From edb91b7b723cd7edf2a42e9126099e561efd41fd Mon Sep 17 00:00:00 2001
From: s5260822 <s5260822@stud.uni-frankfurt.de>
Date: Sat, 22 Mar 2025 22:48:14 +0100
Subject: [PATCH] added export for list of speeches

---
 .../project/gruppe_05_1/export/TeXUtil.java   | 15 ++++++
 .../project/gruppe_05_1/rest/RESTHandler.java |  1 +
 .../rest/SpeechesExportController.java        | 52 +++++++++++++++++++
 3 files changed, 68 insertions(+)

diff --git a/src/main/java/org/texttechnologylab/project/gruppe_05_1/export/TeXUtil.java b/src/main/java/org/texttechnologylab/project/gruppe_05_1/export/TeXUtil.java
index 3e4318b..c02aa14 100644
--- a/src/main/java/org/texttechnologylab/project/gruppe_05_1/export/TeXUtil.java
+++ b/src/main/java/org/texttechnologylab/project/gruppe_05_1/export/TeXUtil.java
@@ -122,6 +122,21 @@ public class TeXUtil {
         return convertTexToBase64PDF(tex.toString());
     }
 
+    public static String getBulkExportedSpeechesBase64String(List<String> speechIds) throws IOException, InterruptedException {
+        StringBuilder tex = new StringBuilder();
+
+        tex.append(PREAMBLE.replace("$$EXPORTCATEGORY$$", "selected speeches"));
+        tex.append(BEGIN_DOCUMENT);
+        tex.append(TABLEOFCONTENTS);
+        for (String speechId : speechIds) {
+            tex.append(getSpeechToTexComponent(speechId));
+            tex.append(NEWPAGE);
+        }
+        tex.append(END_DOCUMENT);
+
+        return convertTexToBase64PDF(tex.toString());
+    }
+
     public static String convertTexToBase64PDF(String tex) throws IOException, InterruptedException {
         // Create a temporary directory
         File tempDir = new File(TEMP_EXPORT_DIR);
diff --git a/src/main/java/org/texttechnologylab/project/gruppe_05_1/rest/RESTHandler.java b/src/main/java/org/texttechnologylab/project/gruppe_05_1/rest/RESTHandler.java
index f30d669..7db4d8d 100644
--- a/src/main/java/org/texttechnologylab/project/gruppe_05_1/rest/RESTHandler.java
+++ b/src/main/java/org/texttechnologylab/project/gruppe_05_1/rest/RESTHandler.java
@@ -70,5 +70,6 @@ public class RESTHandler {
         app.get("/export/speaker/{id}", SpeechesExportController::exportSpeechesFromSpeaker);      // exportiere alle Reden eines Parlamentariers als PDF
         app.get("/export/topic/{topic}", SpeechesExportController::exportSpeechesWithTopic);      // exportiere alle Reden zu einem Thema als PDF
         app.get("/export/all", SpeechesExportController::exportAllSpeeches);      // exportiere alle Reden als PDF CAUTION!!!: This will take forever but is required in the exercise
+        app.get("/export/speeches/{speechIds}", SpeechesExportController::exportSpeeches);      // exportiere eine Liste von Reden als PDF
     }
 }
diff --git a/src/main/java/org/texttechnologylab/project/gruppe_05_1/rest/SpeechesExportController.java b/src/main/java/org/texttechnologylab/project/gruppe_05_1/rest/SpeechesExportController.java
index 2930fc7..d053b38 100644
--- a/src/main/java/org/texttechnologylab/project/gruppe_05_1/rest/SpeechesExportController.java
+++ b/src/main/java/org/texttechnologylab/project/gruppe_05_1/rest/SpeechesExportController.java
@@ -10,6 +10,7 @@ import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.util.Arrays;
 import java.util.Base64;
+import java.util.List;
 
 import static org.texttechnologylab.project.gruppe_05_1.export.TeXUtil.*;
 
@@ -188,4 +189,55 @@ public class SpeechesExportController {
             Logger.debug(Arrays.toString(e.getStackTrace()));
         }
     }
+
+    @OpenApi(
+            summary = "Get speeches by IDs as a PDF",
+            description = "Returns a LaTeX-generated PDF of the speeches specified by their IDs",
+            operationId = "getSpeechesByIds",
+            path = "/export/speeches/{speechIds}",  // Comma-separated IDs
+            methods = HttpMethod.GET,
+            tags = {"Export", "Speeches", "PDF"},
+            responses = {
+                    @OpenApiResponse(status = "200")
+            })
+    public static void exportSpeeches(Context ctx) {
+        byte[] pdfBytes = new byte[0];
+
+        try {
+            // Extract speech IDs from the path
+            String speechIdsParam = ctx.pathParam("speechIds");
+            List<String> speechIds = Arrays.asList(speechIdsParam.split(","));
+
+            // Generate PDF for given speech IDs
+            pdfBytes = Base64.getDecoder().decode(getBulkExportedSpeechesBase64String(speechIds));
+        } catch (Exception e) {
+            Logger.error("Failed to generate export for speeches: " + ctx.pathParam("speechIds"));
+            Logger.error(e.getMessage());
+            Logger.debug(Arrays.toString(e.getStackTrace()));
+        }
+
+        // Set response content type
+        ctx.contentType("application/pdf");
+
+        ByteArrayInputStream stream = new ByteArrayInputStream(pdfBytes);
+        if (stream.available() == 0) {
+            Logger.error("PDF stream is empty.");
+            ctx.result("Internal Server Error");
+            ctx.status(500);
+            return;
+        }
+
+        // Send the PDF as response
+        ctx.result(stream);
+
+        try {
+            // Clean up temporary files
+            deleteTeXTempDirContents();
+            Logger.debug("Temporary folder deleted.");
+        } catch (IOException e) {
+            Logger.error("Failed to delete temporary folder.");
+            Logger.error(e.getMessage());
+            Logger.debug(Arrays.toString(e.getStackTrace()));
+        }
+    }
 }