{link}',
+                $guid = $link;
-                            '{guid}',
+
-                            '{pubDate}',
+                if ($channel->debug->warning)
-                            '{title}',
+                {
-                            '{description}'
+                    printf(
-                        ],
+                        _('[%s] [warning] item guid defined as link in channel #%d') . PHP_EOL,
-                        [
+                        date('c'),
-                            PHP_EOL,
+                        $channelId
-                            !empty($item->link)        ? trim($item->link) : '',
+                    ) . PHP_EOL;
-                            !empty($item->guid)        ? trim($item->guid) : '',
+                }
-                            !empty($item->pubDate)     ? trim($item->pubDate) : '',
+            }
-                            !empty($item->title)       ? trim(strip_tags(html_entity_decode($item->title))) : '',
+
-                            !empty($item->description) ? trim(strip_tags(html_entity_decode($item->description))) : ''
+            // Prepare title
-                        ],
+            $title = null;
-                        $feed->item->template
+
-                    ) . PHP_EOL
+            if ($channel->item->title->enabled)
-                )
+            {
-            ) . PHP_EOL,
+                if (isset($remoteChannelItem->title))
-            FILE_APPEND | LOCK_EX
+                {
+                    $title = (string) $remoteChannelItem->title;
+                }
+
+                else
+                {
+                    if ($channel->debug->info)
+                    {
+                        printf(
+                            _('[%s] [info] item title enabled but not defined in channel #%d') . PHP_EOL,
+                            date('c'),
+                            $channelId
+                        ) . PHP_EOL;
+                    }
+                }
+
+                if ($channel->item->title->required && !$title)
+                {
+                    if ($channel->debug->warning)
+                    {
+                        printf(
+                            _('[%s] [warning] could not get item title in channel #%d') . PHP_EOL,
+                            date('c'),
+                            $channelId
+                        ) . PHP_EOL;
+                    }
+
+                    continue;
+                }
+            }
+
+            // Prepare description
+            $description = null;
+
+            if ($channel->item->description->enabled)
+            {
+                if (isset($remoteChannelItem->description))
+                {
+                    $description = (string) $remoteChannelItem->description;
+                }
+
+                else
+                {
+                    if ($channel->debug->info)
+                    {
+                        printf(
+                            _('[%s] [info] item description enabled but not defined in channel #%d') . PHP_EOL,
+                            date('c'),
+                            $channelId
+                        ) . PHP_EOL;
+                    }
+                }
+
+                if ($channel->item->description->required && !$description)
+                {
+                    if ($channel->debug->warning)
+                    {
+                        printf(
+                            _('[%s] [warning] could not get item description in channel #%d') . PHP_EOL,
+                            date('c'),
+                            $channelId
+                        ) . PHP_EOL;
+                    }
+
+                    continue;
+                }
+            }
+
+            // Prepare content
+            $content = null;
+
+            if ($channel->item->content->enabled)
+            {
+                if ($_content = $remoteChannelItem->children('content', true))
+                {
+                    if (isset($_content->encoded))
+                    {
+                        $content = (string) $_content->encoded;
+                    }
+                }
+
+                if (!$content && $channel->debug->info)
+                {
+                    printf(
+                        _('[%s] [info] item content enabled but not defined in channel #%d') . PHP_EOL,
+                        date('c'),
+                        $channelId
+                    ) . PHP_EOL;
+                }
+
+                if ($channel->item->content->required && !$content)
+                {
+                    if ($channel->debug->warning)
+                    {
+                        printf(
+                            _('[%s] [warning] could not get item content in channel #%d') . PHP_EOL,
+                            date('c'),
+                            $channelId
+                        ) . PHP_EOL;
+                    }
+
+                    continue;
+                }
+            }
+
+            // Prepare pubDate
+            $pubTime = null;
+
+            if ($channel->item->pubDate->enabled)
+            {
+                if (isset($remoteChannelItem->pubDate))
+                {
+                    if ($_pubTime = strtotime((string) $remoteChannelItem->pubDate))
+                    {
+                        $pubTime = $_pubTime;
+                    }
+
+                    else
+                    {
+                        if ($channel->debug->warning)
+                        {
+                            printf(
+                                _('[%s] [info] could not convert item pubDate to pubTime in channel #%d') . PHP_EOL,
+                                date('c'),
+                                $channelId
+                            ) . PHP_EOL;
+                        }
+                    }
+                }
+
+                else
+                {
+                    if ($channel->debug->info)
+                    {
+                        printf(
+                            _('[%s] [info] item pubDate enabled but not defined in channel #%d') . PHP_EOL,
+                            date('c'),
+                            $channelId
+                        ) . PHP_EOL;
+                    }
+                }
+
+                if ($channel->item->pubDate->required && !$pubTime)
+                {
+                    if ($channel->debug->warning)
+                    {
+                        printf(
+                            _('[%s] [warning] could not get item pubDate in channel #%d') . PHP_EOL,
+                            date('c'),
+                            $channelId
+                        ) . PHP_EOL;
+                    }
+
+                    continue;
+                }
+            }
+
+            // Check item not registered yet
+            if (!$database->isChannelItemExist($channelId, $guid))
+            {
+                // Create new one if not exists
+                $channelItemId = $database->addChannelItem(
+                    $channelId,
+                    $guid,
+                    $link,
+                    $title,
+                    $description,
+                    $content,
+                    $pubTime
                 );
 
-        $i++;
+                if ($channelItemId)
+                {
+                    if ($channel->debug->info)
+                    {
+                        printf(
+                            _('[%s] [info] registered new item #%d for channel #%d') . PHP_EOL,
+                            date('c'),
+                            $channelItemId,
+                            $channelId
+                        ) . PHP_EOL;
+                    }
+                }
+            }
+        }
     }
 }