From 52337ab5a9e3a59275044b32cc7dcf31f44f0411 Mon Sep 17 00:00:00 2001
From: Emil Lerch <emil@lerch.org>
Date: Tue, 3 Mar 2026 12:27:23 -0800
Subject: [PATCH] title case sector in enrich command

---
 src/commands/enrich.zig |  8 ++++++--
 src/format.zig          | 28 ++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+), 2 deletions(-)

diff --git a/src/commands/enrich.zig b/src/commands/enrich.zig
index 530fa82..d71d7aa 100644
--- a/src/commands/enrich.zig
+++ b/src/commands/enrich.zig
@@ -55,7 +55,9 @@ fn enrichSymbol(allocator: std.mem.Allocator, av_key: []const u8, sym: []const u
         if (overview.asset_type) |at| allocator.free(at);
     }
 
-    const sector_str = overview.sector orelse "Unknown";
+    const sector_raw = overview.sector orelse "Unknown";
+    var sector_buf: [64]u8 = undefined;
+    const sector_str = cli.fmt.toTitleCase(&sector_buf, sector_raw);
     const country_str = overview.country orelse "US";
     const geo_str = if (std.mem.eql(u8, country_str, "USA")) "US" else country_str;
 
@@ -166,7 +168,9 @@ fn enrichPortfolio(allocator: std.mem.Allocator, av_key: []const u8, file_path:
             if (overview.asset_type) |at| allocator.free(at);
         }
 
-        const sector_str = overview.sector orelse "Unknown";
+        const sector_raw = overview.sector orelse "Unknown";
+        var sector_buf: [64]u8 = undefined;
+        const sector_str = cli.fmt.toTitleCase(&sector_buf, sector_raw);
         const country_str = overview.country orelse "US";
         const geo_str = if (std.mem.eql(u8, country_str, "USA")) "US" else country_str;
 
diff --git a/src/format.zig b/src/format.zig
index ad0ec0e..e80fd1a 100644
--- a/src/format.zig
+++ b/src/format.zig
@@ -350,6 +350,25 @@ pub fn isCusipLike(s: []const u8) bool {
     return has_digit;
 }
 
+/// Convert a string to title case ("TECHNOLOGY" -> "Technology", "CONSUMER CYCLICAL" -> "Consumer Cyclical").
+/// Writes into a caller-provided buffer and returns the slice.
+pub fn toTitleCase(buf: []u8, s: []const u8) []const u8 {
+    const len = @min(s.len, buf.len);
+    var capitalize_next = true;
+    for (s[0..len], 0..) |c, i| {
+        if (c == ' ') {
+            buf[i] = ' ';
+            capitalize_next = true;
+        } else if (capitalize_next) {
+            buf[i] = std.ascii.toUpper(c);
+            capitalize_next = false;
+        } else {
+            buf[i] = std.ascii.toLower(c);
+        }
+    }
+    return buf[0..len];
+}
+
 /// Format an options contract line: strike + last + bid + ask + volume + OI + IV.
 pub fn fmtContractLine(alloc: std.mem.Allocator, prefix: []const u8, c: OptionContract) ![]const u8 {
     var last_buf: [12]u8 = undefined;
@@ -1070,6 +1089,15 @@ test "isCusipLike" {
     try std.testing.expect(!isCusipLike("12345")); // Too short
 }
 
+test "toTitleCase" {
+    var buf: [64]u8 = undefined;
+    try std.testing.expectEqualStrings("Technology", toTitleCase(&buf, "TECHNOLOGY"));
+    try std.testing.expectEqualStrings("Consumer Cyclical", toTitleCase(&buf, "CONSUMER CYCLICAL"));
+    try std.testing.expectEqualStrings("Healthcare", toTitleCase(&buf, "HEALTHCARE"));
+    try std.testing.expectEqualStrings("Technology", toTitleCase(&buf, "Technology"));
+    try std.testing.expectEqualStrings("Unknown", toTitleCase(&buf, "Unknown"));
+}
+
 test "lotSortFn" {
     const open_new = Lot{
         .symbol = "A",