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Fix statistics calculation for imported Likert scale responses and support text rating answers

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This commit is contained in:
pongpon pitisuk
2026-09-12 16:11:27 +07:00
parent fb5b4b4c95
commit a68bddb5c0
4 changed files with 217 additions and 39 deletions
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api/export.php
+43 -5
View File
@@ -45,6 +45,41 @@ switch ($action) {
jsonResponse(['error' => 'Invalid action'], 400);
}
function parseRatingScore($str) {
$trimmed = trim((string)$str);
if ($trimmed === '') return null;
if (is_numeric($trimmed)) {
$num = (int)$trimmed;
return ($num >= 1 && $num <= 5) ? $num : null;
}
if (preg_match('/^([1-5])\s*[\.\:\-\(\s]/u', $trimmed, $m)) {
return (int)$m[1];
}
if (mb_strpos($trimmed, 'มากที่สุด') !== false || mb_strpos($trimmed, 'ดีมาก') !== false || mb_strpos($trimmed, 'ยอดเยี่ยม') !== false || mb_strpos($trimmed, 'ดีเยี่ยม') !== false || mb_strpos($trimmed, 'เห็นด้วยอย่างยิ่ง') !== false) {
return 5;
}
if (mb_strpos($trimmed, 'น้อยที่สุด') !== false || mb_strpos($trimmed, 'ไม่เห็นด้วยอย่างยิ่ง') !== false) {
return 1;
}
if (mb_strpos($trimmed, 'มาก') !== false || mb_strpos($trimmed, 'ดี') !== false || mb_strpos($trimmed, 'เห็นด้วย') !== false) {
return 4;
}
if (mb_strpos($trimmed, 'ปานกลาง') !== false || mb_strpos($trimmed, 'พอใช้') !== false || mb_strpos($trimmed, 'ไม่แน่ใจ') !== false) {
return 3;
}
if (mb_strpos($trimmed, 'น้อย') !== false || mb_strpos($trimmed, 'ควรปรับปรุง') !== false || mb_strpos($trimmed, 'ต้องปรับปรุง') !== false || mb_strpos($trimmed, 'ไม่เห็นด้วย') !== false) {
return 2;
}
if (mb_strpos($trimmed, 'ปรับปรุง') !== false) {
return 1;
}
return null;
}
function getStatsData($surveyId) {
$db = getDB();
@@ -78,7 +113,7 @@ function getStatsData($surveyId) {
$aStmt = $db->prepare("
SELECT answer_value, COUNT(*) as cnt
FROM response_answers
WHERE question_id = ? AND answer_value REGEXP '^[0-9]+$'
WHERE question_id = ? AND answer_value != ''
GROUP BY answer_value
");
$aStmt->execute([$q['id']]);
@@ -89,10 +124,13 @@ function getStatsData($surveyId) {
for ($i = 1; $i <= 5; $i++) $freq[$i] = 0;
foreach ($freqData as $fd) {
$val = (int)$fd['answer_value'];
$rawVal = trim($fd['answer_value']);
$cnt = (int)$fd['cnt'];
$val = parseRatingScore($rawVal);
if ($val >= 1 && $val <= 5) {
$freq[$val] = (int)$fd['cnt'];
for ($j = 0; $j < (int)$fd['cnt']; $j++) $values[] = $val;
$freq[$val] += $cnt;
for ($j = 0; $j < $cnt; $j++) $values[] = $val;
}
}
@@ -116,7 +154,7 @@ function getStatsData($surveyId) {
else $q['interpretation'] = 'น้อยที่สุด';
} elseif (in_array($q['question_type'], ['dropdown', 'checkbox', 'radio'])) {
$aStmt = $db->prepare("SELECT answer_value, COUNT(*) as cnt FROM response_answers WHERE question_id = ? GROUP BY answer_value ORDER BY cnt DESC");
$aStmt = $db->prepare("SELECT answer_value, COUNT(*) as cnt FROM response_answers WHERE question_id = ? AND answer_value != '' GROUP BY answer_value ORDER BY cnt DESC");
$aStmt->execute([$q['id']]);
$q['frequencies'] = $aStmt->fetchAll();
}
api/import_responses.php
+69 -8
View File
@@ -41,7 +41,7 @@ if (!$handle) {
jsonResponse(['error' => 'ไม่สามารถเปิดไฟล์ CSV ได้'], 500);
}
// Check UTF-8 BOM or UTF-16
// Check UTF-8 BOM
$bom = fread($handle, 3);
if ($bom !== "\xEF\xBB\xBF") {
rewind($handle);
@@ -61,7 +61,7 @@ $cleanHeaders = array_map(function($h) {
// Fetch all questions for this survey
$stmt = $db->prepare("
SELECT q.id, q.question_text, q.question_type
SELECT q.id, q.question_text, q.question_type, q.options
FROM survey_questions q
JOIN survey_sections s ON q.section_id = s.id
WHERE s.survey_id = ?
