Mercurial > hg > LightPIT / file revision

 /*

  * Copyright 2021 Mike Becker. All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions are met:

  *

  * 1. Redistributions of source code must retain the above copyright

  * notice, this list of conditions and the following disclaimer.

  *

  * 2. Redistributions in binary form must reproduce the above copyright

  * notice, this list of conditions and the following disclaimer in the

  * documentation and/or other materials provided with the distribution.

  *

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE

  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

  */

 package de.uapcore.lightpit.servlet

 import com.github.difflib.text.DiffRow

 import com.github.difflib.text.DiffRowGenerator

 import de.uapcore.lightpit.AbstractServlet

 import de.uapcore.lightpit.HttpRequest

 import de.uapcore.lightpit.dao.DataAccessObject

 import de.uapcore.lightpit.entities.IssueHistoryData

 import de.uapcore.lightpit.entities.IssueHistoryEntry

 import de.uapcore.lightpit.viewmodel.IssueDiff

 import de.uapcore.lightpit.viewmodel.IssueFeed

 import de.uapcore.lightpit.viewmodel.IssueFeedEntry

 import java.text.SimpleDateFormat

 import javax.servlet.annotation.WebServlet

 @WebServlet(urlPatterns = ["/feed/*"])

 class FeedServlet : AbstractServlet() {

     init {

         get("/%project/issues.rss", this::issues)

     }

     private fun fullContent(issue: IssueHistoryData) = IssueDiff(

         issue.id,

         issue.subject,

         issue.component,

         issue.status.name,

         issue.category.name,

         issue.subject,

         issue.description.replace("\r", ""),

         issue.assignee,

         issue.eta?.let { SimpleDateFormat("dd.MM.yyyy").format(it) } ?: "",

         issue.affected,

         issue.resolved

     )

     private fun diffContent(cur: IssueHistoryData, next: IssueHistoryData): IssueDiff {

         val generator = DiffRowGenerator.create()

             .showInlineDiffs(true)

             .mergeOriginalRevised(true)

             .inlineDiffByWord(true)

             .oldTag { start -> if (start) "<strike style=\"color:red\">" else "</strike>" }

             .newTag { start -> if (start) "<i style=\"color: green\">" else "</i>" }

             .build()

         val prev = fullContent(next)

         val diff = fullContent(cur)

         val result = generator.generateDiffRows(

             listOf(

                 prev.subject, prev.component, prev.status,

                 prev.category, prev.assignee, prev.eta, prev.affected, prev.resolved

             ),

             listOf(

                 diff.subject, diff.component, diff.status,

                 diff.category, diff.assignee, diff.eta, diff.affected, diff.resolved

             )

         )

         diff.subject = result[0].oldLine

         diff.component = result[1].oldLine

         diff.status = result[2].oldLine

         diff.category = result[3].oldLine

         diff.assignee = result[4].oldLine

         diff.eta = result[5].oldLine

         diff.affected = result[6].oldLine

         diff.resolved = result[7].oldLine

         diff.description = generator.generateDiffRows(

             prev.description.split('\n'),

             diff.description.split('\n')

         ).joinToString("<br>", transform = DiffRow::getOldLine)

         return diff

     }

     /**

      * Generates the feed entries.

      * Assumes that [historyEntry] is already sorted by timestamp (descending).

      */

     private fun generateFeedEntries(historyEntry: List<IssueHistoryEntry>): List<IssueFeedEntry> =

         if (historyEntry.isEmpty()) {

             emptyList()

         } else {

             historyEntry.groupBy { it.data.id }.mapValues { (_, history) ->

                 history.zipWithNext().map { (cur, next) ->

                     IssueFeedEntry(

                         cur.time, cur.type, diffContent(cur.data, next.data)

                     )

                 }.plus(

                     history.last().let { IssueFeedEntry(it.time, it.type, fullContent(it.data)) }

                 )

             }.flatMap { it.value }.sortedByDescending { it.time }

         }

     private fun issues(http: HttpRequest, dao: DataAccessObject) {

         val project = http.pathParams["project"]?.let { dao.findProjectByNode(it) }

         if (project == null) {

             http.response.sendError(404)

             return

         }

         val days = http.param("days")?.toIntOrNull() ?: 30

         val issueHistory = dao.listIssueHistory(project.id, days)

         // TODO: add comment history depending on parameter

         http.view = IssueFeed(project, generateFeedEntries(issueHistory))

         http.renderFeed("issues-feed")

     }

 }