support exporting statistics & analysis result to mermaid

src/core/file.ts

@@ -7,6 +7,7 @@ export class KnownFileType {
     public static readonly SSV = new KnownFileType('txt', 'text/plain');
     public static readonly TXT = new KnownFileType('txt', 'text/plain');
     public static readonly MARKDOWN = new KnownFileType('md', 'text/markdown');
+    public static readonly MERMAID = new KnownFileType('mermaid', 'text/vnd.mermaid');
     public static readonly JS = new KnownFileType('js', 'application/javascript');
     public static readonly JPG = new KnownFileType('jpg', 'image/jpeg');
 

src/core/statistics.ts

@@ -285,6 +285,12 @@ export class ChartDateAggregationType {
     }
 }
 
+export enum ExportMermaidChartType {
+    PieChart = 'pieChart',
+    XYChartBar = 'xyChartBar',
+    XYChartLine = 'xyChartLine'
+}
+
 export const DEFAULT_CATEGORICAL_CHART_DATA_RANGE: DateRange = DateRange.ThisMonth;
 export const DEFAULT_TREND_CHART_DATA_RANGE: DateRange = DateRange.ThisYear;
 export const DEFAULT_ASSET_TRENDS_CHART_DATA_RANGE: DateRange = DateRange.ThisYear;