@@ -75,16 +75,57 @@ if (empty($questions)) {
jsonResponse(['error' => 'ไม่พบข้อคำถามในแบบสอบถามนี้'], 400);
}
// Map CSV Column Index -> question_id
$colToQuestionMap = [];
// Helper: normalize text for comparison
function normalizeText($str) {
$str = mb_strtolower($str, 'UTF-8');
// Remove leading numbers or prefix like "1. ", "ข้อ 1. "
$str = preg_replace('/^[\d๑-๙]+[\.\)\s\-:\x{00A0}]*/u', '', $str);
$str = preg_replace('/^[\d๑-๙\.]*[\.\)\s\-:\x{00A0}]*/u', '', $str);
return trim($str);
}
// Helper to parse Likert rating values from numbers or Thai text
function parseRatingScore($str) {
$trimmed = trim((string)$str);
if ($trimmed === '') return null;
if (is_numeric($trimmed)) {
$num = (int)$trimmed;
return ($num >= 1 && $num <= 5) ? $num : null;
}
if (preg_match('/^([1-5])\s*[\.\:\-\(\s]/u', $trimmed, $m)) {
return (int)$m[1];
}
if (mb_strpos($trimmed, 'มากที่สุด') !== false || mb_strpos($trimmed, 'ดีมาก') !== false || mb_strpos($trimmed, 'ยอดเยี่ยม') !== false || mb_strpos($trimmed, 'ดีเยี่ยม') !== false || mb_strpos($trimmed, 'เห็นด้วยอย่างยิ่ง') !== false) {
return 5;
}
if (mb_strpos($trimmed, 'น้อยที่สุด') !== false || mb_strpos($trimmed, 'ไม่เห็นด้วยอย่างยิ่ง') !== false) {
return 1;
}
if (mb_strpos($trimmed, 'มาก') !== false || mb_strpos($trimmed, 'ดี') !== false || mb_strpos($trimmed, 'เห็นด้วย') !== false) {
return 4;
}
if (mb_strpos($trimmed, 'ปานกลาง') !== false || mb_strpos($trimmed, 'พอใช้') !== false || mb_strpos($trimmed, 'ไม่แน่ใจ') !== false) {
return 3;
}
if (mb_strpos($trimmed, 'น้อย') !== false || mb_strpos($trimmed, 'ควรปรับปรุง') !== false || mb_strpos($trimmed, 'ต้องปรับปรุง') !== false || mb_strpos($trimmed, 'ไม่เห็นด้วย') !== false) {
return 2;
}
if (mb_strpos($trimmed, 'ปรับปรุง') !== false) {
return 1;
}
return null;
}
// Map CSV Column Index -> question_id
$colToQuestionMap = [];
$questionsById = [];
foreach ($questions as $q) {
$questionsById[$q['id']] = $q;
}
foreach ($cleanHeaders as $colIdx => $headerText) {
if (empty($headerText) || strtolower($headerText) === 'timestamp' || strtolower($headerText) === 'ประทับเวลา') {
continue;
@@ -92,11 +133,22 @@ foreach ($cleanHeaders as $colIdx => $headerText) {
$normHeader = normalizeText($headerText);
// Extract inside bracket if Google Forms grid header e.g. "Heading [Question]"
$bracketText = '';
if (preg_match('/\[(.*?)\]/', $headerText, $m)) {
$bracketText = normalizeText($m[1]);
}
// Try exact or normalized matching against survey questions
foreach ($questions as $q) {
$normQText = normalizeText($q['question_text']);
if ($normHeader === $normQText || strpos($normHeader, $normQText) !== false || strpos($normQText, $normHeader) !== false) {
if (
$normHeader === $normQText ||
