get random line for tagging

buscribe_data.sql

@@ -62,6 +62,13 @@ CREATE TABLE buscribe_line_speakers
     PRIMARY KEY (line, speaker, verifier)
 );
 
+CREATE TABLE buscribe_line_inferred_speakers
+(
+    line    BIGINT NOT NULL REFERENCES buscribe_transcriptions,
+    speaker BIGINT NOT NULL REFERENCES buscribe_speakers,
+    PRIMARY KEY (line, speaker)
+);
+
 CREATE TABLE buscribe_verified_lines
 (
 --     id            BIGSERIAL PRIMARY KEY,
@@ -107,12 +114,18 @@ SELECT id,
        start_time,
        end_time,
        null                                       AS verifier,
-       null                                       AS names,
+       names,
        transcription_line,
        to_tsvector('english', transcription_line) AS transcription_line_ts,
        null                                       AS names_ts,
        transcription_json
-FROM buscribe_transcriptions;
+FROM buscribe_transcriptions
+         LEFT OUTER JOIN (
+    SELECT line, array_agg(name) AS names
+    FROM buscribe_line_inferred_speakers
+             INNER JOIN buscribe_speakers ON buscribe_line_inferred_speakers.speaker = buscribe_speakers.id
+    GROUP BY line
+) AS speakers ON id = speakers.line;
 
 ROLLBACK;
 

professor-api/professor_api/professor_api.py

@@ -1,6 +1,7 @@
 import re
 import urllib.parse
 from functools import wraps
+from random import randrange
 
 import flask
 import gevent
@@ -63,7 +64,27 @@ def get_line(line_id):
     if line is None:
         return "Line not found.", 404
     else:
-        return {"start_time": line.start_time.isoformat(),
+        return {"id": line.id,
+                "start_time": line.start_time.isoformat(),
+                "end_time": line.end_time.isoformat(),
+                "line_data": line.transcription_json}
+
+
+@app.route('/professor/line/random', methods=["GET"])
+def get_random_line():
+    db_conn = app.db_manager.get_conn()
+
+    n_lines = database.query(db_conn, "SELECT count(*) AS n_lines FROM buscribe_transcriptions;").fetchone().n_lines
+
+    row = randrange(n_lines)
+
+    line = database.query(db_conn, "SELECT * FROM buscribe_transcriptions OFFSET %(row)s LIMIT 1;", row=row).fetchone()
+
+    if line is None:
+        return "Line not found.", 404
+    else:
+        return {"id": line.id,
+                "start_time": line.start_time.isoformat(),
                 "end_time": line.end_time.isoformat(),
                 "line_data": line.transcription_json}
 

professor/script.js

@@ -1,7 +1,13 @@
 function pageReady() {
 
     const params = new URLSearchParams(document.location.search.substring(1));
-    line_id = parseInt(params.get("line"), 10);
+    let line_id;
+    if (params.get("line") !== "random") {
+        line_id = parseInt(params.get("line"), 10);
+    } else {
+        line_id = "random"
+    }
+
 
     videojs("player", {
         // src: "test.m3u8",
@@ -74,7 +80,8 @@ function loggedIn(response) {
 }
 
 function fillLineInfo(line_json) {
-    // document.getElementById("original_transcription").innerText = line_json.line_data.text;
+    line_id = line_json.id
+
     line = line_json
     document.getElementById("original_transcription").innerHTML = line_json.line_data.result
         .map(word => `<span style="opacity: ${word.conf}">${word.word}</span>`).join(" ");