FIX: min/max not passed to NumberField for site settings (#24402)

When we started using NumberField for integer site settings
in e113eff663, we did not end up
passing down a min/max value for the integer to the field, which
meant that for some fields where negative numbers were allowed
we were not accepting that as valid input.

This commit passes down the min/max options from the server for
integer settings then in turn passes them down to NumberField.

c.f. https://meta.discourse.org/t/delete-user-self-max-post-count-not-accepting-1-to-disable/285162

app/assets/javascripts/admin/addon/components/site-settings/integer.hbs

@@ -1,4 +1,9 @@
-<NumberField @value={{this.value}} @classNames="input-setting-integer" />
+<NumberField
+  @value={{this.value}}
+  @classNames="input-setting-integer"
+  @min={{(if this.setting.min this.setting.min null)}}
+  @max={{(if this.setting.max this.setting.max null)}}
+/>
 
 <SettingValidationMessage @message={{this.validationMessage}} />
 <div class="desc">{{html-safe this.setting.description}}</div>

app/assets/javascripts/discourse/app/components/number-field.js

@@ -26,13 +26,27 @@ const ALLOWED_KEYS = [
 export default TextField.extend({
   classNameBindings: ["invalid"],
 
-  keyDown: function (e) {
+  keyDown: function (event) {
     return (
-      ALLOWED_KEYS.includes(e.key) ||
-      (e.key === "-" && parseInt(this.get("min"), 10) < 0)
+      ALLOWED_KEYS.includes(event.key) ||
+      (event.key === "-" && this._minNumber && this._minNumber < 0)
     );
   },
 
+  get _minNumber() {
+    if (!this.get("min")) {
+      return;
+    }
+    return parseInt(this.get("min"), 10);
+  },
+
+  get _maxNumber() {
+    if (!this.get("max")) {
+      return;
+    }
+    return parseInt(this.get("max"), 10);
+  },
+
   @discourseComputed("number")
   value: {
     get(number) {

app/assets/javascripts/discourse/tests/integration/components/number-field-test.js

@@ -0,0 +1,62 @@
+import { fillIn, render, triggerKeyEvent } from "@ember/test-helpers";
+import { hbs } from "ember-cli-htmlbars";
+import { module, test } from "qunit";
+import { setupRenderingTest } from "discourse/tests/helpers/component-test";
+
+module("Integration | Component | number-field", function (hooks) {
+  setupRenderingTest(hooks);
+
+  test("number field", async function (assert) {
+    this.set("value", 123);
+
+    await render(hbs`
+      <NumberField @value={{this.value}} @classNames="number-field-test" />
+    `);
+
+    await fillIn(".number-field-test", "33");
+
+    assert.equal(
+      this.get("value"),
+      33,
+      "value is changed when the input is a valid number"
+    );
+
+    await fillIn(".number-field-test", "");
+    await triggerKeyEvent(".number-field-test", "keydown", 66); // b
+
+    assert.equal(
+      this.get("value"),
+      "",
+      "value is cleared when the input is NaN"
+    );
+  });
+
+  test("number field | min value", async function (assert) {
+    this.set("value", "");
+
+    await render(hbs`
+      <NumberField @value={{this.value}} @classNames="number-field-test" @min="1" />
+    `);
+
+    await triggerKeyEvent(".number-field-test", "keydown", 189); // -
+    await triggerKeyEvent(".number-field-test", "keydown", 49); // 1
+
+    assert.equal(
+      this.get("value"),
+      "",
+      "value is cleared when the input is less than the min"
+    );
+
+    await render(hbs`
+      <NumberField @value={{this.value}} @classNames="number-field-test" @min="-10" />
+    `);
+
+    await fillIn(".number-field-test", "-1");
+
+    assert.equal(
+      this.get("value"),
+      "-1",
+      "negative input allowed when min is negative"
+    );
+  });
+});

lib/site_settings/type_supervisor.rb

@@ -180,6 +180,17 @@ class SiteSettings::TypeSupervisor
       end
     end
 
+    if type == :integer
+      result[:min] = @validators[name].dig(:opts, :min) if @validators[name].dig(
+        :opts,
+        :min,
+      ).present?
+      result[:max] = @validators[name].dig(:opts, :max) if @validators[name].dig(
+        :opts,
+        :max,
+      ).present?
+    end
+
     result[:allow_any] = @allow_any[name] if type == :list
 
     result[:choices] = @choices[name] if @choices.has_key? name

spec/lib/site_settings/type_supervisor_spec.rb

@@ -418,7 +418,7 @@ RSpec.describe SiteSettings::TypeSupervisor do
 
     before do
       settings.setting(:type_null, nil)
-      settings.setting(:type_int, 1)
+      settings.setting(:type_int, 1, min: -10, max: 10)
       settings.setting(:type_true, true)
       settings.setting(:type_float, 2.3232)
       settings.setting(:type_string, "string")
@@ -433,24 +433,31 @@ RSpec.describe SiteSettings::TypeSupervisor do
     it "returns null type" do
       expect(settings.type_supervisor.type_hash(:type_null)[:type]).to eq "null"
     end
+
     it "returns int type" do
       expect(settings.type_supervisor.type_hash(:type_int)[:type]).to eq "integer"
     end
+
     it "returns bool type" do
       expect(settings.type_supervisor.type_hash(:type_true)[:type]).to eq "bool"
     end
+
     it "returns float type" do
       expect(settings.type_supervisor.type_hash(:type_float)[:type]).to eq "float"
     end
+
     it "returns string type" do
       expect(settings.type_supervisor.type_hash(:type_string)[:type]).to eq "string"
     end
+
     it "returns url_list type" do
       expect(settings.type_supervisor.type_hash(:type_url_list)[:type]).to eq "url_list"
     end
+
     it "returns textarea type" do
       expect(settings.type_supervisor.type_hash(:type_textarea)[:textarea]).to eq true
     end
+
     it "returns enum type" do
       expect(settings.type_supervisor.type_hash(:type_enum_choices)[:type]).to eq "enum"
     end
@@ -474,5 +481,10 @@ RSpec.describe SiteSettings::TypeSupervisor do
       expect(hash[:valid_values]).to eq %w[a b]
       expect(hash[:translate_names]).to eq false
     end
+
+    it "returns int min/max values" do
+      expect(settings.type_supervisor.type_hash(:type_int)[:min]).to eq(-10)
+      expect(settings.type_supervisor.type_hash(:type_int)[:max]).to eq(10)
+    end
   end
 end