($bracketText !== '' && ($bracketText === $normQText || strpos($bracketText, $normQText) !== false || strpos($normQText, $bracketText) !== false)) ||
strpos($normHeader, $normQText) !== false ||
strpos($normQText, $normHeader) !== false
) {
$colToQuestionMap[$colIdx] = $q['id'];
break;
}
@@ -104,7 +156,7 @@ foreach ($cleanHeaders as $colIdx => $headerText) {
}
// Fallback: If column mapping count is low, map columns sequentially to questions
if (count($colToQuestionMap) === 0) {
if (count($colToQuestionMap) < count($questions) / 2) {
$qIdx = 0;
foreach ($cleanHeaders as $colIdx => $headerText) {
if (strtolower($headerText) === 'timestamp' || strtolower($headerText) === 'ประทับเวลา') continue;
@@ -145,6 +197,15 @@ try {
foreach ($colToQuestionMap as $colIdx => $qId) {
$val = isset($row[$colIdx]) ? trim($row[$colIdx]) : '';
if ($val !== '') {
$targetQ = $questionsById[$qId] ?? null;
// Normalize rating score if it's a 5-point rating scale question
if ($targetQ && $targetQ['question_type'] === 'radio' && empty($targetQ['options'])) {
$score = parseRatingScore($val);
if ($score !== null) {
$val = (string)$score;
}
}
$stmtAns = $db->prepare("INSERT INTO response_answers (response_id, question_id, answer_value) VALUES (?, ?, ?)");
$stmtAns->execute([$responseId, $qId, $val]);
}
api/statistics.php
+76 -15
View File
@@ -28,6 +28,44 @@ if (!isAdmin()) {
}
}
/**
* Helper to parse Likert rating values from numbers or Thai text
*/
function parseRatingScore($str) {
$trimmed = trim((string)$str);
if ($trimmed === '') return null;
if (is_numeric($trimmed)) {
$num = (int)$trimmed;
return ($num >= 1 && $num <= 5) ? $num : null;
}
if (preg_match('/^([1-5])\s*[\.\:\-\(\s]/u', $trimmed, $m)) {
return (int)$m[1];
}
if (mb_strpos($trimmed, 'มากที่สุด') !== false || mb_strpos($trimmed, 'ดีมาก') !== false || mb_strpos($trimmed, 'ยอดเยี่ยม') !== false || mb_strpos($trimmed, 'ดีเยี่ยม') !== false || mb_strpos($trimmed, 'เห็นด้วยอย่างยิ่ง') !== false) {
return 5;
}
if (mb_strpos($trimmed, 'น้อยที่สุด') !== false || mb_strpos($trimmed, 'ไม่เห็นด้วยอย่างยิ่ง') !== false) {
return 1;
}
if (mb_strpos($trimmed, 'มาก') !== false || mb_strpos($trimmed, 'ดี') !== false || mb_strpos($trimmed, 'เห็นด้วย') !== false) {
return 4;
}
if (mb_strpos($trimmed, 'ปานกลาง') !== false || mb_strpos($trimmed, 'พอใช้') !== false || mb_strpos($trimmed, 'ไม่แน่ใจ') !== false) {
return 3;
}
if (mb_strpos($trimmed, 'น้อย') !== false || mb_strpos($trimmed, 'ควรปรับปรุง') !== false || mb_strpos($trimmed, 'ต้องปรับปรุง') !== false || mb_strpos($trimmed, 'ไม่เห็นด้วย') !== false) {
return 2;
}
if (mb_strpos($trimmed, 'ปรับปรุง') !== false) {
return 1;
}
return null;
}
switch ($action) {
case 'summary':
getSummary($surveyId);
