update

.gitignore

@@ -0,0 +1,3 @@
+.idea/
+.zig-cache/
+todo-db.txt

Zig.iml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module version="4">
+  <component name="NewModuleRootManager">
+    <orderEntry type="library" name="Zig SDK" level="project" />
+  </component>
+</module>

src/interaction.zig

@@ -15,15 +15,24 @@ pub fn userInteraction(allocator: std.mem.Allocator, tasks: *std.ArrayList([]con
             failure += 1;
             continue;
         };
-        try stdout.print("Please enter your choice [add/remove/edit/quit]: ", .{});
+
+        // todo make available commads be listed from enum itself
+        const Case = enum { add, edit, remove, move, quit };
+
+        var fields = std.ArrayList([]const u8).init(allocator);
+        defer fields.deinit();
+
+        inline for (@typeInfo(Case).Enum.fields) |f| {
+            fields.append(f.name);
+        }
+        try stdout.print("Please enter your choice [add/remove/edit/move/quit]: ", .{});
         const input = getInput(allocator) catch |err| {
             std.debug.print("Error acquiring input:\n{}\n", .{err});
             continue;
         };
         defer allocator.free(input);
-        // todo add option to manipulate tasks via numbers (and add numbers to tasks)
 
-        const Case = enum { add, edit, remove, quit };
+
         const case = std.meta.stringToEnum(Case, input) orelse continue;
 
         var task_name: []const u8 = undefined;
@@ -70,11 +79,56 @@ pub fn userInteraction(allocator: std.mem.Allocator, tasks: *std.ArrayList([]con
                 allocator.free(tasks.items[id]);
                 _ = tasks.orderedRemove(id);
             },
+            .move => {
+                try stdout.print("Please enter task name or number: ", .{});
+                _ = getTaskIndex(tasks, task_name) catch {
+                    std.debug.print("Invalid task name...", .{});
+                    continue;
+                };
+
+                const new_input = getInput(allocator) catch |err| {
+                    std.debug.print("Failed to get new input:\n{}\n", .{err});
+                    continue;
+                };
+                defer allocator.free(new_input);
+
+                _ = std.fmt.parseInt(usize, new_input, 10) catch |err| {
+                    std.debug.print("Failed to convert the input into ID:\n{}\n", .{err});
+                    continue;
+                };
+
+                // todo restructure arraylist
+            },
             .quit => break,
         }
     }
 }
 
+fn get_fields_str(allocator: std.mem.Allocator, arr: std.ArrayList([]const u8)) ![]const u8 {
+    // get len
+    var len = 0;
+    for (arr.items) |value| {
+        len += value.len;
+    }
+    len += arr.capacity - 1;
+
+    // todo free mem
+    var result = try allocator.alloc(u8, len);
+    defer allocator.free(result);
+
+    var cur_len = 0;
+    for (arr.items) |value| {
+        @memcpy(result[0..], value);
+        cur_len += value.len;
+
+        if (value == arr.items[arr.capacity-1]) continue;
+        @memcpy(result[cur_len..], "/");
+        cur_len += 1;
+    }
+
+    return result;
+}
+
 fn getInput(allocator: std.mem.Allocator) ![]const u8 {
     const stdin = std.io.getStdIn().reader();
     const bare_line = try stdin.readUntilDelimiterAlloc(allocator, '\n', 8192);
@@ -84,11 +138,19 @@ fn getInput(allocator: std.mem.Allocator) ![]const u8 {
 }
 
 fn getTaskIndex(tasks: *std.ArrayList([]const u8), task_name: []const u8) !usize {
-    for (tasks.items, 0..) |value, i| {
-        if (std.mem.eql(u8, task_name, value)) {
-            return i;
+    if (tasks.items.len == 0) return InteractionError.TaskNotFound;
+    const task_id = std.fmt.parseInt(usize, task_name, 10) catch {
+        for (tasks.items, 0..) |value, i| {
+            if (std.mem.eql(u8, task_name, value)) {
+                return i;
+            }
         }
-    }
+
+        return InteractionError.TaskNotFound;
+    };
+
+    const act_val = task_id - 1;
+    if (act_val >= 0 and act_val < tasks.items.len) return act_val;
 
     return InteractionError.TaskNotFound;
 }
@@ -100,8 +162,8 @@ fn printItems(tasks: *std.ArrayList([]const u8)) !void {
     }
 
     try stdout.print("Items:\n------\n", .{});
-    for (tasks.items) |value| {
-        try stdout.print("{s}\n", .{value});
+    for (tasks.items, 1..) |value, i| {
+        try stdout.print("{d}. {s}\n", .{i, value});
     }
     try stdout.print("\n", .{});
 }