Support aar diff html reports

Author: jzbrooks

reports/src/main/kotlin/com/jakewharton/diffuse/diff/AarDiff.kt

@@ -3,6 +3,7 @@ package com.jakewharton.diffuse.diff
 import com.jakewharton.diffuse.format.Aar
 import com.jakewharton.diffuse.format.ApiMapping
 import com.jakewharton.diffuse.report.Report
+import com.jakewharton.diffuse.report.html.AarDiffHtmlReport
 import com.jakewharton.diffuse.report.text.AarDiffTextReport
 
 internal class AarDiff(
@@ -16,4 +17,5 @@ internal class AarDiff(
   val manifest = ManifestDiff(oldAar.manifest, newAar.manifest)
 
   override fun toTextReport(): Report = AarDiffTextReport(this)
+  override fun toHtmlReport(): Report = AarDiffHtmlReport(this)
 }

reports/src/main/kotlin/com/jakewharton/diffuse/report/html/AarDiffHtmlReport.kt

@@ -0,0 +1,83 @@
+package com.jakewharton.diffuse.report.html
+
+import com.jakewharton.diffuse.diff.AarDiff
+import com.jakewharton.diffuse.diff.toDetailReport
+import com.jakewharton.diffuse.diff.toHtmlSummary
+import com.jakewharton.diffuse.diff.toSummaryTable
+import com.jakewharton.diffuse.format.ArchiveFile.Type
+import com.jakewharton.diffuse.report.Report
+import kotlinx.html.body
+import kotlinx.html.br
+import kotlinx.html.details
+import kotlinx.html.h2
+import kotlinx.html.head
+import kotlinx.html.html
+import kotlinx.html.span
+import kotlinx.html.stream.appendHTML
+import kotlinx.html.style
+import kotlinx.html.summary
+import kotlinx.html.unsafe
+
+internal class AarDiffHtmlReport(private val aarDiff: AarDiff) : Report {
+  override fun write(appendable: Appendable) {
+    appendable.appendHTML().html {
+    head {
+      style(type = "text/css") {
+        unsafe {
+          raw(
+            """
+              table{
+                border-collapse:collapse;
+                border:1px solid #000;
+              }
+  
+              table td{
+                border:1px solid #000;
+              }
+              """.trimIndent(),
+          )
+        }
+      }
+    }
+
+    body {
+      h2 { +"Summary" }
+
+      span { +"OLD: ${aarDiff.oldAar.filename}" }
+      br()
+      span { +"NEW: ${aarDiff.newAar.filename}" }
+      br()
+      br()
+
+      toSummaryTable(
+        "AAR",
+        aarDiff.archive,
+        Type.AAR_TYPES,
+        skipIfEmptyTypes = setOf(Type.JarLibs, Type.ApiJar, Type.LintJar, Type.Native, Type.Res),
+      )
+
+      br()
+
+      toHtmlSummary("", aarDiff.jars)
+
+      if (aarDiff.archive.changed) {
+        br()
+        details {
+          summary { +"JAR" }
+          toDetailReport(aarDiff.archive)
+        }
+      }
+
+      if (aarDiff.jars.changed) {
+        br()
+        details {
+          summary { +"CLASSFILES" }
+          toDetailReport(aarDiff.jars)
+        }
+      }
+    }
+  }
+}
+
+override fun toString() = buildString { write(this) }
+}