commit e1d3d98fed17e46acf7825de91254684bac4e84f
Author: Dario48 <Dario48true@proton.me>
Date:   Sat Aug 30 15:26:01 2025 +0200

    guh (add everything)

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ed4cf88
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+zig-out
+.zig-cache
+.DS_Store
diff --git a/build.zig b/build.zig
new file mode 100644
index 0000000..897f764
--- /dev/null
+++ b/build.zig
@@ -0,0 +1,66 @@
+const std = @import("std");
+
+// Although this function looks imperative, note that its job is to
+// declaratively construct a build graph that will be executed by an external
+// runner.
+pub fn build(b: *std.Build) void {
+    const target = b.standardTargetOptions(.{});
+
+    const optimize = b.standardOptimizeOption(.{});
+
+    const lib_mod = b.createModule(.{
+        .root_source_file = b.path("src/root.zig"),
+        .target = target,
+        .optimize = optimize,
+    });
+
+    const exe_mod = b.createModule(.{
+        .root_source_file = b.path("src/main.zig"),
+        .target = target,
+        .optimize = optimize,
+    });
+
+    exe_mod.addImport("taggr_lib", lib_mod);
+
+    const lib = b.addLibrary(.{
+        .linkage = .static,
+        .name = "taggr",
+        .root_module = lib_mod,
+    });
+
+    b.installArtifact(lib);
+
+    const exe = b.addExecutable(.{
+        .name = "taggr",
+        .root_module = exe_mod,
+    });
+
+    b.installArtifact(exe);
+
+    const run_cmd = b.addRunArtifact(exe);
+
+    run_cmd.step.dependOn(b.getInstallStep());
+
+    if (b.args) |args| {
+        run_cmd.addArgs(args);
+    }
+
+    const run_step = b.step("run", "Run the app");
+    run_step.dependOn(&run_cmd.step);
+
+    const lib_unit_tests = b.addTest(.{
+        .root_module = lib_mod,
+    });
+
+    const run_lib_unit_tests = b.addRunArtifact(lib_unit_tests);
+
+    const exe_unit_tests = b.addTest(.{
+        .root_module = exe_mod,
+    });
+
+    const run_exe_unit_tests = b.addRunArtifact(exe_unit_tests);
+
+    const test_step = b.step("test", "Run unit tests");
+    test_step.dependOn(&run_lib_unit_tests.step);
+    test_step.dependOn(&run_exe_unit_tests.step);
+}
diff --git a/build.zig.zon b/build.zig.zon
new file mode 100644
index 0000000..0f81a44
--- /dev/null
+++ b/build.zig.zon
@@ -0,0 +1,86 @@
+.{
+    // This is the default name used by packages depending on this one. For
+    // example, when a user runs `zig fetch --save <url>`, this field is used
+    // as the key in the `dependencies` table. Although the user can choose a
+    // different name, most users will stick with this provided value.
+    //
+    // It is redundant to include "zig" in this name because it is already
+    // within the Zig package namespace.
+    .name = .taggr,
+
+    // This is a [Semantic Version](https://semver.org/).
+    // In a future version of Zig it will be used for package deduplication.
+    .version = "0.0.0",
+
+    // Together with name, this represents a globally unique package
+    // identifier. This field is generated by the Zig toolchain when the
+    // package is first created, and then *never changes*. This allows
+    // unambiguous detection of one package being an updated version of
+    // another.
+    //
+    // When forking a Zig project, this id should be regenerated (delete the
+    // field and run `zig build`) if the upstream project is still maintained.
+    // Otherwise, the fork is *hostile*, attempting to take control over the
+    // original project's identity. Thus it is recommended to leave the comment
+    // on the following line intact, so that it shows up in code reviews that
+    // modify the field.
+    .fingerprint = 0x90c511a182377f7b, // Changing this has security and trust implications.
+
+    // Tracks the earliest Zig version that the package considers to be a
+    // supported use case.
+    .minimum_zig_version = "0.14.1",
+
+    // This field is optional.
