186 lines
7.8 KiB
Zig
186 lines
7.8 KiB
Zig
const std = @import("std");
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const zfin = @import("../root.zig");
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const cli = @import("common.zig");
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const fmt = cli.fmt;
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/// Quote data extracted from the real-time API (or synthesized from candles).
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pub const QuoteData = struct {
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price: f64,
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open: f64,
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high: f64,
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low: f64,
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volume: u64,
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prev_close: f64,
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date: zfin.Date,
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};
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pub fn run(allocator: std.mem.Allocator, svc: *zfin.DataService, symbol: []const u8, color: bool, out: *std.Io.Writer) !void {
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// Fetch candle data for chart and history
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const candle_result = svc.getCandles(symbol) catch |err| switch (err) {
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zfin.DataError.NoApiKey => {
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try cli.stderrPrint("Error: TWELVEDATA_API_KEY not set.\n");
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return;
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},
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else => {
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try cli.stderrPrint("Error fetching candle data.\n");
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return;
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},
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};
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defer allocator.free(candle_result.data);
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const candles = candle_result.data;
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// Fetch real-time quote via DataService
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var quote: ?QuoteData = null;
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if (svc.getQuote(symbol)) |q| {
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quote = .{
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.price = q.close,
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.open = q.open,
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.high = q.high,
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.low = q.low,
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.volume = q.volume,
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.prev_close = q.previous_close,
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.date = if (candles.len > 0) candles[candles.len - 1].date else fmt.todayDate(),
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};
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} else |_| {}
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try display(allocator, candles, quote, symbol, color, out);
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}
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pub fn display(allocator: std.mem.Allocator, candles: []const zfin.Candle, quote: ?QuoteData, symbol: []const u8, color: bool, out: *std.Io.Writer) !void {
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const has_quote = quote != null;
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// Header
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try cli.setBold(out, color);
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if (quote) |q| {
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var price_buf: [24]u8 = undefined;
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try out.print("\n{s} {s}\n", .{ symbol, fmt.fmtMoney(&price_buf, q.price) });
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} else if (candles.len > 0) {
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var price_buf: [24]u8 = undefined;
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try out.print("\n{s} {s} (close)\n", .{ symbol, fmt.fmtMoney(&price_buf, candles[candles.len - 1].close) });
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} else {
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try out.print("\n{s}\n", .{symbol});
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}
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try cli.reset(out, color);
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try out.print("========================================\n", .{});
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// Quote details
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const price = if (quote) |q| q.price else if (candles.len > 0) candles[candles.len - 1].close else @as(f64, 0);
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const prev_close = if (quote) |q| q.prev_close else if (candles.len >= 2) candles[candles.len - 2].close else @as(f64, 0);
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if (candles.len > 0 or has_quote) {
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const latest_date = if (quote) |q| q.date else if (candles.len > 0) candles[candles.len - 1].date else fmt.todayDate();
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const open_val = if (quote) |q| q.open else if (candles.len > 0) candles[candles.len - 1].open else @as(f64, 0);
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const high_val = if (quote) |q| q.high else if (candles.len > 0) candles[candles.len - 1].high else @as(f64, 0);
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const low_val = if (quote) |q| q.low else if (candles.len > 0) candles[candles.len - 1].low else @as(f64, 0);
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const vol_val = if (quote) |q| q.volume else if (candles.len > 0) candles[candles.len - 1].volume else @as(u64, 0);
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var date_buf: [10]u8 = undefined;
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var vol_buf: [32]u8 = undefined;
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try out.print(" Date: {s}\n", .{latest_date.format(&date_buf)});
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try out.print(" Open: ${d:.2}\n", .{open_val});
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try out.print(" High: ${d:.2}\n", .{high_val});
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try out.print(" Low: ${d:.2}\n", .{low_val});
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try out.print(" Volume: {s}\n", .{fmt.fmtIntCommas(&vol_buf, vol_val)});
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if (prev_close > 0) {
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const change = price - prev_close;
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const pct = (change / prev_close) * 100.0;
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var chg_buf: [64]u8 = undefined;
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try cli.setGainLoss(out, color, change);
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try out.print(" Change: {s}\n", .{fmt.fmtPriceChange(&chg_buf, change, pct)});
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try cli.reset(out, color);
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}
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}
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// Braille chart (60 columns, 10 rows)
