Use the longest value in column to get column width in PDF report tab…

…les (#3326)

* Use the longest value in column to get column width

* Added changelog

* Improved code readability

CHANGELOG.md

@@ -44,6 +44,7 @@ All notable changes to the Wazuh app project will be documented in this file.
 - Fixed dark mode visualization background in pdf reports [#3315](https://github.com/wazuh/wazuh-kibana-app/pull/3315)
 - Adapt Kibana integrations to Kibana 7.11 and 7.12  [#3309](https://github.com/wazuh/wazuh-kibana-app/pull/3309)
 - Fixed error agent view does not render correctly  [#3306](https://github.com/wazuh/wazuh-kibana-app/pull/3306)
+- Fixed miscalculation in table column width in PDF reports  [#3326](https://github.com/wazuh/wazuh-kibana-app/pull/3326)
 - Normalized visData table property for 7.12 retro-compatibility  [#3323](https://github.com/wazuh/wazuh-kibana-app/pull/3323)
 
 ## Wazuh v4.2.0 - Kibana 7.10.2 , 7.11.2 - Revision 4201

server/lib/reporting/printer.ts

@@ -496,11 +496,13 @@ export class ReportPrinter{
     let totalLength = columns.length - 1;
     const widthColumn = 385/totalLength;
     let totalWidth = totalLength * widthColumn;
-    const widthCharacter = 5; //min width per character
-    const widths = [];
+
+    const widths:(number)[] = [];
 
     for (let step = 0; step < columns.length - 1; step++) {
-      let columnLength = tableRows[0][step].text.length * widthCharacter;
+
+      let columnLength = this.getColumnWidth(columns[step], tableRows, step);
+
       if (columnLength <= Math.round(totalWidth / totalLength)) {
         widths.push(columnLength);
         totalWidth -= columnLength;
@@ -615,4 +617,28 @@ export class ReportPrinter{
     document.end();
   }
 
+  /**
+   * Returns the width of a given column
+   * 
+   * @param column 
+   * @param tableRows 
+   * @param step 
+   * @returns {number}
+   */
+  getColumnWidth(column, tableRows, index){
+    const widthCharacter = 5; //min width per character
+
+    //Get the longest row value
+    const maxRowLength = tableRows.reduce((maxLength, row)=>{
+      return (row[index].text.length > maxLength ? row[index].text.length : maxLength);
+    },0);
+
+    //Get column name length
+    const headerLength = column.label.length;
+
+    //Use the longest to get the column width
+    const maxLength = maxRowLength > headerLength ? maxRowLength : headerLength;
+
+    return maxLength * widthCharacter;
+  }
 }