+    // Each dependency must either provide a `url` and `hash`, or a `path`.
+    // `zig build --fetch` can be used to fetch all dependencies of a package, recursively.
+    // Once all dependencies are fetched, `zig build` no longer requires
+    // internet connectivity.
+    .dependencies = .{
+        // See `zig fetch --save <url>` for a command-line interface for adding dependencies.
+        //.example = .{
+        //    // When updating this field to a new URL, be sure to delete the corresponding
+        //    // `hash`, otherwise you are communicating that you expect to find the old hash at
+        //    // the new URL. If the contents of a URL change this will result in a hash mismatch
+        //    // which will prevent zig from using it.
+        //    .url = "https://example.com/foo.tar.gz",
+        //
+        //    // This is computed from the file contents of the directory of files that is
+        //    // obtained after fetching `url` and applying the inclusion rules given by
+        //    // `paths`.
+        //    //
+        //    // This field is the source of truth; packages do not come from a `url`; they
+        //    // come from a `hash`. `url` is just one of many possible mirrors for how to
+        //    // obtain a package matching this `hash`.
+        //    //
+        //    // Uses the [multihash](https://multiformats.io/multihash/) format.
+        //    .hash = "...",
+        //
+        //    // When this is provided, the package is found in a directory relative to the
+        //    // build root. In this case the package's hash is irrelevant and therefore not
+        //    // computed. This field and `url` are mutually exclusive.
+        //    .path = "foo",
+        //
+        //    // When this is set to `true`, a package is declared to be lazily
+        //    // fetched. This makes the dependency only get fetched if it is
+        //    // actually used.
+        //    .lazy = false,
+        //},
+    },
+
+    // Specifies the set of files and directories that are included in this package.
+    // Only files and directories listed here are included in the `hash` that
+    // is computed for this package. Only files listed here will remain on disk
+    // when using the zig package manager. As a rule of thumb, one should list
+    // files required for compilation plus any license(s).
+    // Paths are relative to the build root. Use the empty string (`""`) to refer to
+    // the build root itself.
+    // A directory listed here means that all files within, recursively, are included.
+    .paths = .{
+        "build.zig",
+        "build.zig.zon",
+        "src",
+        // For example...
+        //"LICENSE",
+        //"README.md",
+    },
+}
diff --git a/src/main.zig b/src/main.zig
new file mode 100644
index 0000000..6054e5e
--- /dev/null
+++ b/src/main.zig
@@ -0,0 +1,14 @@
+//! cli application to tag files
+//! todo: make it work
+
+pub fn main() !void {
+    var tags = try lib.retrieve_tags(.{});
+    defer lib.deallocate_top_tag(&tags);
+
+    var image = try lib.get_images(tags.tags[0]);
+    defer image.deinit();
+}
+
+const std = @import("std");
+
+const lib = @import("taggr_lib");
diff --git a/src/root.zig b/src/root.zig
new file mode 100644
index 0000000..5c45879
--- /dev/null
+++ b/src/root.zig
@@ -0,0 +1,246 @@
+//! library that tags photos and keeps track of them
+//! todo: implement
+const std = @import("std");
+const builtin = @import("builtin");
+
+pub const errors = error{UnsupportedPlatform};
+
+pub const retrieve_options = struct {
+    pub const tags = struct {
+        path: ?std.fs.Dir = null,
+        allocator: std.mem.Allocator = std.heap.smp_allocator,
+    };
+};
+
+const top_tag = struct {
+    allocator: std.mem.Allocator,
+    path: std.fs.Dir,
+    tags: []tag,
+    zon: zon_struct,
+};
+
+const tag = struct {
+    name: []const u8,
