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OPD medicine: fuzzy duplicate detection for dosage variants (8MG/8 MG/8)

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This commit is contained in:
DevSoftTech Server 2026-04-01 17:52:49 +05:30
parent 7ea22378f5
commit 7df04b9ff2
1 changed files with 47 additions and 4 deletions
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51
app/Models/OpdMedicineModel.php
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@ -22,8 +22,51 @@ class OpdMedicineModel
public function normalizeMedicineName(string $name): string
{
$name = trim($name);
// Collapse all whitespace to single space
$name = preg_replace('/\s+/', ' ', $name) ?? $name;
return mb_strtolower($name);
$name = mb_strtolower($name);
// Remove space between number and dosage unit: "8 mg" → "8mg", "10 mcg" → "10mcg"
// Covers: mg, mcg, iu, ml, g, kg, mmol, meq, units, tab, cap, drops, inj, puff
$name = preg_replace(
'/(\d)\s*(mcg|mmol|meq|units|drops|puffs|inj|tab|cap|ml|mg|iu|kg|g)\b/i',
'$1$2',
$name
) ?? $name;
// Strip trailing dosage unit+number suffixes and all-trailing units
// e.g. "zerodol th max 8mg" → "zerodol th max 8mg" → kept as-is but normalized
// Collapse any double-spaces introduced
$name = preg_replace('/\s{2,}/', ' ', $name) ?? $name;
return trim($name);
}
/**
* Compute a fuzzy key used for duplicate grouping.
* Removes all dosage numbers and units so that "8mg", "8 mg", "8" all produce
* the same key for the same base name.
*/
public function normalizeMedicineNameFuzzy(string $name): string
{
$name = $this->normalizeMedicineName($name);
// Remove standalone numbers and dosage unit combos (e.g. "8mg", "10 mcg", "500")
$name = preg_replace(
'/\b\d+\.?\d*\s*(mcg|mmol|meq|units|drops|puffs|inj|tab|cap|ml|mg|iu|kg|g)?\b/i',
' ',
$name
) ?? $name;
// Remove punctuation
$name = preg_replace('/[\/\-\(\)\[\]\.]+/', ' ', $name) ?? $name;
$name = preg_replace('/\s{2,}/', ' ', $name) ?? $name;
return trim($name);
}
public function findDuplicateByName(string $itemName, int $excludeId = 0): ?array
@ -38,7 +81,7 @@ class OpdMedicineModel
->get()
->getResultArray();
$needle = $this->normalizeMedicineName($itemName);
$needle = $this->normalizeMedicineNameFuzzy($itemName);
if ($needle === '') {
return null;
}
@ -49,7 +92,7 @@ class OpdMedicineModel
continue;
}
$current = $this->normalizeMedicineName((string) ($row['item_name'] ?? ''));
$current = $this->normalizeMedicineNameFuzzy((string) ($row['item_name'] ?? ''));
if ($current !== '' && $current === $needle) {
return $row;
}
@ -72,7 +115,7 @@ class OpdMedicineModel
$groups = [];
foreach ($rows as $row) {
$norm = $this->normalizeMedicineName((string) ($row['item_name'] ?? ''));
$norm = $this->normalizeMedicineNameFuzzy((string) ($row['item_name'] ?? ''));
if ($norm === '') {
continue;
}