Fix Bad Request on Open GitHub Issue report when URL is too long

src/main/kotlin/com/sourcegraph/cody/error/CodyError.kt

@@ -1,9 +1,9 @@
 package com.sourcegraph.cody.error
 
 data class CodyError(
-    val title: String?,
+    val title: String,
     val pluginVersion: String?,
-    val ideVersion: String?,
+    val ideVersion: String,
     val additionalInfo: String?,
-    val stacktrace: String?
+    val stacktrace: String
 )

src/main/kotlin/com/sourcegraph/cody/error/CodyErrorFormatter.kt

@@ -7,7 +7,6 @@ object CodyErrorFormatter {
               "Plugin version" to error.pluginVersion,
               "IDE version" to error.ideVersion,
               "Additional information" to error.additionalInfo,
-              "Exception" to error.title,
               "Stacktrace" to error.stacktrace)
           .filterValues { it != null }
           .map { toLabeledCodeBlock(it.key, it.value!!) }

src/main/kotlin/com/sourcegraph/cody/error/CodyErrorSubmitter.kt

@@ -1,7 +1,6 @@
 package com.sourcegraph.cody.error
 
 import com.intellij.ide.BrowserUtil
-import com.intellij.ide.plugins.IdeaPluginDescriptor
 import com.intellij.openapi.application.ApplicationInfo
 import com.intellij.openapi.diagnostic.ErrorReportSubmitter
 import com.intellij.openapi.diagnostic.IdeaLoggingEvent
@@ -25,9 +24,8 @@ class CodyErrorSubmitter : ErrorReportSubmitter() {
       if (events.isNotEmpty()) {
         val event = events.first()
         val error = getErrorDetails(event, additionalInfo)
-        val issueTitle = "bug: ${error.title}"
-        val formattedError = CodyErrorFormatter.formatToMarkdown(error)
-        val url = encodeIssue(issueTitle, formattedError)
+        val markdownText = CodyErrorFormatter.formatToMarkdown(error)
+        val url = encodeIssue(error.title, markdownText)
         BrowserUtil.browse(url)
       }
     } catch (e: Exception) {
@@ -40,11 +38,11 @@ class CodyErrorSubmitter : ErrorReportSubmitter() {
 
   private fun getErrorDetails(event: IdeaLoggingEvent, additionalInfo: String?) =
       CodyError(
-          title = event.throwableText.lines().first(),
-          pluginVersion = (pluginDescriptor as? IdeaPluginDescriptor)?.version,
+          title = trimPostfix("bug: " + event.throwableText.lines().first(), 128),
+          pluginVersion = pluginDescriptor?.version,
           ideVersion = ApplicationInfo.getInstance().build.toString(),
           additionalInfo = additionalInfo,
-          stacktrace = event.throwableText)
+          stacktrace = trimPostfix(event.throwableText, 6500)) // max length for gh links is 8192
 
   private fun encodeIssue(title: String, body: String): String =
       "https://github.com/sourcegraph/jetbrains/issues/new" +
@@ -53,4 +51,9 @@ class CodyErrorSubmitter : ErrorReportSubmitter() {
           "&body=${encode(body)}"
 
   private fun encode(text: String) = URLEncoder.encode(text, "UTF-8")
+
+  private fun trimPostfix(text: String, maxLength: Int): String {
+    val postfix = " (...)"
+    return if (text.length > maxLength) text.take(maxLength - postfix.length) + postfix else text
+  }
 }

src/test/kotlin/com/sourcegraph/cody/error/CodyErrorFormatterTest.kt

@@ -23,7 +23,6 @@ class CodyErrorFormatterTest : TestCase() {
         """
             Plugin version: ```5.2.18066-nightly```
             IDE version: ```IU-233.11799.241```
-            Exception: ```java.lang.NullPointerException```
             Stacktrace:
             ```text
             java.lang.NullPointerException: Exception description
@@ -34,10 +33,4 @@ class CodyErrorFormatterTest : TestCase() {
             .trimIndent()
     assertEquals(expectedMarkdown, markdown)
   }
-
-  fun `test null report results empty markdown`() {
-    val error = CodyError(null, null, null, null, null)
-    val markdown = CodyErrorFormatter.formatToMarkdown(error)
-    assertEquals("", markdown)
-  }
 }