🚧 Add template renderer

diff --git a/src/main/kotlin/net/pterodactylus/sone/web/page/TemplateRenderer.kt b/src/main/kotlin/net/pterodactylus/sone/web/page/TemplateRenderer.kt
new file mode 100644 (file)
index 0000000..21eeb2a
--- /dev/null
+++ b/src/main/kotlin/net/pterodactylus/sone/web/page/TemplateRenderer.kt
@@ -0,0 +1,16 @@
+package net.pterodactylus.sone.web.page
+
+import net.pterodactylus.util.template.*
+import java.io.*
+import javax.inject.*
+
+class TemplateRenderer @Inject constructor(private val templateContextFactory: TemplateContextFactory) {
+
+       fun render(template: Template, processor: (TemplateContext) -> Unit = {}): String =
+                       templateContextFactory.createTemplateContext().let { templateContext ->
+                               templateContext.mergeContext(template.initialContext)
+                               processor(templateContext)
+                               StringWriter().also { template.render(templateContext, it) }.toString()
+                       }
+
+}

diff --git a/src/test/kotlin/net/pterodactylus/sone/web/page/TemplateRendererTest.kt b/src/test/kotlin/net/pterodactylus/sone/web/page/TemplateRendererTest.kt
new file mode 100644 (file)
index 0000000..cb03c61
--- /dev/null
+++ b/src/test/kotlin/net/pterodactylus/sone/web/page/TemplateRendererTest.kt
@@ -0,0 +1,60 @@
+package net.pterodactylus.sone.web.page
+
+import com.google.inject.*
+import net.pterodactylus.sone.test.*
+import net.pterodactylus.sone.utils.*
+import net.pterodactylus.util.template.*
+import net.pterodactylus.util.web.*
+import org.hamcrest.MatcherAssert.*
+import org.hamcrest.Matchers.*
+import org.junit.*
+import org.junit.rules.*
+
+class TemplateRendererTest {
+
+       @Rule
+       @JvmField
+       val expectedException: ExpectedException = ExpectedException.none()
+       private val templateContextFactory = TemplateContextFactory()
+       private val templateRenderer = TemplateRenderer(templateContextFactory)
+
+       @Test
+       fun `renderer can render template`() {
+               val template = "foo".asTemplate()
+               val rendered = templateRenderer.render(template)
+               assertThat(rendered, equalTo("foo"))
+       }
+
+       @Test
+       fun `renderer merges template contexts from template and context factory`() {
+               templateContextFactory.addTemplateObject("a", 1)
+               val template = "<%a><%b>".asTemplate()
+               template.initialContext.set("b", 2)
+               val rendered = templateRenderer.render(template)
+               assertThat(rendered, equalTo("12"))
+       }
+
+       @Test
+       fun `template context can be processed`() {
+               templateContextFactory.addTemplateObject("a", 1)
+               val template = "<%a><%b><%c>".asTemplate()
+               template.initialContext.set("b", 2)
+               val rendered = templateRenderer.render(template) { templateContext -> templateContext.set("c", 3) }
+               assertThat(rendered, equalTo("123"))
+       }
+
+       @Test
+       fun `redirect exceptions are thrown`() {
+               expectedException.expect(RedirectException::class.java)
+               templateRenderer.render(Template()) { _ -> throw RedirectException("foo") }
+       }
+
+       @Test
+       fun `template renderer can be created by guice`() {
+               val injector = Guice.createInjector(
+                               TemplateContextFactory::class.isProvidedByMock()
+               )
+               assertThat(injector.getInstance<TemplateRenderer>(), notNullValue())
+       }
+
+}