354 lines
11 KiB
PHP
354 lines
11 KiB
PHP
<?php
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class Af_Sort_Bayes extends Plugin {
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private $host;
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private $filters = array();
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private $dbh;
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private $score_modifier = 50;
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private $sql_prefix = "ttrss_plugin_af_sort_bayes";
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private $auto_categorize_threshold = 10000;
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function about() {
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return array(1.0,
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"Bayesian classifier for tt-rss (WIP)",
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"fox");
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}
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function init($host) {
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require_once __DIR__ . "/lib/class.naivebayesian.php";
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//require_once __DIR__ . "/lib/class.naivebayesian_ngram.php";
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require_once __DIR__ . "/lib/class.naivebayesianstorage.php";
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$this->host = $host;
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$this->dbh = Db::get();
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$this->init_database();
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$host->add_hook($host::HOOK_ARTICLE_FILTER, $this);
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$host->add_hook($host::HOOK_PREFS_TAB, $this);
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$host->add_hook($host::HOOK_ARTICLE_BUTTON, $this);
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}
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function trainArticle() {
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$article_id = (int) $_REQUEST["article_id"];
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$train_up = sql_bool_to_bool($_REQUEST["train_up"]);
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//$category = $train_up ? "GOOD" : "UGLY";
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$dst_category = "UGLY";
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$nbs = new NaiveBayesianStorage($_SESSION["uid"]);
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$nb = new NaiveBayesian($nbs);
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$result = $this->dbh->query("SELECT score, guid, title, content FROM ttrss_entries, ttrss_user_entries WHERE ref_id = id AND id = " .
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$article_id . " AND owner_uid = " . $_SESSION["uid"]);
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if ($this->dbh->num_rows($result) != 0) {
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$guid = $this->dbh->fetch_result($result, 0, "guid");
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$title = $this->dbh->fetch_result($result, 0, "title");
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$content = mb_strtolower($title . " " . strip_tags($this->dbh->fetch_result($result, 0, "content")));
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$score = $this->dbh->fetch_result($result, 0, "score");
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$this->dbh->query("BEGIN");
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$ref = $nbs->getReference($guid, false);
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if (isset($ref['category_id'])) {
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$current_category = $nbs->getCategoryById($ref['category_id']);
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} else {
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$current_category = "UGLY";
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}
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// set score to fixed value for now
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if ($train_up) {
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switch ($current_category) {
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case "UGLY":
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$dst_category = "GOOD";
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$score = $this->score_modifier;
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break;
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case "BAD":
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$dst_category = "UGLY";
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$score = 0;
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break;
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case "GOOD":
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$dst_category = "GOOD";
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break;
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}
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} else {
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switch ($current_category) {
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case "UGLY":
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$dst_category = "BAD";
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$score = -$this->score_modifier;
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break;
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case "BAD":
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$dst_category = "BAD";
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break;
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case "GOOD":
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$dst_category = "UGLY";
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$score = 0;
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break;
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}
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}
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$nb->untrain($guid, $content);
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$nb->train($guid, $nbs->getCategoryByName($dst_category), $content);
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$this->dbh->query("UPDATE ttrss_user_entries SET score = '$score' WHERE ref_id = $article_id AND owner_uid = " . $_SESSION["uid"]);
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$nb->updateProbabilities();
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$this->dbh->query("COMMIT");
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}
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print "$article_id :: $dst_category :: $score";
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}
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function get_js() {
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return file_get_contents(__DIR__ . "/init.js");
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}
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function get_prefs_js() {
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return file_get_contents(__DIR__ . "/init.js");
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}
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function hook_article_button($line) {
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return "<img src=\"plugins/af_sort_bayes/thumb_up.png\"
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style=\"cursor : pointer\" style=\"cursor : pointer\"
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onclick=\"bayesTrain(".$line["id"].", true, event)\"
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class='tagsPic' title='".__('+1')."'>" .
