Add .gitattributes, git template

type

.git.template

@@ -0,0 +1,32 @@
+# If applied, this commit will ...
+
+# Why was this change necessary? Improvements brought about by the
+# change.
+
+# End
+
+# Format
+# --------------------
+# (If applied, this commit will...) <subject> (Max 72 char)
+# |<----   Preferably using up to 50 chars   --->|<------------------->|
+# Example:
+# Implement automated commit messages
+
+# (Optional) Explain why this change is being made
+# |<----   Try To Limit Each Line to a Maximum Of 72 Characters   ---->|
+
+# (Optional) Provide links or keys to any relevant tickets, articles or other resources
+# Example: Github issue #23
+
+# --- COMMIT END ---
+#
+# Remember to:
+#   * Capitalize the subject line
+#   * Use the imperative mood in the subject line
+#   * Do not end the subject line with a period
+#   * Separate subject from body with a blank line
+#   * Use the body to explain what and why vs. how
+#   * Can use multiple lines with "-" or "*" for bullet points in body
+# --------------------
+
+# Continuous integration messages

.gitattributes

@@ -0,0 +1,2 @@
+*.php text eol=lf diff=php
+*.css text eol=lf diff=css

MD_STD.php

@@ -378,4 +378,35 @@ final class MD_STD {
 
     }
 
+    /**
+     * Checks if a file exists, with one of the expected mime types.
+     *
+     * @param string   $filepath          File path of the file that needs to exist.
+     * @param string[] $accepted_mimetype Mime type the file should have.
+     *
+     * @return void
+     */
+    public static function ensure_file(string $filepath, array $accepted_mimetype = []) {
+
+        if (!\file_exists($filepath)) {
+            throw new MDFileDoesNotExist("File " . basename($filepath) . " does not exist");
+        }
+
+        // Check for mime type follows. If no check is to be done, ignore this.
+        if (empty($accepted_mimetype)) {
+            return;
+        }
+
+        $finfo = \finfo_open(FILEINFO_MIME_TYPE);
+        if (!($mime_type = finfo_file($finfo, $filepath))) {
+            throw new MDWrongFileType("Cannot get mime type of file: " . basename($filepath));
+        }
+        \finfo_close($finfo);
+
+        if (!\in_array($mime_type, $accepted_mimetype)) {
+            throw new MDWrongFileType("Incorrect mime type of file " . \basename($filepath) . ". Mime type is " . \mime_content_type($filepath) . ", accepted any of ['" . \implode("', '", $accepted_mimetype) . "']");
+        }
+
+    }
+
 }