universe@195: /*
universe@195:  * Copyright 2021 Mike Becker. All rights reserved.
universe@195:  *
universe@195:  * Redistribution and use in source and binary forms, with or without
universe@195:  * modification, are permitted provided that the following conditions are met:
universe@195:  *
universe@195:  * 1. Redistributions of source code must retain the above copyright
universe@195:  * notice, this list of conditions and the following disclaimer.
universe@195:  *
universe@195:  * 2. Redistributions in binary form must reproduce the above copyright
universe@195:  * notice, this list of conditions and the following disclaimer in the
universe@195:  * documentation and/or other materials provided with the distribution.
universe@195:  *
universe@195:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
universe@195:  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
universe@195:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
universe@195:  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
universe@195:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
universe@195:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
universe@195:  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
universe@195:  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
universe@195:  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
universe@195:  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
universe@195:  */
universe@195: 
universe@195: package de.uapcore.lightpit.servlet
universe@195: 
universe@236: import com.github.difflib.text.DiffRow
universe@236: import com.github.difflib.text.DiffRowGenerator
universe@195: import de.uapcore.lightpit.AbstractServlet
universe@195: import de.uapcore.lightpit.HttpRequest
universe@195: import de.uapcore.lightpit.dao.DataAccessObject
universe@235: import de.uapcore.lightpit.entities.IssueHistoryData
universe@235: import de.uapcore.lightpit.entities.IssueHistoryEntry
universe@235: import de.uapcore.lightpit.viewmodel.IssueDiff
universe@195: import de.uapcore.lightpit.viewmodel.IssueFeed
universe@235: import de.uapcore.lightpit.viewmodel.IssueFeedEntry
universe@235: import java.text.SimpleDateFormat
universe@195: import javax.servlet.annotation.WebServlet
universe@195: 
universe@236: 
universe@195: @WebServlet(urlPatterns = ["/feed/*"])
universe@195: class FeedServlet : AbstractServlet() {
universe@195: 
universe@195:     init {
universe@198:         get("/%project/issues.rss", this::issues)
universe@198:     }
universe@198: 
universe@235:     private fun fullContent(issue: IssueHistoryData) = IssueDiff(
universe@235:         issue.id,
universe@235:         issue.subject,
universe@235:         issue.component,
universe@235:         issue.status.name,
universe@235:         issue.category.name,
universe@235:         issue.subject,
universe@236:         issue.description.replace("\r", ""),
universe@235:         issue.assignee,
universe@235:         issue.eta?.let { SimpleDateFormat("dd.MM.yyyy").format(it) } ?: "",
universe@235:         issue.affected,
universe@235:         issue.resolved
universe@235:     )
universe@235: 
universe@235:     private fun diffContent(cur: IssueHistoryData, next: IssueHistoryData): IssueDiff {
universe@236:         val generator = DiffRowGenerator.create()
universe@236:             .showInlineDiffs(true)
universe@236:             .mergeOriginalRevised(true)
universe@236:             .inlineDiffByWord(true)
universe@236:             .oldTag { start -> if (start) "<strike style=\"color:red\">" else "</strike>" }
universe@236:             .newTag { start -> if (start) "<i style=\"color: green\">" else "</i>" }
universe@236:             .build()
universe@236: 
universe@235:         val prev = fullContent(next)
universe@235:         val diff = fullContent(cur)
universe@236: 
universe@236:         val result = generator.generateDiffRows(
universe@238:             listOf(
universe@238:                 prev.subject, prev.component, prev.status,
universe@238:                 prev.category, prev.assignee, prev.eta, prev.affected, prev.resolved
universe@238:             ),
universe@238:             listOf(
universe@238:                 diff.subject, diff.component, diff.status,
universe@238:                 diff.category, diff.assignee, diff.eta, diff.affected, diff.resolved
universe@238:             )
universe@236:         )
universe@236: 
universe@236:         diff.subject = result[0].oldLine
universe@236:         diff.component = result[1].oldLine
universe@236:         diff.status = result[2].oldLine
universe@236:         diff.category = result[3].oldLine
universe@236:         diff.assignee = result[4].oldLine
universe@236:         diff.eta = result[5].oldLine
universe@236:         diff.affected = result[6].oldLine
universe@236:         diff.resolved = result[7].oldLine
universe@236: 
universe@236:         diff.description = generator.generateDiffRows(
universe@236:             prev.description.split('\n'),
universe@236:             diff.description.split('\n')
universe@240:         ).joinToString("\n", transform = DiffRow::getOldLine)
universe@236: 
universe@235:         return diff
universe@235:     }
universe@235: 
universe@235:     /**
universe@235:      * Generates the feed entries.
universe@235:      * Assumes that [historyEntry] is already sorted by timestamp (descending).
universe@235:      */
universe@238:     private fun generateFeedEntries(historyEntry: List<IssueHistoryEntry>): List<IssueFeedEntry> =
universe@238:         if (historyEntry.isEmpty()) {
universe@238:             emptyList()
universe@238:         } else {
universe@238:             historyEntry.groupBy { it.data.id }.mapValues { (_, history) ->
universe@238:                 history.zipWithNext().map { (cur, next) ->
universe@238:                     IssueFeedEntry(
universe@238:                         cur.time, cur.type, diffContent(cur.data, next.data)
universe@238:                     )
universe@238:                 }.plus(
universe@238:                     history.last().let { IssueFeedEntry(it.time, it.type, fullContent(it.data)) }
universe@238:                 )
universe@238:             }.flatMap { it.value }.sortedByDescending { it.time }
universe@238:         }
universe@235: 
universe@195:     private fun issues(http: HttpRequest, dao: DataAccessObject) {
universe@198:         val project = http.pathParams["project"]?.let { dao.findProjectByNode(it) }
universe@198:         if (project == null) {
universe@198:             http.response.sendError(404)
universe@198:             return
universe@198:         }
universe@239:         val assignees = http.param("assignee")?.split(',')
universe@195: 
universe@235:         val days = http.param("days")?.toIntOrNull() ?: 30
universe@195: 
universe@239:         val issuesFromDb = dao.listIssueHistory(project.id, days)
universe@239:         val issueHistory = if (assignees == null) issuesFromDb else
universe@239:             issuesFromDb.filter { assignees.contains(it.data.assigneeUsername) }
universe@239: 
universe@235:         // TODO: add comment history depending on parameter
universe@235: 
universe@235:         http.view = IssueFeed(project, generateFeedEntries(issueHistory))
universe@198:         http.renderFeed("issues-feed")
universe@195:     }
universe@195: }