1 files changed, 70 insertions, 0 deletions
diff --git a/dozentenmodulserver/src/main/java/org/openslx/bwlp/sat/util/MailTemplate.java b/dozentenmodulserver/src/main/java/org/openslx/bwlp/sat/util/MailTemplate.java
new file mode 100644
index 00000000..368c43ec
--- /dev/null
+++ b/dozentenmodulserver/src/main/java/org/openslx/bwlp/sat/util/MailTemplate.java
@@ -0,0 +1,70 @@
+package org.openslx.bwlp.sat.util;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.Map;
+
+/**
+ * stores a mail template and offers methods to place variables
+ **/
+public class MailTemplate {
+
+	private ArrayList<String> snippets = new ArrayList<>();
+	private ArrayList<String> identifiers = new ArrayList<>();
+
+	public MailTemplate(String raw_template) {
+		this.parseTemplate(raw_template);
+	}
+
+	public String format(Map<String, String> vars) {
+		Iterator<String> it_snippets = snippets.iterator();
+		Iterator<String> it_identifiers = identifiers.iterator();
+
+		StringBuilder sb = new StringBuilder();
+		
+		while (true) {
+			boolean progress = false;
+			if (it_snippets.hasNext()) {
+				sb.append(it_snippets.next());
+				progress = true;
+			}
+			if (it_identifiers.hasNext()) {				
+				sb.append(vars.get(it_identifiers.next()));
+				progress = true;
+			}
+			if ( progress == false) {
+				break;
+			}
+		}
+		return sb.toString();
+	}
+
+	/*
+	 * read the raw string from % to % and the fragments either into snippets or
+	 * variables
+	 */
+	private void parseTemplate(String raw) {
+		int i = 0;
+		while (true) {
+			int begin = raw.indexOf("%", i);
+			int end = raw.indexOf("%", begin + 1);
+			
+			if (begin == -1) {
+				/* no variable anymore, so just add a snippet until the end */
+				String snippet = raw.substring(i);
+				this.snippets.add(snippet);
+				break;
+			}			
+			String snippet = raw.substring(i, begin);
+			String identifier = raw.substring(begin + 1, end);
+						
+			this.snippets.add(snippet);
+			this.identifiers.add(identifier);
+			
+			i = end + 1;
+			
+		}		
+	}
+	
+
+}