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package ibd
import (
"context"
"fmt"
"net/http"
"net/url"
"strconv"
"strings"
"ibd-trader/internal/database"
"ibd-trader/internal/utils"
"github.com/Rhymond/go-money"
"golang.org/x/net/html"
)
func (c *Client) StockInfo(ctx context.Context, uri string) (*database.StockInfo, error) {
req, err := http.NewRequestWithContext(ctx, http.MethodGet, uri, nil)
if err != nil {
return nil, err
}
_, cookie, err := c.getCookie(ctx, nil)
if err != nil {
return nil, err
}
req.AddCookie(cookie)
// Set required query parameters
params := url.Values{}
params.Set("list", "ibd50")
params.Set("type", "weekly")
req.URL.RawQuery = params.Encode()
resp, err := c.Do(req)
if err != nil {
return nil, err
}
if resp.Result.StatusCode != http.StatusOK {
return nil, fmt.Errorf(
"unexpected status code %d: %s",
resp.Result.StatusCode,
resp.Result.Content,
)
}
node, err := html.Parse(strings.NewReader(resp.Result.Content))
if err != nil {
return nil, err
}
name, symbol, err := extractNameAndSymbol(node)
if err != nil {
return nil, fmt.Errorf("failed to extract name and symbol: %w", err)
}
chartAnalysis, err := extractChartAnalysis(node)
if err != nil {
return nil, fmt.Errorf("failed to extract chart analysis: %w", err)
}
ratings, err := extractRatings(node)
if err != nil {
return nil, fmt.Errorf("failed to extract ratings: %w", err)
}
price, err := extractPrice(node)
if err != nil {
return nil, fmt.Errorf("failed to extract price: %w", err)
}
return &database.StockInfo{
Symbol: symbol,
Name: name,
ChartAnalysis: chartAnalysis,
Ratings: ratings,
Price: price,
}, nil
}
func extractNameAndSymbol(node *html.Node) (name string, symbol string, err error) {
// Find span with ID "quote-symbol"
quoteSymbolNode := findId(node, "quote-symbol")
if quoteSymbolNode == nil {
return "", "", fmt.Errorf("could not find `quote-symbol` span")
}
// Get the text of the quote-symbol span
name = strings.TrimSpace(extractText(quoteSymbolNode))
// Find span with ID "qteSymb"
qteSymbNode := findId(node, "qteSymb")
if qteSymbNode == nil {
return "", "", fmt.Errorf("could not find `qteSymb` span")
}
// Get the text of the qteSymb span
symbol = strings.TrimSpace(extractText(qteSymbNode))
// Get index of last closing parenthesis
lastParenIndex := strings.LastIndex(name, ")")
if lastParenIndex == -1 {
return
}
// Find the last opening parenthesis before the closing parenthesis
lastOpenParenIndex := strings.LastIndex(name[:lastParenIndex], "(")
if lastOpenParenIndex == -1 {
return
}
// Remove the parenthesis pair
name = strings.TrimSpace(name[:lastOpenParenIndex] + name[lastParenIndex+1:])
return
}
func extractPrice(node *html.Node) (*money.Money, error) {
// Find the div with the ID "lstPrice"
lstPriceNode := findId(node, "lstPrice")
if lstPriceNode == nil {
return nil, fmt.Errorf("could not find `lstPrice` div")
}
// Get the text of the lstPrice div
priceStr := strings.TrimSpace(extractText(lstPriceNode))
// Parse the price
price, err := utils.ParseMoney(priceStr)
if err != nil {
return nil, fmt.Errorf("failed to parse price: %w", err)
}
return price, nil
}
func extractRatings(node *html.Node) (ratings database.Ratings, err error) {
// Find the div with class "smartContent"
smartSelectNode := findClass(node, "smartContent")
if smartSelectNode == nil {
return ratings, fmt.Errorf("could not find `smartContent` div")
}
// Iterate over children, looking for "smartRating" divs
for c := smartSelectNode.FirstChild; c != nil; c = c.NextSibling {
if !isClass(c, "smartRating") {
continue
}
err = processSmartRating(c, &ratings)
if err != nil {
return
}
}
return
}
// processSmartRating extracts the rating from a "smartRating" div and updates the ratings struct.
//
// The node should look like this:
//
// <ul class="smartRating">
// <li><a><span>Composite Rating</span></a></li>
// <li>94</li>
// ...
// </ul>
func processSmartRating(node *html.Node, ratings *database.Ratings) error {
// Check that the node is a ul
if node.Type != html.ElementNode || node.Data != "ul" {
return fmt.Errorf("expected ul node, got %s", node.Data)
}
// Get all `li` children
children := findChildren(node, func(node *html.Node) bool {
return node.Type == html.ElementNode && node.Data == "li"
})
// Extract the rating name
ratingName := strings.TrimSpace(extractText(children[0]))
// Extract the rating value
ratingValueStr := strings.TrimSpace(extractText(children[1]))
switch ratingName {
case "Composite Rating":
ratingValue, err := strconv.ParseUint(ratingValueStr, 10, 8)
if err != nil {
return fmt.Errorf("failed to parse Composite Rating: %w", err)
}
ratings.Composite = uint8(ratingValue)
case "EPS Rating":
ratingValue, err := strconv.ParseUint(ratingValueStr, 10, 8)
if err != nil {
return fmt.Errorf("failed to parse EPS Rating: %w", err)
}
ratings.EPS = uint8(ratingValue)
case "RS Rating":
ratingValue, err := strconv.ParseUint(ratingValueStr, 10, 8)
if err != nil {
return fmt.Errorf("failed to parse RS Rating: %w", err)
}
ratings.RelStr = uint8(ratingValue)
case "Group RS Rating":
ratingValue, err := database.LetterRatingFromString(ratingValueStr)
if err != nil {
return fmt.Errorf("failed to parse Group RS Rating: %w", err)
}
ratings.GroupRelStr = ratingValue
case "SMR Rating":
ratingValue, err := database.LetterRatingFromString(ratingValueStr)
if err != nil {
return fmt.Errorf("failed to parse SMR Rating: %w", err)
}
ratings.SMR = ratingValue
case "Acc/Dis Rating":
ratingValue, err := database.LetterRatingFromString(ratingValueStr)
if err != nil {
return fmt.Errorf("failed to parse Acc/Dis Rating: %w", err)
}
ratings.AccDis = ratingValue
default:
return fmt.Errorf("unknown rating name: %s", ratingName)
}
return nil
}
func extractChartAnalysis(node *html.Node) (string, error) {
// Find the div with class "chartAnalysis"
chartAnalysisNode := findClass(node, "chartAnalysis")
if chartAnalysisNode == nil {
return "", fmt.Errorf("could not find `chartAnalysis` div")
}
// Get the text of the chart analysis div
chartAnalysis := strings.TrimSpace(extractText(chartAnalysisNode))
return chartAnalysis, nil
}
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