+    parent: *top_tag,
+    children: ?[]tag,
+};
+
+const zon_struct = struct {
+    name: []const u8,
+    children: ?[]zon_struct,
+};
+
+const zon_file_struct = struct {
+    name: []u8,
+    filename: []u8,
+};
+
+const zon_tag_struct = struct {
+    files: []zon_file_struct,
+};
+
+pub fn retrieve_tags(options: retrieve_options.tags) !top_tag {
+    var buffer: [1024]u8 = undefined;
+    const conf_dir: std.fs.Dir = if (options.path) |user_conf_dir| user_conf_dir else switch (builtin.os.tag) {
+        .windows => blk: {
+            const homedir = try std.process.getEnvVarOwned(options.allocator, "APPDATA");
+            defer options.allocator.free(homedir);
+            const home_dir = try std.fs.openDirAbsolute(homedir, .{});
+            break :blk home_dir.openDir("taggr", .{}) catch |open_dir_err| switch (open_dir_err) {
+                error.FileNotFound => {
+                    std.log.debug("FileNotFound, falling back to makeOpenPath", .{});
+                    try home_dir.makeOpenPath("taggr", .{});
+                },
+                else => return open_dir_err,
+            };
+        },
+        .linux,
+        .openbsd,
+        .freebsd,
+        .dragonfly,
+        .netbsd,
+        .macos,
+        => blk: {
+            const homedir = try std.process.getEnvVarOwned(options.allocator, "HOME");
+            defer options.allocator.free(homedir);
+            const home_dir = try std.fs.openDirAbsolute(homedir, .{});
+            break :blk home_dir.openDir(".local/share/taggr", .{}) catch |open_dir_err| switch (open_dir_err) {
+                error.FileNotFound => blk_inner: {
+                    std.log.debug("FileNotFound, falling back to makeOpenPath", .{});
+                    break :blk_inner try home_dir.makeOpenPath(".local/share/taggr", .{});
+                },
+                else => return open_dir_err,
+            };
+        },
+        else => return errors.UnsupportedPlatform,
+    };
+
+    std.log.debug("path: {s}", .{try conf_dir.realpath(".", &buffer)});
+
+    const conf_path = if (options.path) |config_path| config_path.openFile("config.zon", .{}) catch |open_file_err| switch (open_file_err) {
+        error.FileNotFound => try config_path.createFile("config.zon", .{}),
+        else => return open_file_err,
+    } else conf_dir.createFile("config.zon", .{}) catch |open_file_err| switch (open_file_err) {
+        error.FileNotFound => blk: {
+            std.log.debug("FileNotFound, falling back to createFile", .{});
+            break :blk try conf_dir.createFile("config.zon", .{});
+        },
+        else => return open_file_err,
+    };
+
+    var initTag = top_tag{
+        .tags = undefined,
+        .allocator = options.allocator,
+        .path = conf_dir,
+        .zon = undefined,
+    };
+
+    var diag = std.zon.parse.Diagnostics{};
+
+    var zon_file = std.Io.Writer.Allocating.init(options.allocator);
+
+    var conf_path_buffer: [1024]u8 = undefined;
+    var reader = conf_path.reader(&conf_path_buffer).interface;
+
+    var stdout_buffer: [1024]u8 = undefined;
+    var stdout = std.fs.File.stdout().writer(&stdout_buffer);
+
+    _ = reader.stream(&stdout.interface, .unlimited) catch |stream_error| switch (stream_error) {
+        error.EndOfStream => {},
+        else => return stream_error,
+    };
+
+    try stdout.interface.flush();
+
+    _ = reader.stream(&zon_file.writer, .unlimited) catch |stream_error| switch (stream_error) {
+        error.EndOfStream => {},
+        else => return stream_error,
+    };
+
+    const zon_file_written = zon_file.written();
+
+    const zon = std.zon.parse.fromSlice(zon_struct, options.allocator, zon_file_written[0 .. zon_file_written.len - 1 :0], &diag, .{}) catch |zon_error| switch (zon_error) {
+        error.ParseZon => {
+            var Writer = std.Io.Writer.Allocating.init(options.allocator);
