add prompt dir

digits-work-sample-go.d/transaction.go

@@ -0,0 +1,61 @@
+package analyzer
+
+import (
+	"encoding/json"
+	"errors"
+	"os"
+)
+
+// Transaction represents a transaction from our upstream source.
+// URL: https://catalog.data.gov/dataset/purchase-card-pcard-fiscal-year-2014
+type Transaction struct {
+	Category               string `json:"MerchantCategory"`
+	Vendor                 string
+	Description            string
+	AgencyName             string
+	CardholderLastName     string
+	TransactionDate        string
+	Amount                 Amount `json:",string"`
+	YearMonth              string
+	CardholderFirstInitial string
+	AgencyNumber           string
+	PostedDate             string
+}
+
+func (trn Transaction) String() string {
+	// TODO: Not implemented.
+	return ""
+}
+
+// Transactions represents a list of Transaction
+type Transactions []Transaction
+
+// Sum adds all transactions together.
+func (trns Transactions) Sum() Amount {
+	// TODO: Not implemented.
+	return 0.0
+}
+
+// Count is the number of unique Transactions.
+func (trns Transactions) Count() int {
+	return len(trns)
+}
+
+func TransactionsFromFile(path string) (Transactions, error) {
+	jsonFile, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer jsonFile.Close()
+
+	var transactions Transactions
+	if err := json.NewDecoder(jsonFile).Decode(&transactions); err != nil {
+		return nil, err
+	}
+
+	return transactions, nil
+}
+
+func TransactionsFromURLs(url ...string) (Transactions, error) {
+	return nil, errors.New("not implemented")
+}