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if (candles.len >= 2) {
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try out.print("\n", .{});
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const chart_days: usize = @min(candles.len, 60);
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const chart_data = candles[candles.len - chart_days ..];
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var chart = fmt.computeBrailleChart(allocator, chart_data, 60, 10, cli.CLR_POSITIVE, cli.CLR_NEGATIVE) catch null;
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if (chart) |*ch| {
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defer ch.deinit(allocator);
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try fmt.writeBrailleAnsi(out, ch, color, cli.CLR_MUTED);
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}
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}
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// Recent history table (last 20 candles)
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if (candles.len > 0) {
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try out.print("\n", .{});
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try cli.setBold(out, color);
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try out.print(" Recent History:\n", .{});
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try cli.reset(out, color);
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try cli.setFg(out, color, cli.CLR_MUTED);
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try out.print(" {s:>12} {s:>10} {s:>10} {s:>10} {s:>10} {s:>12}\n", .{
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"Date", "Open", "High", "Low", "Close", "Volume",
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});
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try cli.reset(out, color);
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const start_idx = if (candles.len > 20) candles.len - 20 else 0;
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for (candles[start_idx..]) |candle| {
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var row_buf: [128]u8 = undefined;
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const day_gain = candle.close >= candle.open;
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try cli.setGainLoss(out, color, if (day_gain) @as(f64, 1) else @as(f64, -1));
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try out.print("{s}\n", .{fmt.fmtCandleRow(&row_buf, candle)});
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try cli.reset(out, color);
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}
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try out.print("\n {d} trading days shown\n", .{candles[start_idx..].len});
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}
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try out.print("\n", .{});
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}
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// ── Tests ────────────────────────────────────────────────────
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test "display with candles only" {
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var buf: [8192]u8 = undefined;
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var w: std.Io.Writer = .fixed(&buf);
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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defer _ = gpa.deinit();
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const candles = [_]zfin.Candle{
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.{ .date = .{ .days = 20000 }, .open = 150.0, .high = 155.0, .low = 149.0, .close = 153.0, .adj_close = 153.0, .volume = 50_000_000 },
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.{ .date = .{ .days = 20001 }, .open = 153.0, .high = 158.0, .low = 152.0, .close = 156.0, .adj_close = 156.0, .volume = 45_000_000 },
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};
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try display(gpa.allocator(), &candles, null, "AAPL", false, &w);
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const out = w.buffered();
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try std.testing.expect(std.mem.indexOf(u8, out, "AAPL") != null);
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try std.testing.expect(std.mem.indexOf(u8, out, "(close)") != null);
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try std.testing.expect(std.mem.indexOf(u8, out, "Recent History") != null);
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try std.testing.expect(std.mem.indexOf(u8, out, "2 trading days shown") != null);
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}
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test "display with quote data" {
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var buf: [8192]u8 = undefined;
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var w: std.Io.Writer = .fixed(&buf);
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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defer _ = gpa.deinit();
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const candles = [_]zfin.Candle{};
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const quote: QuoteData = .{
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.price = 175.50,
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.open = 174.00,
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.high = 176.00,
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.low = 173.50,
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.volume = 60_000_000,
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.prev_close = 172.00,
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.date = .{ .days = 20001 },
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};
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try display(gpa.allocator(), &candles, quote, "AAPL", false, &w);
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const out = w.buffered();
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try std.testing.expect(std.mem.indexOf(u8, out, "AAPL") != null);
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try std.testing.expect(std.mem.indexOf(u8, out, "Change") != null);
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// Should NOT have "(close)" since we have a real quote
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try std.testing.expect(std.mem.indexOf(u8, out, "(close)") == null);
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}
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test "display no ANSI without color" {
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var buf: [8192]u8 = undefined;
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var w: std.Io.Writer = .fixed(&buf);
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var gpa = std.heap.GeneralPurposeAllocator(.{}){};
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defer _ = gpa.deinit();
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const candles = [_]zfin.Candle{
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.{ .date = .{ .days = 20000 }, .open = 100.0, .high = 105.0, .low = 99.0, .close = 103.0, .adj_close = 103.0, .volume = 1_000_000 },
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};
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try display(gpa.allocator(), &candles, null, "SPY", false, &w);
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const out = w.buffered();
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try std.testing.expect(std.mem.indexOf(u8, out, "\x1b[") == null);
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}
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