From 3bd1ae9d63dbcb53dc518b380105759519a2ec1f Mon Sep 17 00:00:00 2001
From: Dima <dima@current.ai>
Date: Thu, 30 May 2024 16:11:26 +0200
Subject: [PATCH] added `<select>`

---
 src/lib_c5t_htmlform.cc | 66 +++++++++++++++++++++++++----------------
 src/lib_c5t_htmlform.h  | 16 +++++++++-
 src/wss.cc              | 13 +++++---
 3 files changed, 65 insertions(+), 30 deletions(-)

diff --git a/src/lib_c5t_htmlform.cc b/src/lib_c5t_htmlform.cc
index 398a269..4c1bfa9 100644
--- a/src/lib_c5t_htmlform.cc
+++ b/src/lib_c5t_htmlform.cc
@@ -1,5 +1,7 @@
 #include "lib_c5t_htmlform.h"  // IWYU pragma: keep
 
+#include "typesystem/serialization/json/primitives.h"  // IWYU pragma: keep
+
 #include <sstream>
 
 std::string current::htmlform::FormAsHTML(Form const& form) {
@@ -18,37 +20,51 @@ std::string current::htmlform::FormAsHTML(Form const& form) {
   oss << R"(
     <form id="form">)";
   for (auto const& f : form.fields) {
-    std::string input_type = "text";
-    if (Exists(f.type) && Value(f.type) == "password") {
-      input_type = "password";
-    }
     oss << R"(
       <p>)"
-        << (Exists(f.text) ? Value(f.text) : f.id) << R"(</p>
-      <input
-        type=)" + input_type;
-    if (Exists(f.type) && Value(f.type) == "readonly") {
+        << (Exists(f.text) ? Value(f.text) : f.id) << R"(</p>)";
+    std::string input_type = Exists(f.type) ? Value(f.type) : "text";
+    if (input_type == "select" && Exists(f.options) && !Value(f.options).empty()) {
+      std::string const default_option = Exists(f.default_option) ? Value(f.default_option) : Value(f.options).front();
       oss << R"(
-        disabled=disabled)";
-    }
-    oss << R"(
-        autocomplete=false
-        id=")"
-        << f.id << '"';
-    if (Exists(f.placeholder)) {
+        <select id=")"
+          << f.id << "\">";
+      for (auto const& o : Value(f.options)) {
+        oss << R"(
+          <option value=)"
+            << JSON(o) << (o == default_option ? " selected>" : ">") << o << "</option>";
+      }
       oss << R"(
-        placeholder=")"
-          << Value(f.placeholder) << '"';
-    }
-    if (Exists(f.value)) {
+        </select>
+        <br>)";
+    } else {
+      oss << R"(
+        <input
+          type=)" +
+                 input_type;
+      if (Exists(f.type) && Value(f.type) == "readonly") {
+        oss << R"(
+          disabled=disabled)";
+      }
       oss << R"(
-        value=")"
-          << Value(f.value) << '"';
+          autocomplete=false
+          id=")"
+          << f.id << '"';
+      if (Exists(f.placeholder)) {
+        oss << R"(
+          placeholder=")"
+            << Value(f.placeholder) << '"';
+      }
+      if (Exists(f.value)) {
+        oss << R"(
+          value=")"
+            << Value(f.value) << '"';
+      }
+      oss << R"(
+          size="100"
+        />
+        <br>)";
     }
-    oss << R"(
-        size="100"
-      />
-      <br>)";
   }
   oss << R"(
       <br>
diff --git a/src/lib_c5t_htmlform.h b/src/lib_c5t_htmlform.h
index f158223..00f561d 100644
--- a/src/lib_c5t_htmlform.h
+++ b/src/lib_c5t_htmlform.h
@@ -25,7 +25,9 @@ CURRENT_STRUCT(Field) {
   CURRENT_FIELD(text, Optional<std::string>);
   CURRENT_FIELD(placeholder, Optional<std::string>);
   CURRENT_FIELD(value, Optional<std::string>);
-  CURRENT_FIELD(type, Optional<std::string>);
+  CURRENT_FIELD(type, Optional<std::string>);  // can be unset, "readonly", "password", or "select"
+  CURRENT_FIELD(options, Optional<std::vector<std::string>>);
+  CURRENT_FIELD(default_option, Optional<std::string>);
 
   CURRENT_CONSTRUCTOR(Field)(std::string id = "id") : id(std::move(id)) {}
 
@@ -49,6 +51,18 @@ CURRENT_STRUCT(Field) {
     type = "password";
     return *this;
   }
+  Field& Select(std::vector<std::string> arg_options) {
+    type = "select";
+    options = std::move(arg_options);
+    default_option = nullptr;
+    return *this;
+  }
+  Field& Select(std::vector<std::string> arg_options, std::string arg_default_option) {
+    type = "select";
+    options = std::move(arg_options);
+    default_option = std::move(arg_default_option);
+    return *this;
+  }
 };
 
 CURRENT_STRUCT(Form) {
diff --git a/src/wss.cc b/src/wss.cc
index 63a1721..f0a415c 100644
--- a/src/wss.cc
+++ b/src/wss.cc
@@ -14,8 +14,9 @@
 
 CURRENT_STRUCT(StopResponseSchema) { CURRENT_FIELD(msg, std::string); };
 CURRENT_STRUCT(SumResponseSchema) {
-  CURRENT_FIELD(sum, int64_t);
+  CURRENT_FIELD(result, int64_t);
   CURRENT_FIELD(pw, Optional<std::string>);
+  CURRENT_FIELD(op, Optional<std::string>);
 };
 
 inline std::string BasePathOf(std::string const& s) {
@@ -124,6 +125,7 @@ int main(int argc, char** argv) {
     using namespace current::htmlform;
     if (r.method == "GET") {
       auto const f = Form()
+                         .Add(Field("e").Text("Operation").Select({"mul", "add"}, "add"))
                          .Add(Field("a").Text("First summand").Placeholder("3 for example").Value("3"))
                          .Add(Field("b").Text("Second summand").Placeholder("4 for example"))
                          .Add(Field("c").Text("Read-only caption").Value("Read-only text").Readonly())
@@ -136,7 +138,7 @@ int main(int argc, char** argv) {
         if (isNaN(a)) return { error: "A is not a number." };
         const b = parseInt(input.b);
         if (isNaN(b)) return { error: "B is not a number." };
-        return { sum: a + b, pw: String(input.d) };
+        return { result: (input.e === "mul" ? a * b : a + b), pw: String(input.d), op: input.e };
       })");
       r(FormAsHTML(f), HTTPResponseCode.OK, current::net::constants::kDefaultHTMLContentType);
     } else {
@@ -146,7 +148,10 @@ int main(int argc, char** argv) {
         if (Exists(body.pw)) {
           std::cout << "PW: " << Value(body.pw) << std::endl;
         }
-        res.fwd = "/is/" + current::ToString(body.sum);
+        if (Exists(body.op)) {
+          std::cout << "OP: " << Value(body.op) << std::endl;
+        }
+        res.fwd = "/is/" + current::ToString(body.result);
       } catch (current::Exception& e) {
         res.msg = "error!";
       }
@@ -155,7 +160,7 @@ int main(int argc, char** argv) {
   });
 
   routes += http.Register(
-      "/sum/is", URLPathArgs::CountMask::One, [](Request r) { r("the sum is " + r.url_path_args[0] + '\n'); });
+      "/sum/is", URLPathArgs::CountMask::One, [](Request r) { r("the result is " + r.url_path_args[0] + '\n'); });
 
   routes += http.Register("/dlib", [](Request r) {
     std::ostringstream oss;