Add xml formatter for xml output closes #1

gd.js

@@ -3,7 +3,7 @@ const GoldDigger = require('./src/GoldDigger');
 const FileManager = require('./src/pdf/FileManager');
 
 
-const supportedFormat = ['text', 'json'];
+const supportedFormat = ['text', 'json', 'xml'];
 const ERR_INVALID_FORMAT = `
 Invalid output
 Please specify one of those values : "${supportedFormat}"

src/pdf/formatters/FormatterXML.js

@@ -14,6 +14,59 @@ class FormatterXML {
     `;
   }
 
+  /**
+   * Formats {@link TextObject} to xml object
+   * @param  {TextObject} textObject
+   * @returns {object}
+   */
+  formatTextObject (textObject) {
+    let txtObjOut = `<object x="${textObject.x}" y="${textObject.y}" matrix="${textObject.textMatrix}">\n`;
+    const lines = textObject.getData();
+    lines.sort((a, b) => {
+      if (a.y > b.y) return -1;
+      if (a.y < b.y) return 1;
+      return 0;
+    });
+    lines.forEach(textLine => {
+      txtObjOut += this.formatTextLine(textLine);
+    });
+    txtObjOut += '</object>';
+    return txtObjOut;
+  }
+
+  /**
+   * Formats {@link TextLine} to xml object
+   * @param {TextLine} textLine
+   * @returns {object}
+   */
+  formatTextLine (textLine) {
+    let txtLineOut = `<line y="${textLine.y}">\n`;
+    textLine.getText().forEach(textFont => {
+      txtLineOut += this.formatTextFont(textFont);
+    });
+    txtLineOut += '</line>\n';
+    return txtLineOut;
+  }
+
+  /**
+   * Formats {@link TextFont} to xml object
+   * @param {TextFont} textFont
+   * @returns {object}
+   */
+  formatTextFont (textFont) {
+    return `<text 
+    size="${textFont.font.size}" 
+    direction="${textFont.font.direction}"
+    family="${textFont.font.family}"
+    style="${textFont.font.style}"
+    weight="${textFont.font.weight}"
+    vertical="${textFont.font.vertical}"
+    x="${textFont.x}"
+    y="${textFont.y}"
+    char-spacing="${textFont.charSpacing}"
+    word-spacing="${textFont.wordSpacing}">${textFont.getText()}</text>\n`;
+  }
+
   /**
    * See {@link Formatter}
    * @param page
@@ -22,8 +75,12 @@ class FormatterXML {
    * @returns {string}
    */
   format (page, data, last) {
-    const output = '';
-    return output;
+    let out = '<data>\n';
+    data.forEach(textObject => {
+      out += this.formatTextObject(textObject) + '\n';
+    });
+    out += '</data>';
+    return out;
   }
 
   /**