Adding search/symbol endpoint

package.json

@@ -17,6 +17,8 @@
     "@nestjs/testing": "^4.5.5",
     "@nestjs/websockets": "^4.5.8",
     "js-yaml": "^3.11.0",
+    "lodash": "^4.17.5",
+    "lodash-es": "^4.17.7",
     "redis": "^2.7.1",
     "reflect-metadata": "^0.1.12",
     "rxjs": "^5.5.6",

src/ERC20Tokens/erc20-tokens.controller.ts

@@ -1,6 +1,9 @@
 import { Controller, Get, Param } from '@nestjs/common';
 import * as path from 'path';
 import * as fs from 'fs';
+import {find, startsWith, without} from 'lodash';
+// tslint:disable-next-line:no-var-requires
+const db = require('../../assets/db.json');
 // tslint:disable-next-line:no-var-requires
 const yaml = require('js-yaml');
 const tokenYalmDirectory = path.join(__dirname, '..', '..', '/assets/ERC20-tokens/');
@@ -21,6 +24,38 @@ export class ERC20TokensController {
     }
   }
 
+  @Get('/json')
+  getJson() {
+    try {
+      const res = [];
+      const json = [];
+
+      fs.readdirSync(tokenYalmDirectory).forEach(file => {
+        res.push(file.replace('.yaml', ''));
+      });
+
+      res.forEach( o => {
+        const doc = yaml.safeLoad(fs.readFileSync(`${tokenYalmDirectory}${o}.yaml`, 'utf8'));
+        json.push(doc);
+      });
+
+      fs.writeFile(tokenYalmDirectory + '../db.json', JSON.stringify(json), (err) => {
+          if (err) {
+              return err;
+          }
+      });
+
+      return json;
+    } catch (e) {
+      return [];
+    }
+  }
+
+  @Get('/search/symbol/:v')
+  search(@Param() params) {
+    return without(db.map(i => startsWith(i.symbol, params.v) ? i : undefined), undefined) || [];
+  }
+
   @Get(':contractAddress')
   findOne(@Param() params) {
     try {