From 675479bda45751f058a98ac6eca33fdc9d71bcb9 Mon Sep 17 00:00:00 2001
From: Dalibor Kundrat <54806834+damikun@users.noreply.github.com>
Date: Wed, 28 Apr 2021 21:59:41 +0200
Subject: [PATCH] relay-persisted-converter

Converter script - Converts Relay persisted output to HC storage format.... Related to documentations
---
 .../relay-persisted-converter.js              | 146 ++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100644 misc/Persisted-queries/relay-persisted-converter.js

diff --git a/misc/Persisted-queries/relay-persisted-converter.js b/misc/Persisted-queries/relay-persisted-converter.js
new file mode 100644
index 0000000..0e23ac4
--- /dev/null
+++ b/misc/Persisted-queries/relay-persisted-converter.js
@@ -0,0 +1,146 @@
+#! /usr/bin/env node
+
+const fs = require("fs");
+
+//-----------------------------------------------
+// Info
+//-----------------------------------------------
+
+/*
+ - This script converts standard relay output of .json to Hotchocolate server presisted query input format
+ - HC require each query to be in separate file named by Query Hash whith file type .graphql {Hash}.graphql
+ 
+ !!! All files in output directory ending with .graphql will be first deleted (prevents old files to presist). Make shure you provide right directory!
+
+ Put script after your standard relay generation:
+
+  "scripts": {
+    "relay": "relay-compiler --persist-output persisted-output/persisted-queries.json && node relay_converter.js persisted-output/persisted-queries.json persisted-output",
+   }
+
+   You can provide source and output argumnets: "node relay_converter.js {source_file_path} {output_directory_path}""
+
+   default values are: "node relay_converter.js persisted-output/persisted-queries.json persisted-output"
+
+   DONT define output folder as relay scope folder.. this directory must be out of scope defined in relay.config.js
+*/
+
+//-----------------------------------------------
+// Handle input arguments
+//-----------------------------------------------
+
+//By default expect source file to be in "persisted-output" dir
+let PATH_RELAY_SOURCE_FILE = "persisted-output/persisted-queries.json";
+//By default output dirrectory is "persisted-output"
+let PATH_OUTPUT_DIRECTORY = "persisted-output";
+
+// Tryes gets arguments
+var myArgs = process?.argv?.slice(2);
+
+if (myArgs?.length === 1) {
+  throw "Invalid number of argumenst -> must be 2 (source and destination path)";
+} else if (myArgs?.length === 2) {
+  // In case custom souce and output are provided will be over-set...
+  PATH_RELAY_SOURCE_FILE = myArgs[0];
+  PATH_OUTPUT_DIRECTORY = myArgs[1];
+}
+
+// Validate if Source file exist
+if (!fs.existsSync(PATH_RELAY_SOURCE_FILE)) {
+  throw new Error(`Source file: ${PATH_RELAY_SOURCE_FILE} was not found`);
+}
+// Validate if Output directory exist
+if (!fs.existsSync(PATH_OUTPUT_DIRECTORY)) {
+  throw new Error(`Output directory: ${PATH_OUTPUT_DIRECTORY} was not found`);
+}
+
+const SOURCE_FILE_NAME = PATH_RELAY_SOURCE_FILE.replace(/^.*[\\\/]/, "");
+
+// Glob variables
+var failed_generated_counter = 0;
+var success_generated_counter = 0;
+var skipped_delete_counter = 0;
+var deleted_counter = 0;
+
+//-----------------------------------------------
+// Clean output folder
+//-----------------------------------------------
+
+const removeDir = function (path) {
+  const files = fs.readdirSync(path);
+
+  if (files && files.length > 0) {
+    files.forEach(function (filename) {
+      if (SOURCE_FILE_NAME === filename) return;
+
+      let file_path = `${path}/${filename}`;
+
+      if (fs.statSync(file_path)?.isDirectory()) {
+        // removeDir(file_path);
+        skipped_delete_counter++;
+      } else {
+        const fileName_Arr = filename.split(".");
+        if (
+          fileName_Arr &&
+          fileName_Arr.length > 0 &&
+          fileName_Arr[1] === "graphql"
+        ) {
+          fs.unlinkSync(file_path);
+          console.log(`${filename} --> Removed`);
+          deleted_counter++;
+        } else {
+          skipped_delete_counter++;
+        }
+      }
+    });
+  }
+};
+
+removeDir(PATH_OUTPUT_DIRECTORY);
+
+//-----------------------------------------------
+// Async files generation
+//-----------------------------------------------
+
+// Read file from Source path
+let rawdata = fs.readFileSync(PATH_RELAY_SOURCE_FILE);
+
+// Parse json to js object
+let JsonObject = JSON.parse(rawdata);
+
+const Promises = Object.keys(JsonObject).map((prop) => {
+  const data_to_Write = JsonObject[prop]?.replace(/\n/g, "")?.toString();
+  const file_name = prop;
+
+  // write JSON query to a file with its query hash
+  return fs.promises
+    .writeFile(`${PATH_OUTPUT_DIRECTORY}/${file_name}.graphql`, data_to_Write)
+    .then(() => {
+      success_generated_counter++;
+      console.log(`${file_name} --> OK`);
+    })
+    .catch((err) => {
+      success_generated_counter++;
+      console.log(`\n${file_name} --> FAILED \n`);
+      console.log(err);
+    });
+});
+
+//-----------------------------------------------
+// Await and write results to console
+//-----------------------------------------------
+
+Promise.all(Promises)
+  .then((_) => {
+    console.log(`\n ----- CONVERSION COMPLETED ------ `);
+    console.log(
+      `Deleted fles: ${deleted_counter}, Skipped delete: ${skipped_delete_counter}`
+    );
+    console.log(
+      `Generated success: ${success_generated_counter}, Generated failed: ${failed_generated_counter} \n`
+    );
+  })
+  .catch((err) => {
+    console.log(`\n ----- CONVERSION FAILED ------ \n`);
+    console.error(err);
+  });