1312: Implement initial vocabulary browsing mechanism

Task-Url: https://pm.winseda.de/issues/1312

search/incl/simple_options.jsp

@@ -28,3 +28,20 @@
 		<input type="hidden" id="selected-datasources" name="selected-datasources" value="[]" />
 	</div>
 </nav>
+
+<nav class="sidebar-block">
+	<h2><s:message code="~eu.dariah.de.minfba.search.options.available_filters" /></h2>
+
+	<c:forEach items="${availableFilters}" var="filter" varStatus="filterStatus">
+		<h3><s:message code="${filter.displayCode}" /></h3>
+		<ul id="search-available-filter-${filterStatus.index}" class="search-available-filter">
+			<c:forEach items="${filter.terms}" var="term" varStatus="termStatus">
+				<li ${termStatus.index>4 ? "class='hide'" : ""}><button class="btn btn-inline" onclick="search.addFilterTerm('${filter.label}', '${term.type}', '${term.term}');">${term.term} (${term.count})</button></li>			
+			</c:forEach>
+		</ul>
+		<c:if test="${filter.totalSize > 4}">
+			<button id="btn-search-available-filter-more-${filterStatus.index}" class="btn btn-inline" onclick="search.showMoreFilterTerms('${filterStatus.index}');">~more..</button>		
+		</c:if>
+	</c:forEach>
+	<input type="hidden" id="selected-filters" name="selected-filters" value="[]" />
+</nav>
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