Proof of concept artist name in url string

Some of my favorite code in the project. Just need a disambiguation page, and we're in business here

src/app/views/artists.zig

@@ -2,9 +2,10 @@ const std = @import("std");
 const jetzig = @import("jetzig");
 const jetquery = @import("jetzig").jetquery;
 const TableRow = @import("../../types.zig").TableRow;
-const dateFmt = @import("../../date_fmt.zig").dateFmt;
+//const dateFmt = @import("../../date_fmt.zig").dateFmt;
-const ordinalFmt = @import("../../ordinal_fmt.zig").ordinalFmt;
+//const ordinalFmt = @import("../../ordinal_fmt.zig").ordinalFmt;
 const queries = @import("../../queries.zig");
+const decode = @import("../../date_fmt.zig").urlDecode;
 
 pub fn index(request: *jetzig.Request) !jetzig.View {
     var root = try request.data(.object);
@@ -16,21 +17,45 @@ pub fn index(request: *jetzig.Request) !jetzig.View {
 }
 
 pub fn get(id: []const u8, request: *jetzig.Request) !jetzig.View {
+    const parse_err = blk: {
+        const rdr_id = std.fmt.parseInt(i64, id, 10) catch |err| break :blk err;
+        const artist = try jetzig.database.Query(.Artist).find(rdr_id).execute(request.repo);
+        if (artist == null) break :blk error.InvalidCharacter;
+        var name = std.ArrayList(u8).init(request.allocator);
+        try name.appendSlice("http://127.0.0.1:8080/artists/");
+        try name.appendSlice(artist.?.name);
+        return request.redirect(try name.toOwnedSlice(), .found);
+    };
+
+    const id_int = switch (parse_err) {
+        error.Overflow => return request.fail(.not_found),
+        error.InvalidCharacter => blk: {
+            const rn = try decode(request.allocator, id);
+            std.log.debug("{s}", .{rn});
+            const artists = try jetzig.database.Query(.Artist).where(.{ .name = rn }).all(request.repo);
+
+            if (artists.len == 0) return request.fail(.not_found);
+            if (artists.len > 1) return request.redirect("http://127.0.0.1:8080", .found);
+            break :blk artists[0].id;
+        },
+        else => unreachable,
+    };
+
     var root = try request.data(.object);
 
-    const artist = try queries.entityQueryResult(request, queries.loadQuery(.artist, .entity_info), .{id});
+    const artist = try queries.entityQueryResult(request, queries.loadQuery(.artist, .entity_info), .{id_int});
     try root.put("artist", artist);
 
-    const albums = try queries.entityQueryResult(request, queries.loadQuery(.artist, .get_albums), .{id});
+    const albums = try queries.entityQueryResult(request, queries.loadQuery(.artist, .get_albums), .{id_int});
     try root.put("albums", albums);
 
-    const appears = try queries.entityQueryResult(request, queries.loadQuery(.artist, .appears), .{id});
+    const appears = try queries.entityQueryResult(request, queries.loadQuery(.artist, .appears), .{id_int});
     try root.put("appears", appears);
 
-    const firstlast = try queries.entityQueryResult(request, queries.loadQuery(.artist, .firstlast), .{id});
+    const firstlast = try queries.entityQueryResult(request, queries.loadQuery(.artist, .firstlast), .{id_int});
     try root.put("firstlast", firstlast);
 
-    const timescale = try queries.entityQueryResult(request, queries.loadQuery(.artist, .timescale), .{id});
+    const timescale = try queries.entityQueryResult(request, queries.loadQuery(.artist, .timescale), .{id_int});
     try root.put("yearly", timescale);
 
     return request.render(.ok);

src/date_fmt.zig

@@ -33,3 +33,20 @@ pub fn scrobbleToRow(allocator: std.mem.Allocator, scrobble: Data.Scrobble) !Dat
         .date = try dateFmt(allocator, scrobble.date),
     };
 }
+
+pub fn urlDecode(allocator: std.mem.Allocator, str: []const u8) ![]const u8 {
+    var decoded = std.ArrayList(u8).init(allocator);
+    var i: usize = 0;
+    while (i < str.len) : (i += 1) {
+        const v = str[i];
+        if (v == '%') {
+            if (i + 2 < str.len) {
+                const hex = str[i + 1 .. i + 3];
+                const char = try std.fmt.parseInt(u8, hex, 16);
+                try decoded.append(char);
+                i += 2;
+            } else return error.InvalidInput;
+        } else try decoded.append(v);
+    }
+    return decoded.toOwnedSlice();
+}