@@ -52,24 +90,44 @@ function getSummary($surveyId) {
$stmt->execute([$surveyId]);
$surveyInfo = $stmt->fetch();
// Get overall mean and SD for radio/rating questions
// Fetch all answers for rating questions in this survey and compute mean/sd
$stmt = $db->prepare("
SELECT
AVG(CAST(ra.answer_value AS DECIMAL(10,2))) as overall_mean,
STDDEV(CAST(ra.answer_value AS DECIMAL(10,2))) as overall_sd
SELECT ra.answer_value
FROM response_answers ra
JOIN survey_questions sq ON ra.question_id = sq.id
JOIN survey_sections ss ON sq.section_id = ss.id
WHERE ss.survey_id = ? AND sq.question_type = 'radio' AND sq.options IS NULL AND ra.answer_value REGEXP '^[0-9]+$'
WHERE ss.survey_id = ? AND sq.question_type = 'radio' AND sq.options IS NULL
");
$stmt->execute([$surveyId]);
$overall = $stmt->fetch();
$rows = $stmt->fetchAll(PDO::FETCH_COLUMN);
$scores = [];
foreach ($rows as $ans) {
$sc = parseRatingScore($ans);
if ($sc !== null) {
$scores[] = $sc;
}
}
$overallMean = 0;
$overallSd = 0;
if (count($scores) > 0) {
$overallMean = array_sum($scores) / count($scores);
if (count($scores) > 1) {
$sumSq = 0;
foreach ($scores as $s) {
$sumSq += pow($s - $overallMean, 2);
}
$overallSd = sqrt($sumSq / (count($scores) - 1));
}
}
jsonResponse([
'survey' => $surveyInfo,
'total_responses' => (int)$total,
'overall_mean' => $overall['overall_mean'] ? round((float)$overall['overall_mean'], 2) : 0,
'overall_sd' => $overall['overall_sd'] ? round((float)$overall['overall_sd'], 2) : 0
'overall_mean' => round($overallMean, 2),
'overall_sd' => round($overallSd, 2)
]);
}
@@ -114,11 +172,11 @@ function getDetail($surveyId) {
];
if ($q['question_type'] === 'radio' && empty($q['options'])) {
// Calculate mean, SD, frequency for rating questions (1-5)
// Rating scale question (1-5)
$aStmt = $db->prepare("
SELECT answer_value, COUNT(*) as cnt
FROM response_answers
WHERE question_id = ? AND answer_value REGEXP '^[0-9]+$'
WHERE question_id = ? AND answer_value != ''
GROUP BY answer_value
ORDER BY answer_value
");
@@ -134,11 +192,14 @@ function getDetail($surveyId) {
}
foreach ($freqData as $fd) {
$val = (int)$fd['answer_value'];
$rawVal = trim($fd['answer_value']);
$cnt = (int)$fd['cnt'];
$val = parseRatingScore($rawVal);
if ($val >= 1 && $val <= 5) {
$frequencies[$val]['count'] = (int)$fd['cnt'];
$totalAnswers += (int)$fd['cnt'];
for ($j = 0; $j < (int)$fd['cnt']; $j++) {
$frequencies[$val]['count'] += $cnt;
$totalAnswers += $cnt;
for ($j = 0; $j < $cnt; $j++) {
$values[] = $val;
}
}
@@ -193,7 +254,7 @@ function getDetail($surveyId) {
$aStmt = $db->prepare("
SELECT answer_value, COUNT(*) as cnt
FROM response_answers
WHERE question_id = ?
WHERE question_id = ? AND answer_value != ''
GROUP BY answer_value
ORDER BY cnt DESC
");