+            try diag.format(&Writer.writer);
+            std.log.err("\n", .{});
+            std.log.err("{s}", .{Writer.written()});
+            diag.deinit(options.allocator);
+            Writer.deinit();
+            return zon_error;
+        },
+        else => return zon_error,
+    };
+
+    conf_path.close();
+
+    zon_file.deinit();
+
+    initTag.tags = try parse_zon_tag_root(zon, options.allocator, &initTag);
+
+    return initTag;
+}
+
+fn parse_zon_tag_root(zon_root: zon_struct, allocator: std.mem.Allocator, parent: *top_tag) ![]tag {
+    return (try optional_zon_struct_slice_to_optional_tag_slice(zon_root.children, allocator, parent)).?;
+}
+
+fn optional_zon_struct_slice_to_optional_tag_slice(zon_tags_optional: ?[]zon_struct, allocator: std.mem.Allocator, parent: *top_tag) !?[]tag {
+    if (zon_tags_optional) |zon_tags| {
+        var gen_tags = try allocator.alloc(tag, zon_tags.len);
+        for (zon_tags, 0..) |zon_tag, i| {
+            gen_tags[i] = tag{
+                .children = try optional_zon_struct_slice_to_optional_tag_slice(zon_tag.children, allocator, parent),
+                .parent = parent,
+                .name = zon_tag.name,
+            };
+        }
+        return gen_tags;
+    }
+    return null;
+}
+
+pub fn deallocate_top_tag(allocated_tag: *top_tag) void {
+    deallocate_tag(allocated_tag.tags);
+    std.zon.parse.free(allocated_tag.allocator, allocated_tag.zon);
+    allocated_tag.path.close();
+}
+
+fn deallocate_tag(to_deallocate: ?[]tag) void {
+    if (to_deallocate) |children| {
+        for (children) |child| {
+            deallocate_tag(child.children);
+        }
+        children[0].parent.allocator.free(children);
+    }
+}
+
+const images = struct {
+    pub const image = struct {
+        path: []const u8,
+        name: []const u8,
+    };
+    paths: []image,
+    allocator: std.mem.Allocator,
+    pub fn deinit(self: images) void {
+        self.allocator.free(self.paths);
+    }
+};
+
+/// returns the path to the images tagged with the given tag
+/// the resoult needs to be deallocated with deinit
+pub fn get_images(needed_tag: tag) !images {
+    const allocator = needed_tag.parent.allocator;
+    if (needed_tag.children) |children| {
+        var image_arraylist = std.ArrayList(images).empty;
+
+        for (children) |child| {
+            try image_arraylist.append(allocator, try get_images(child));
+        }
+
+        const image_array = try image_arraylist.toOwnedSlice(allocator);
+        var image_names_arraylist = std.ArrayList(images.image).empty;
+
+        for (image_array) |image| {
+            try image_names_arraylist.appendSlice(allocator, image.paths);
+            image.deinit();
+        }
+
+        allocator.free(image_array);
+
+        return images{
+            .allocator = allocator,
+            .paths = try image_names_arraylist.toOwnedSlice(allocator),
+        };
+    }
+
+    var buffer: [1024]u8 = undefined;
+
+    const filename: [:0]u8 = @ptrCast(try std.fmt.allocPrintSentinel(allocator, switch (@import("builtin").os.tag) {
+        .windows => "{s}\\{s}",
+        .linux,
+        .openbsd,
+        .freebsd,
+        .dragonfly,
+        .netbsd,
+        .macos,
+        => "{s}/{s}",
+        else => return errors.UnsupportedPlatform,
+    }, .{ try needed_tag.parent.path.realpath(".", &buffer), needed_tag.name }, 0));
+    const zon_tag = try std.zon.parse.fromSlice(zon_tag_struct, allocator, filename, null, .{});
+    var paths = try allocator.alloc(images.image, zon_tag.files.len);
+
+    for (zon_tag.files, 0..) |file, i| {
+        paths[i] = images.image{
+            .name = file.name,
+            .path = try needed_tag.parent.path.realpath(file.filename, &buffer),
+        };
+    }
+
+    std.zon.parse.free(allocator, zon_tag);
+
+    return images{
+        .allocator = allocator,
+        .paths = paths,
+    };
+}