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"<img src=\"plugins/af_sort_bayes/thumb_down.png\"
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style=\"cursor : pointer\" style=\"cursor : pointer\"
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onclick=\"bayesTrain(".$line["id"].", false, event)\"
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class='tagsPic' title='".__('-1')."'>";
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}
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function init_database() {
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$prefix = $this->sql_prefix;
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// TODO there probably should be a way for plugins to determine their schema version to upgrade tables
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/*$this->dbh->query("DROP TABLE IF EXISTS ${prefix}_wordfreqs", false);
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$this->dbh->query("DROP TABLE IF EXISTS ${prefix}_references", false);
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$this->dbh->query("DROP TABLE IF EXISTS ${prefix}_categories", false);*/
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$this->dbh->query("BEGIN");
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// PG only for the time being
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if (DB_TYPE == "mysql") {
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$this->dbh->query("CREATE TABLE IF NOT EXISTS ${prefix}_categories (
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id INTEGER NOT NULL PRIMARY KEY auto_increment,
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category varchar(100) NOT NULL DEFAULT '',
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probability DOUBLE NOT NULL DEFAULT '0',
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owner_uid INTEGER NOT NULL,
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FOREIGN KEY (owner_uid) REFERENCES ttrss_users(id) ON DELETE CASCADE,
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word_count BIGINT NOT NULL DEFAULT '0') ENGINE=InnoDB");
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$this->dbh->query("CREATE TABLE IF NOT EXISTS ${prefix}_references (
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id INTEGER NOT NULL PRIMARY KEY auto_increment,
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document_id VARCHAR(255) NOT NULL,
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category_id INTEGER NOT NULL,
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FOREIGN KEY (category_id) REFERENCES ${prefix}_categories(id) ON DELETE CASCADE,
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owner_uid INTEGER NOT NULL,
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FOREIGN KEY (owner_uid) REFERENCES ttrss_users(id) ON DELETE CASCADE) ENGINE=InnoDB");
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$this->dbh->query("CREATE TABLE IF NOT EXISTS ${prefix}_wordfreqs (
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word varchar(100) NOT NULL DEFAULT '',
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category_id INTEGER NOT NULL,
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FOREIGN KEY (category_id) REFERENCES ${prefix}_categories(id) ON DELETE CASCADE,
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owner_uid INTEGER NOT NULL,
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FOREIGN KEY (owner_uid) REFERENCES ttrss_users(id) ON DELETE CASCADE,
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count BIGINT NOT NULL DEFAULT '0') ENGINE=InnoDB");
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} else {
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$this->dbh->query("CREATE TABLE IF NOT EXISTS ${prefix}_categories (
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id SERIAL NOT NULL PRIMARY KEY,
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category varchar(100) NOT NULL DEFAULT '',
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probability DOUBLE PRECISION NOT NULL DEFAULT '0',
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owner_uid INTEGER NOT NULL REFERENCES ttrss_users(id) ON DELETE CASCADE,
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word_count BIGINT NOT NULL DEFAULT '0')");
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$this->dbh->query("CREATE TABLE IF NOT EXISTS ${prefix}_references (
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id SERIAL NOT NULL PRIMARY KEY,
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document_id VARCHAR(255) NOT NULL,
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category_id INTEGER NOT NULL REFERENCES ${prefix}_categories(id) ON DELETE CASCADE,
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owner_uid INTEGER NOT NULL REFERENCES ttrss_users(id) ON DELETE CASCADE)");
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$this->dbh->query("CREATE TABLE IF NOT EXISTS ${prefix}_wordfreqs (
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word varchar(100) NOT NULL DEFAULT '',
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category_id INTEGER NOT NULL REFERENCES ${prefix}_categories(id) ON DELETE CASCADE,
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owner_uid INTEGER NOT NULL REFERENCES ttrss_users(id) ON DELETE CASCADE,
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count BIGINT NOT NULL DEFAULT '0')");
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}
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$owner_uid = @$_SESSION["uid"];
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if ($owner_uid) {
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$result = $this->dbh->query("SELECT id FROM ${prefix}_categories WHERE owner_uid = $owner_uid LIMIT 1");
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if ($this->dbh->num_rows($result) == 0) {
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$this->dbh->query("INSERT INTO ${prefix}_categories (category, owner_uid) VALUES ('GOOD', $owner_uid)");
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$this->dbh->query("INSERT INTO ${prefix}_categories (category, owner_uid) VALUES ('BAD', $owner_uid)");
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$this->dbh->query("INSERT INTO ${prefix}_categories (category, owner_uid) VALUES ('UGLY', $owner_uid)");
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}
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}
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$this->dbh->query("COMMIT");
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}
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function renderPrefsUI() {
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$result = $this->dbh->query("SELECT category, probability, word_count,
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(SELECT COUNT(id) FROM {$this->sql_prefix}_references WHERE
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category_id = {$this->sql_prefix}_categories.id) as doc_count
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FROM {$this->sql_prefix}_categories WHERE owner_uid = " . $_SESSION["uid"]);
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print "<h3>" . __("Statistics") . "</h3>";
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print "<p>".T_sprintf("Required UGLY word count for automatic matching: %d", $this->auto_categorize_threshold)."</p>";
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print "<table>";
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print "<tr><th>Category</th><th>Probability</th><th>Words</th><th>Articles</th></tr>";
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while ($line = $this->dbh->fetch_assoc($result)) {
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print "<tr>";
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foreach ($line as $k => $v) {
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if ($k == "probability") $v = sprintf("%.3f", $v);
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print "<td>$v</td>";
