edit.css: rename animation, Bug fix in DB\IO cursor_ext access and others

Make sure cursor_ext is set before we access it, else return null for
not set yet.
false for errors, else data value

Other class var access checks to be sure to never fail

www/layout/admin/css/edit.css

@@ -377,7 +377,7 @@ input[type="text"]:focus, textarea:focus, select:focus {
 	border-top-color: rgba(3, 155, 229 ,1);
 	border-radius: 50%;
 	display: inline-block;
-	animation: rotate 600ms infinite linear;
+	animation: progress-move 600ms infinite linear;
 	/* align */
 	left: 0;
 	top: 0;
@@ -385,7 +385,7 @@ input[type="text"]:focus, textarea:focus, select:focus {
 	z-index: 1000;
 }
 /* Animation for above progress */
-@keyframes rotate {
+@keyframes progress-move {
 	to {
 		transform: rotate(1turn)
 	}

www/lib/CoreLibs/DB/IO.php

@@ -302,9 +302,9 @@ class IO
 	/** @var string */
 	private string $to_encoding = '';
 	/** @var string the query string at the moment */
-	private string $query;
+	private string $query = '';
 	/** @var array<mixed> current params for query */
-	private array $params;
+	private array $params = [];
 	// only inside
 	// basic vars
 	// the dbh handler, if disconnected by command is null, bool:false on error,
@@ -344,7 +344,7 @@ class IO
 	// FOR BELOW: (This should be private and only readable through some method)
 	// cursor array for cached readings
 	/** @var array<string,mixed> extended cursoers string index with content */
-	private array $cursor_ext;
+	private array $cursor_ext = [];
 	// per query vars
 	/** @var \PgSql\Result|false actual cursor (DBH) */
 	private \PgSql\Result|false $cursor;
@@ -401,7 +401,7 @@ class IO
 	/** @var bool if we use RETURNING in the INSERT call */
 	private bool $returning_id = false;
 	/** @var string if a sync is running holds the hash key of the query */
-	private string $async_running;
+	private string $async_running = '';
 	// logging class, must be public so settings can be changed
 	/** @var \CoreLibs\Logging\Logging */
 	public \CoreLibs\Logging\Logging $log;
@@ -2687,7 +2687,7 @@ class IO
 	 */
 	public function dbGetCursor(): \PgSql\Result|false
 	{
-		return $this->cursor;
+		return $this->cursor ?? false;
 	}
 
 	// ***************************
@@ -2744,7 +2744,7 @@ class IO
 		}
 		$query_hash = $this->dbGetQueryHash($query, $params);
 		if (
-			is_array($this->cursor_ext) &&
+			!empty($this->cursor_ext) &&
 			isset($this->cursor_ext[$query_hash])
 		) {
 			if (empty($query_field)) {
@@ -2763,9 +2763,9 @@ class IO
 	 * @param  string       $query  Query to find in cursor_ext
 	 * @param  array<mixed> $params If the query is params type we need params
 	 *                              data to create a unique call one, optional
-	 * @return int|false            query position (row pos), false on error
+	 * @return int|false|null       query position (row pos), false on error
 	 */
-	public function dbGetCursorPos(string $query, array $params = []): int|false
+	public function dbGetCursorPos(string $query, array $params = []): int|false|null
 	{
 		$this->__dbErrorReset();
 		if (!$query) {
@@ -2773,7 +2773,14 @@ class IO
 			return false;
 		}
 		$query_hash = $this->dbGetQueryHash($query, $params);
-		return (int)$this->cursor_ext[$query_hash]['pos'];
+		if (
+			!empty($this->cursor_ext) &&
+			isset($this->cursor_ext[$query_hash])
+		) {
+			return (int)$this->cursor_ext[$query_hash]['pos'];
+		} else {
+			return null;
+		}
 	}
 
 	/**
@@ -2782,9 +2789,9 @@ class IO
 	 * @param  string       $query  Query to find in cursor_ext
 	 * @param  array<mixed> $params If the query is params type we need params
 	 *                              data to create a unique call one, optional
-	 * @return int|false            numer of rows returned, false on error
+	 * @return int|false|null       numer of rows returned, false on error
 	 */
-	public function dbGetCursorNumRows(string $query, array $params = []): int|false
+	public function dbGetCursorNumRows(string $query, array $params = []): int|false|null
 	{
 		$this->__dbErrorReset();
 		if (!$query) {
@@ -2792,7 +2799,14 @@ class IO
 			return false;
 		}
 		$query_hash = $this->dbGetQueryHash($query, $params);
-		return (int)$this->cursor_ext[$query_hash]['num_rows'];
+		if (
+			!empty($this->cursor_ext) &&
+			isset($this->cursor_ext[$query_hash])
+		) {
+			return (int)$this->cursor_ext[$query_hash]['num_rows'];
+		} else {
+			return null;
+		}
 	}
 
 	// ***************************
@@ -3194,7 +3208,7 @@ class IO
 	/**
 	 * Returns the current async running query hash
 	 *
-	 * @return string Current async running query hash
+	 * @return string Current async running query hash, empty string for nothing
 	 */
 	public function dbGetAsyncRunning(): string
 	{
@@ -3829,7 +3843,7 @@ class IO
 	 */
 	public function dbGetNumRows(): ?int
 	{
-		return $this->num_rows;
+		return $this->num_rows ?? null;
 	}
 
 	/**
@@ -3839,10 +3853,7 @@ class IO
 	 */
 	public function dbGetNumFields(): ?int
 	{
-		if (!isset($this->num_fields)) {
-			return null;
-		}
-		return $this->num_fields;
+		return $this->num_fields ?? null;
 	}
 
 	/**