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package org.openslx.bwlp.sat.mail;
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<>();
private String raw;
public MailTemplate(String raw_template) {
this.raw = 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();
boolean progress;
do {
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;
}
} while (progress);
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;
}
}
public String getRaw() {
return this.raw;
}
}
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