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}
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print "</tr>";
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}
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print "</table>";
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print "<h3>" . __("Last matched articles") . "</h3>";
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$result = $this->dbh->query("SELECT te.title, category, tf.title AS feed_title
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FROM ttrss_entries AS te, ttrss_user_entries AS tu, ttrss_feeds AS tf, {$this->sql_prefix}_references AS tr, {$this->sql_prefix}_categories AS tc
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WHERE tf.id = tu.feed_id AND tu.ref_id = te.id AND tc.id = tr.category_id AND tr.document_id = te.guid ORDER BY te.id DESC LIMIT 20");
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print "<ul class=\"browseFeedList\" style=\"border-width : 1px\">";
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while ($line = $this->dbh->fetch_assoc($result)) {
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print "<li>" . $line["category"] . ": " . $line["title"] . " (" . $line["feed_title"] . ")</li>";
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}
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print "</ul>";
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print "<button dojoType=\"dijit.form.Button\" onclick=\"return bayesUpdateUI()\">".
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__('Refresh')."</button> ";
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print "<button dojoType=\"dijit.form.Button\" onclick=\"return bayesClearDatabase()\">".
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__('Clear database')."</button> ";
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//
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}
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function hook_prefs_tab($args) {
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if ($args != "prefPrefs") return;
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print "<div id=\"af_sort_bayes_prefs\" dojoType=\"dijit.layout.AccordionPane\" title=\"".__('Bayesian classifier (af_sort_bayes)')."\">";
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$this->renderPrefsUI();
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print "</div>";
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}
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function hook_article_filter($article) {
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$owner_uid = $article["owner_uid"];
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// guid already includes owner_uid so we don't need to include it
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$result = $this->dbh->query("SELECT id FROM {$this->sql_prefix}_references WHERE
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document_id = '" . $this->dbh->escape_string($article['guid_hashed']) . "'");
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if (db_num_rows($result) != 0) {
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_debug("bayes: article already categorized");
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return $article;
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}
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$nbs = new NaiveBayesianStorage($owner_uid);
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$nb = new NaiveBayesian($nbs);
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$categories = $nbs->getCategories();
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if (count($categories) > 0) {
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$count_neutral = 0;
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$id_good = 0;
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$id_ugly = 0;
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$id_bad = 0;
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foreach ($categories as $id => $cat) {
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if ($cat["category"] == "GOOD") {
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$id_good = $id;
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} else if ($cat["category"] == "UGLY") {
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$id_ugly = $id;
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$count_neutral += $cat["word_count"];
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} else if ($cat["category"] == "BAD") {
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$id_bad = $id;
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}
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}
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$dst_category = $id_ugly;
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$bayes_content = mb_strtolower($article["title"] . " " . strip_tags($article["content"]));
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if ($count_neutral >= $this->auto_categorize_threshold) {
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// enable automatic categorization
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$result = $nb->categorize($bayes_content);
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//print_r($result);
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if (count($result) == 3) {
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$prob_good = $result[$id_good];
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$prob_bad = $result[$id_bad];
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if ($prob_good > 0.90) {
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$dst_category = $id_good;
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$article["score_modifier"] += $this->score_modifier;
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} else if ($prob_bad > 0.90) {
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$dst_category = $id_bad;
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$article["score_modifier"] -= $this->score_modifier;
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}
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}
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_debug("bayes, dst category: $dst_category");
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}
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$nb->train($article["guid_hashed"], $dst_category, $bayes_content);
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$nb->updateProbabilities();
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}
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return $article;
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}
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function clearDatabase() {
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$prefix = $this->sql_prefix;
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$this->dbh->query("BEGIN");
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$this->dbh->query("DELETE FROM ${prefix}_references WHERE owner_uid = " . $_SESSION["uid"]);
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$this->dbh->query("DELETE FROM ${prefix}_wordfreqs WHERE owner_uid = " . $_SESSION["uid"]);
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$this->dbh->query("COMMIT");
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$nbs = new NaiveBayesianStorage($_SESSION["uid"]);
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$nb = new NaiveBayesian($nbs);
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$nb->updateProbabilities();
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}
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function api_version() {
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return 2;
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}
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}
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?>
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