93 lines
2.4 KiB
Go
93 lines
2.4 KiB
Go
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package staticjsonYahooFinance
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import (
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"os"
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)
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type security struct {
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Symbol string `json:"symbol"`
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Quantity int `json:"quantity"`
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}
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type account struct {
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YnabAccountID string `json:"ynabAccountId"`
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Securities []security `json:"securities"`
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}
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type inputData struct {
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Accounts []account `json:"accounts"`
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}
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type Provider struct {
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data *inputData // Data stored on disk and loaded when program starts
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client *client // HTTP client for interacting with Finnhub API
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}
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func (p *Provider) Name() string {
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return "Static JSON - Yahoo Finance"
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}
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// Configures the provider for usage via environment variables and inputData
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// If an error is returned, the provider will not be used
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func (p *Provider) Configure() error {
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var err error
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// Load input data from disk
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p.data, err = loadInputData()
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if err != nil {
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return err
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}
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p.client, err = newClient()
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if err != nil {
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return fmt.Errorf("failed to create new client: %v", err)
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}
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return nil
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}
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// Returns slices of account balances and mapped YNAB account IDs, along with an error
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func (p *Provider) GetBalances() ([]int, []string, error) {
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balances := make([]int, 0)
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ynabAccountIDs := make([]string, 0)
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for i := range p.data.Accounts {
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balance := 0
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for j := range p.data.Accounts[i].Securities {
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price, err := p.client.getChart(p.data.Accounts[i].Securities[j].Symbol)
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if err != nil {
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return balances, ynabAccountIDs, fmt.Errorf("failed to get quote for security with symbol '%s': %v", p.data.Accounts[i].Securities[j].Symbol, err)
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}
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balance += price * p.data.Accounts[i].Securities[j].Quantity
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}
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balances = append(balances, balance)
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ynabAccountIDs = append(ynabAccountIDs, p.data.Accounts[i].YnabAccountID)
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}
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return balances, ynabAccountIDs, nil
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}
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// Load input data from disk
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func loadInputData() (*inputData, error) {
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data := &inputData{}
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f, err := os.Open("data/staticjsonYahooFinance-data.json")
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if errors.Is(err, os.ErrNotExist) {
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return nil, fmt.Errorf("this account provider is not configured: missing data/staticjsonYahooFinance-data.json")
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}
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defer f.Close()
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b, err := io.ReadAll(f)
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if err != nil {
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return nil, fmt.Errorf("failed to read file data/staticjsonYahooFinance-data.json: %v", err)
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}
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err = json.Unmarshal(b, data)
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if err != nil {
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return nil, fmt.Errorf("failed to unmarshal data/staticjsonYahooFinance-data.json to inputData struct: %v", err)
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}
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return data, nil
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}
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