document digests and reduction in use of tuples

1 files changed, 38 insertions, 16 deletions

diff --git a/src/sisudoc/io_in/read_source_files.d b/src/sisudoc/io_in/read_source_files.d
index 4ba0b4f..8d814fc 100644
--- a/src/sisudoc/io_in/read_source_files.d
+++ b/src/sisudoc/io_in/read_source_files.d
@@ -56,6 +56,7 @@ module sisudoc.io_in.read_source_files;
 @safe:
 template spineRawMarkupContent() {
   import
+    std.digest.sha,
     std.file,
     std.path;
   import
@@ -67,6 +68,14 @@ template spineRawMarkupContent() {
   static auto rgx = RgxI();
   mixin spineRgxFiles;
   static auto rgx_files = RgxFiles();
+  struct ST_doc_parts {
+    char[]     header_raw;
+    char[][]   sourcefile_body_content;
+    string[]   insert_file_list;
+    string[]   images_list;
+    ubyte[32]  header_raw_digest;
+    ubyte[32]  src_txt_digest;
+  }
   string[] _images=[];
   string[] _extract_images(S)(S content_block) {
     string[] images_;
@@ -86,7 +95,9 @@ template spineRawMarkupContent() {
     char[],   "header",
     char[][], "src_txt",
     string[], "insert_files",
-    string[], "images"
+    string[], "images",
+    ubyte[32], "header_digest",
+    ubyte[32], "src_txt_digest"
   );
   auto spineRawMarkupContent(O,Fn)(O _opt_action, Fn fn_src) {
     auto _0_header_1_body_content_2_insert_filelist_tuple
@@ -100,43 +111,50 @@ template spineRawMarkupContent() {
         = raw.markupSourceReadIn(fn_src);
       return source_txt_str;
     }
-    final auto sourceContentSplitIntoHeaderAndBody(O)(
+    final ST_doc_parts sourceContentSplitIntoHeaderAndBody(O)(
       O         _opt_action,
       in string source_txt_str,
       in string fn_src=""
     ) {
       auto raw = MarkupRawUnit();
-      string[] insert_file_list;
-      string[] images_list;
+      string[] insert_file_list_get;
+      string[] images_list_get;
       HeaderContentInsertsImages t
         = raw.markupSourceHeaderContentRawLineTupleArray(source_txt_str);
       char[] header_raw = t.header;
+      ubyte[32] header_raw_digest = t.header.sha256Of;
       char[][] sourcefile_body_content = t.src_txt;
       if (fn_src.match(rgx_files.src_fn_master)) { // filename with path needed if master file (.ssm) not otherwise
         auto ins = Inserts();
         ContentsInsertsImages tu
           = ins.scan_master_src_for_insert_files_and_import_content(_opt_action, sourcefile_body_content, fn_src);
         sourcefile_body_content = tu.contents;
-        insert_file_list = tu.insert_files.dup;
-        images_list = tu.images.dup;
+        insert_file_list_get = tu.insert_files.dup;
+        images_list_get = tu.images.dup;
       } else if (_opt_action.source || _opt_action.pod) {
         auto ins = Inserts();
         ContentsInsertsImages tu
           = ins.scan_master_src_for_insert_files_and_import_content(_opt_action, sourcefile_body_content, fn_src);
-        images_list = tu.images.dup;
+        images_list_get = tu.images.dup;
       }
+      ubyte[32] src_txt_digest = sourcefile_body_content.sha256Of;
       string header_type = "";
-      t = tuple(
-        header_raw,
-        sourcefile_body_content,
-        insert_file_list,
-        images_list
-      );
-      return t;
+      ST_doc_parts ret;
+      {
+        ret.header_raw = t.header;
+        ret.sourcefile_body_content =  sourcefile_body_content;
+        ret.insert_file_list = insert_file_list_get;
+        ret.images_list = images_list_get;
+        ret.header_raw_digest = t.header.sha256Of;
+        ret.src_txt_digest = sourcefile_body_content.sha256Of;
+      }
+      return ret;
     }
   }
   struct MarkupRawUnit {
-    import std.file;
+    import
+      std.digest.sha,
+      std.file;
     final private string readInMarkupSource(in char[] fn_src) {
       enforce(
         exists(fn_src) != 0,
@@ -195,11 +213,15 @@ template spineRawMarkupContent() {
       char[] header = hc[0];
       char[] source_txt = hc[1];
       char[][] source_line_arr = markupSourceLineArray(source_txt);
+      ubyte[32] header_digest;
+      ubyte[32] src_txt_digest;
       HeaderContentInsertsImages t = tuple(
         header,
         source_line_arr,
         file_insert_list,
-        images_list
+        images_list,
+        header_digest,
+        src_txt_digest
       );
       return t;
     }