From 2e3e46df0ec083e2689c2bc1095a2c4734f71e3c Mon Sep 17 00:00:00 2001
From: Eric Seigers <eric.seigers@rakuten.com>
Date: Fri, 9 Oct 2020 12:17:37 +0900
Subject: [PATCH] add save to disk option

---
 README.md  |  1 +
 lib/ssi.js | 13 ++++++++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 9822bf9..d0da12d 100644
--- a/README.md
+++ b/README.md
@@ -59,3 +59,4 @@ module: {
 | defaultCharset   | string        |    utf-8       | force the file reader to convert the file content into a specific charset |
 | quietError       | boolean       |    false       | if the file cannot be found on local or online replace it with an error message or not |
 | onFileMatch      | function      |    null        | callback on each SSI line match with 3 parameters : filePath&#60;string&#62;, fileContent&#60;string&#62;, isLocal&#60;boolean&#62;.<br> If you return a string it will override and replace the content |
+| saveToDisk   | boolean        |    false       | saves files fetched online to disk (if not present) |
diff --git a/lib/ssi.js b/lib/ssi.js
index f5cbd39..b9dea74 100644
--- a/lib/ssi.js
+++ b/lib/ssi.js
@@ -2,6 +2,7 @@ const request = require('then-request');
 const iconv = require('iconv-lite');
 const chardet = require('chardet');
 const fs = require('fs');
+const path = require('path');
 
 /**
  * take HTLM string scan it to find ssi include string
@@ -24,7 +25,8 @@ const SSI = function (param) {
     disableLocalScan: false,
     includesMatcher: /<!--\s?#\s?include\s+(?:virtual|file)="([^"]+)"(?:\s+stub="(\w+)")?\s?-->/,
     onFileMatch: () => null,
-  }
+    saveToDisk: false,
+  };
   const options = {
     ...defaultOptions,
     ...param,
@@ -73,6 +75,15 @@ const SSI = function (param) {
         content = iconv.decode(res.body, charset);
       }
 
+      const target = `${options.localPath}${location}`;
+
+      if (options.saveToDisk && !fs.existsSync(target)) {
+        const targetDir = path.dirname(target);
+
+        fs.mkdirSync(targetDir, { recursive: true });
+        fs.writeFileSync(target, content);
+      }
+
       const modifiedContent = options.onFileMatch(url, content, false);
       return modifiedContent || content;
     } catch(e) {