feat: add automatic mapping generation

Fixes #6

src/cli.ts

@@ -22,6 +22,7 @@ import {
   readFilePromisified,
   toArray,
 } from './common';
+import {generateTemplate} from './mapping';
 import {pack} from './pack';
 import {
   gatherRouteInformation,
@@ -77,6 +78,30 @@ commander
     Logger.ok(`Route documentation written to ${mdPath}.`);
   });
 
+commander
+  .command('mapping <srcPath> <destPath> [ignoredTags]')
+  .action(async (relativeSrcPath, relativeMappingPath, ignoredTags) => {
+    // get absolute paths
+    const srcPath = resolve(relativeSrcPath);
+    const mappingPath = resolve(relativeMappingPath);
+
+    let ignoredTagsList: string[] = [];
+    if (typeof ignoredTags === 'string') {
+      ignoredTagsList = ignoredTags.split(',');
+    }
+
+    // get project reflection
+    const projectReflection = getProjectReflection(srcPath);
+
+    const mapping = generateTemplate(projectReflection, ignoredTagsList);
+
+    // write documentation to file
+    // tslint:disable-next-line:no-magic-numbers
+    writeFileSync(mappingPath, JSON.stringify(mapping.template, null, 2));
+
+    Logger.ok(`Elasticsearch mapping written to ${mappingPath}.`);
+  });
+
 commander
   .command('schema <srcPath> <schemaPath>')
   .action(async (relativeSrcPath, relativeSchemaPath) => {