Created
December 6, 2020 16:07
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Asset Match (PHP - Laravel)
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| <? | |
| // Get all book asset records for given country and type (unlisted and bankrupted companies only) | |
| $allUnlistedAssets = BookAsset::join('companies AS c', 'company_id', '=', 'c.id') | |
| ->where('c.type', '=', 'unlisted') | |
| ->where('c.country', '=', 'COUNTRY_NAME_HERE') | |
| ->where('c.bankrupted', '=', 'yes') | |
| ->get(); | |
| // Sort them by their value's descending order | |
| $unlistedAssets = $allUnlistedAssets->sortByDesc('value', SORT_NUMERIC); | |
| // Get all book asset records for given country and type (listed companies only) | |
| $allListedAssetsGroupOne = BookAsset::join('companies AS c', 'company_id', '=', 'c.id') | |
| ->where('c.type', '=', 'listed') | |
| ->where('c.country', '=', 'COUNTRY_NAME_HERE') | |
| ->get(); | |
| // for each record (company) | |
| foreach ($unlistedAssets as $unlistedAsset) { | |
| // the year the company bankrupted | |
| $year = $unlistedAsset->company->when; | |
| // Create a list of book asset values | |
| // where the year matches the year company bankrupted | |
| // and assets belong to listed companies. | |
| // Also sort them by descending order | |
| $allListedAssetValues = $allListedAssetsGroupOne->where('year', $year)->filter(function ($asset) use ($year) { | |
| return $asset->company->bookAssets->where('year', $year)->count() === 1; | |
| })->sortByDesc('value', SORT_NUMERIC)->pluck('value')->toArray(); | |
| // get the current company's book asset record and | |
| // match with the closest asset from that list we generated above. | |
| $closestNumber = $this->getClosestNumber($unlistedAsset['value'], $allListedAssetValues); | |
| // find the company that has the matched value as their book asset (closest book asset record). | |
| $matchedListedCompany = BookAsset::where('value', $closestNumber)->where('year', $year)->first(); | |
| // self explanatory | |
| return [ | |
| 'listed_company_name' => $matchedListedCompany->company->name, | |
| 'unlisted_company_name' => $unlistedAsset->company->name, | |
| 'year' => $year, | |
| 'country' => $unlistedAsset->company->country, | |
| 'listed_company_market_cap' => (float) $matchedListedCompany->company->marketCapitalizations->where('year', $year)->sortByDesc('value', SORT_NUMERIC)->first()['value'], | |
| 'listed_company_standard_dev' => (float) $matchedListedCompany->company->standartDeviationSampleResults->where('year', $year)->first()['value'], | |
| 'unlisted_company_total_liability' => (float) $unlistedAsset->company->totalLiabilities->where('year', $year)->first()['value'], | |
| ]; | |
| } |
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