Merge plugins repo into mono

plugins/filter-xpath/package.json

@@ -0,0 +1,13 @@
+{
+  "name": "@yaakapp/filter-xpath",
+  "private": true,
+  "version": "0.0.1",
+  "scripts": {
+    "build": "yaakcli build ./src/index.js",
+    "dev": "yaakcli dev ./src/index.js"
+  },
+  "dependencies": {
+    "@xmldom/xmldom": "^0.8.10",
+    "xpath": "^0.0.34"
+  }
+}

plugins/filter-xpath/src/index.ts

@@ -0,0 +1,21 @@
+import { DOMParser } from '@xmldom/xmldom';
+import { PluginDefinition } from '@yaakapp/api';
+import xpath from 'xpath';
+
+export const plugin: PluginDefinition = {
+  filter: {
+    name: 'XPath',
+    description: 'Filter XPath',
+    onFilter(_ctx, args) {
+      const doc = new DOMParser().parseFromString(args.payload, 'text/xml');
+      const result = xpath.select(args.filter, doc, false);
+
+      if (Array.isArray(result)) {
+        return { filtered: result.map(r => String(r)).join('\n') };
+      } else {
+        // Not sure what cases this happens in (?)
+        return { filtered: String(result) };
+      }
+    },
+  },
+};