From c3f8ed8ee4e7732ff2d1960ee728f917a81313a3 Mon Sep 17 00:00:00 2001
From: Nulo <nulo@sutty.nl>
Date: Fri, 25 Nov 2022 18:04:00 -0300
Subject: [PATCH] experimental

---
 .gitignore   |  3 ++
 .gitmodules  |  3 ++
 build.zig    | 40 ++++++++++++++++++++++++
 rem          |  1 +
 src/main.zig | 87 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 134 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 .gitmodules
 create mode 100644 build.zig
 create mode 160000 rem
 create mode 100644 src/main.zig

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b8d4465
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+zig-cache
+zig-out
+
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..7707d08
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "rem"]
+	path = rem
+	url = https://github.com/chwayne/rem
diff --git a/build.zig b/build.zig
new file mode 100644
index 0000000..5c7c203
--- /dev/null
+++ b/build.zig
@@ -0,0 +1,40 @@
+const std = @import("std");
+
+pub fn build(b: *std.build.Builder) void {
+    const rem_pkg = std.build.Pkg{
+        .name = "rem",
+        .source = .{ .path = "./rem/rem.zig" },
+    };
+
+    // Standard target options allows the person running `zig build` to choose
+    // what target to build for. Here we do not override the defaults, which
+    // means any target is allowed, and the default is native. Other options
+    // for restricting supported target set are available.
+    const target = b.standardTargetOptions(.{});
+
+    // Standard release options allow the person running `zig build` to select
+    // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall.
+    const mode = b.standardReleaseOptions();
+
+    const exe = b.addExecutable("site-analyzer", "src/main.zig");
+    exe.setTarget(target);
+    exe.setBuildMode(mode);
+    exe.addPackage(rem_pkg);
+    exe.install();
+
+    const run_cmd = exe.run();
+    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 exe_tests = b.addTest("src/main.zig");
+    exe_tests.setTarget(target);
+    exe_tests.setBuildMode(mode);
+
+    const test_step = b.step("test", "Run unit tests");
+    test_step.dependOn(&exe_tests.step);
+}
diff --git a/rem b/rem
new file mode 160000
index 0000000..53d2307
--- /dev/null
+++ b/rem
@@ -0,0 +1 @@
+Subproject commit 53d2307030c9b9ce3501b007de86b49b0838d3ae
diff --git a/src/main.zig b/src/main.zig
new file mode 100644
index 0000000..101c469
--- /dev/null
+++ b/src/main.zig
@@ -0,0 +1,87 @@
+const std = @import("std");
+const rem = @import("rem");
+
+fn utf8DecodeString(allocator: std.mem.Allocator, string: []const u8) ![]u21 {
+    var list = std.ArrayList(u21).init(allocator);
+    errdefer list.deinit();
+
+    var decoded_it = (try std.unicode.Utf8View.init(string)).iterator();
+    while (decoded_it.nextCodepoint()) |codepoint| {
+        try list.append(codepoint);
+    }
+    return list.toOwnedSlice();
+}
+
+pub fn main() !u8 {
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    defer _ = gpa.deinit();
+    const allocator = gpa.allocator();
+
+    const string = try std.io.getStdIn().readToEndAlloc(allocator, 1024 * 1024);
+    // The string must be decoded before it can be passed to the parser.
+    // const input = &rem.util.utf8DecodeStringComptime(string);
+    const input = try utf8DecodeString(allocator, string);
+
+    // Create the DOM in which the parsed Document will be created.
+    var dom = rem.dom.Dom{ .allocator = allocator };
+    defer dom.deinit();
+
+    var parser = try rem.Parser.init(&dom, input, allocator, .abort, false);
+    defer parser.deinit();
+    try parser.run();
+
+    const errors = parser.errors();
+    if (errors.len > 0) {
+        std.log.err("A parsing error occured!\n{s}\n", .{@tagName(errors[0])});
+        return 1;
+    }
+
+    // const writer = std.io.getStdOut().writer();
+    const document = parser.getDocument();
+
+    // try rem.util.printDocument(writer, document, &dom, allocator);
+    check(document.element.?);
+    return 0;
+}
+const startsWith = std.mem.startsWith;
+const startsWithIgnoreCase = std.ascii.startsWithIgnoreCase;
+
+fn isHttps(url: []const u8) bool {
+    return startsWithIgnoreCase(url, "//") or
+        startsWithIgnoreCase(url, "http://") or
+        startsWithIgnoreCase(url, "https://");
+}
+fn isAbsolute(url: []const u8) bool {
+    return startsWithIgnoreCase(url, "/");
+}
+
+fn check(element: *const rem.dom.Element) void {
+    // std.log.info("{any}", .{element.element_type});
+    switch (element.element_type) {
+        .html_img => {
+            if (element.attributes.getEntry("alt") == null) {
+                std.log.err("img with no alt text", .{});
+            }
+        },
+        .html_a => {
+            if (element.attributes.getEntry("href")) |entry| {
+                const href = entry.value_ptr.*;
+                if (isHttps(href)) {
+                    std.log.warn("link to http/s: {s}", .{href});
+                } else if (isAbsolute(href)) {
+                    std.log.warn("absolute link: {s}", .{href});
+                }
+            } else {
+                std.log.warn("link with no href", .{});
+            }
+        },
+
+        else => {},
+    }
+    // for (element.children.items) |child| {
+    //     switch (child) {
+    //         .element => |el| check(el),
+    //         .cdata => |cdata| std.log.info("cdata: {s}", .{cdata.data.items}),
+    //     }
+    // }
+}