LightPIT: src/main/kotlin/de/uapcore/lightpit/servlet/FeedServlet.kt@819c5178b6fe

     1 /*

     2  * Copyright 2021 Mike Becker. All rights reserved.

     3  *

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

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

     6  *

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

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

     9  *

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

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

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

    13  *

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

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

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

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

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

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

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

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

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

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

    24  */

    26 package de.uapcore.lightpit.servlet

    28 import com.github.difflib.text.DiffRow

    29 import com.github.difflib.text.DiffRowGenerator

    30 import de.uapcore.lightpit.AbstractServlet

    31 import de.uapcore.lightpit.HttpRequest

    32 import de.uapcore.lightpit.dao.DataAccessObject

    33 import de.uapcore.lightpit.entities.IssueHistoryData

    34 import de.uapcore.lightpit.entities.IssueHistoryEntry

    35 import de.uapcore.lightpit.viewmodel.IssueDiff

    36 import de.uapcore.lightpit.viewmodel.IssueFeed

    37 import de.uapcore.lightpit.viewmodel.IssueFeedEntry

    38 import java.text.SimpleDateFormat

    39 import javax.servlet.annotation.WebServlet

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

    43 class FeedServlet : AbstractServlet() {

    45     init {

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

    47     }

    49     private fun fullContent(issue: IssueHistoryData) = IssueDiff(

    50         issue.id,

    51         issue.subject,

    52         issue.component,

    53         issue.status.name,

    54         issue.category.name,

    55         issue.subject,

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

    57         issue.assignee,

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

    59         issue.affected,

    60         issue.resolved

    61     )

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

    64         val generator = DiffRowGenerator.create()

    65             .showInlineDiffs(true)

    66             .mergeOriginalRevised(true)

    67             .inlineDiffByWord(true)

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

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

    70             .build()

    72         val prev = fullContent(next)

    73         val diff = fullContent(cur)

    75         val result = generator.generateDiffRows(

    76             listOf(prev.subject, prev.component, prev.status,

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

    78             listOf(diff.subject, diff.component, diff.status,

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

    80         )

    82         diff.subject = result[0].oldLine

    83         diff.component = result[1].oldLine

    84         diff.status = result[2].oldLine

    85         diff.category = result[3].oldLine

    86         diff.assignee = result[4].oldLine

    87         diff.eta = result[5].oldLine

    88         diff.affected = result[6].oldLine

    89         diff.resolved = result[7].oldLine

    91         diff.description = generator.generateDiffRows(

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

    93             diff.description.split('\n')

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

    96         return diff

    97     }

    99     /**

   100      * Generates the feed entries.

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

   102      */

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

   104         if (historyEntry.isEmpty()) emptyList()

   105         else historyEntry.zipWithNext().map { (cur, next) ->

   106             IssueFeedEntry(

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

   108             )

   109         }.plus(

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

   111         )

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

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

   115         if (project == null) {

   116             http.response.sendError(404)

   117             return

   118         }

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

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

   123         // TODO: add comment history depending on parameter

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

   126         http.renderFeed("issues-feed")

   127     }

   128 }

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