Unify ini parsing logic

Signed-off-by: AnErrupTion <anerruption@disroot.org>

ly-core/src/root.zig

@@ -1,4 +1,76 @@
+const std = @import("std");
+const ini = @import("zigini");
+
 pub const interop = @import("interop.zig");
 pub const UidRange = @import("UidRange.zig");
 pub const LogFile = @import("LogFile.zig");
 pub const SharedError = @import("SharedError.zig");
+
+pub fn IniParser(comptime Struct: type) type {
+    return struct {
+        const Self = @This();
+        const temporary_allocator = std.heap.page_allocator;
+
+        pub const Error = struct {
+            type_name: []const u8,
+            key: []const u8,
+            value: []const u8,
+            error_name: []const u8,
+        };
+        pub var global_errors: std.ArrayList(Error) = .empty;
+
+        ini_struct: ini.Ini(Struct),
+        structure: Struct,
+        maybe_load_error: ?anyerror,
+        errors: std.ArrayList(Error),
+
+        pub fn init(
+            allocator: std.mem.Allocator,
+            path: []const u8,
+            field_handler: ?fn (allocator: std.mem.Allocator, field: ini.IniField) ?ini.IniField,
+        ) !Self {
+            var ini_struct = ini.Ini(Struct).init(allocator);
+            errdefer ini_struct.deinit();
+
+            var maybe_load_error: ?anyerror = null;
+
+            const structure = ini_struct.readFileToStruct(path, .{
+                .fieldHandler = field_handler,
+                .errorHandler = errorHandler,
+                .comment_characters = "#",
+            }) catch |err| load_error: {
+                maybe_load_error = err;
+                break :load_error Struct{};
+            };
+
+            return .{
+                .ini_struct = ini_struct,
+                .structure = structure,
+                .maybe_load_error = maybe_load_error,
+                .errors = global_errors,
+            };
+        }
+
+        pub fn deinit(self: *Self) void {
+            self.ini_struct.deinit();
+
+            for (0..global_errors.items.len) |i| {
+                const err = global_errors.items[i];
+                temporary_allocator.free(err.type_name);
+                temporary_allocator.free(err.key);
+                temporary_allocator.free(err.value);
+            }
+
+            global_errors.deinit(temporary_allocator);
+        }
+
+        fn errorHandler(type_name: []const u8, key: []const u8, value: []const u8, err: anyerror) void {
+            global_errors.append(temporary_allocator, .{
+                .type_name = temporary_allocator.dupe(u8, type_name) catch return,
+                .key = temporary_allocator.dupe(u8, key) catch return,
+                .value = temporary_allocator.dupe(u8, value) catch return,
+                .error_name = @errorName(err),
+            }) catch return;
+        }
+    };
+}