Initial commit

.gitignore

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+/.idea
+/vendor
+/node_modules
+package-lock.json
+composer.phar
+composer.lock
+phpunit.xml
+.phpunit.result.cache
+.DS_Store
+Thumbs.db

composer.json

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+{
+    "name": "codelabs/seo-title",
+    "description": "A Laravel Nova field.",
+    "keywords": [
+        "laravel",
+        "nova"
+    ],
+    "license": "MIT",
+    "require": {
+        "php": "^7.3|^8.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "Codelabs\\SeoTitle\\": "src/"
+        }
+    },
+    "extra": {
+        "laravel": {
+            "providers": [
+                "Codelabs\\SeoTitle\\FieldServiceProvider"
+            ]
+        }
+    },
+    "config": {
+        "sort-packages": true
+    },
+    "minimum-stability": "dev",
+    "prefer-stable": true
+}

dist/css/field.css

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+

dist/js/field.js.LICENSE.txt

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+/*!
+ * vuex v4.0.2
+ * (c) 2021 Evan You
+ * @license MIT
+ */

dist/mix-manifest.json

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+{
+    "/js/field.js": "/js/field.js",
+    "/css/field.css": "/css/field.css"
+}

mix.js

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+const mix = require('laravel-mix')
+const webpack = require('webpack')
+const path = require('path')
+
+class NovaExtension {
+  name() {
+    return 'nova-extension'
+  }
+
+  register(name) {
+    this.name = name
+  }
+
+  webpackPlugins() {
+    return new webpack.ProvidePlugin({
+      _: 'lodash',
+      Errors: 'form-backend-validation',
+    })
+  }
+
+  webpackConfig(webpackConfig) {
+    webpackConfig.externals = {
+      vue: 'Vue',
+    }
+
+    webpackConfig.resolve.alias = {
+      ...(webpackConfig.resolve.alias || {}),
+      'laravel-nova': path.join(
+        __dirname,
+        '../../vendor/laravel/nova/resources/js/mixins/packages.js'
+      ),
+    }
+
+    webpackConfig.output = {
+      uniqueName: this.name,
+    }
+  }
+}
+
+mix.extend('nova', new NovaExtension())

package.json

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+{
+  "private": true,
+  "scripts": {
+    "dev": "npm run development",
+    "development": "mix",
+    "watch": "mix watch",
+    "watch-poll": "mix watch -- --watch-options-poll=1000",
+    "hot": "mix watch --hot",
+    "prod": "npm run production",
+    "production": "mix --production"
+  },
+  "devDependencies": {
+    "@vue/compiler-sfc": "^3.2.22",
+    "form-backend-validation": "^2.3.3",
+    "laravel-mix": "^6.0.41",
+    "lodash": "^4.17.21",
+    "postcss": "^8.3.11",
+    "vue-loader": "^16.8.3"
+  },
+  "dependencies": {
+    "vuex": "^4.0.2"
+  }
+}

resources/css/field.css

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+/* Nova Field CSS */

resources/js/components/DetailField.vue

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+<template>
+  <PanelItem :index="index" :field="field" />
+</template>
+
+<script>
+export default {
+  props: ['index', 'resource', 'resourceName', 'resourceId', 'field'],
+}
+</script>

resources/js/components/FormField.vue

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+<template>
+  <DefaultField :field="field" :errors="errors" :show-help-text="showHelpText">
+    <template #field>
+      <input
+        :id="field.attribute"
+        @input="handleChange"
+        type="text"
+        class="w-full form-control form-input form-input-bordered"
+        :class="errorClasses"
+        :placeholder="field.name"
+        v-model="value"
+      />
+      <p
+        class="mt-2 help-text"
+        :class="isInRange ? 'text-green-600' : 'text-red-500'"
+      >{{ isInRange ? 'This title is good for SEO. Great work!' : `You're out of ${overChars} characters. Please make a better title!` }}</p>
+    </template>
+  </DefaultField>
+</template>
+
+<script>
+import { FormField, HandlesValidationErrors } from 'laravel-nova'
+
+export default {
+  mixins: [FormField, HandlesValidationErrors],
+
+  props: ['resourceName', 'resourceId', 'field', 'min', 'max'],
+
+  computed: {
+
+    isInRange() {
+      return this.value.length >= this.field.min && this.value.length <= this.field.max
+    },
+
+    overChars() {
+      if (this.value.length > this.field.max) {
+        return this.value.length - this.field.max
+      } else if (this.value.length < this.field.min) {
+        return this.field.min - this.value.length;
+      }
+    }
+
+  },
+
+  mounted() {
+    //console.log(typeof (this.field.max))
+  },
+
+  methods: {
+    /*
+     * Set the initial, internal value for the field.
+     */
+    setInitialValue() {
+      this.value = this.field.value || ''
+    },
+
+    /**
+     * Fill the given FormData object with the field's internal value.
+     */
+    fill(formData) {
+      formData.append(this.field.attribute, this.value || '')
+    },
+  },
+}
+</script>

resources/js/components/IndexField.vue

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+<template>
+    <span>
+        <div
+            class="inline-block w-2 h-2 rounded-full opacity-75"
+            :class="isInRange ? 'bg-green-500' : 'bg-red-500'"
+            :title="isInRange ? 'This title is good for SEO. Great work!' : `You're out of ${overChars} characters. Please make a better title!`"
+        ></div>
+        {{ field.value }}
+    </span>
+</template>
+
+<script>
+export default {
+    props: ['resourceName', 'field', 'min', 'max'],
+    computed: {
+        isInRange() {
+            return this.field.value.length >= this.field.min && this.field.value.length <= this.field.max
+        }
+    }
+}
+</script>

resources/js/field.js

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+import IndexField from './components/IndexField'
+import DetailField from './components/DetailField'
+import FormField from './components/FormField'
+
+Nova.booting((app, store) => {
+  app.component('index-seo-title', IndexField)
+  app.component('detail-seo-title', DetailField)
+  app.component('form-seo-title', FormField)
+})

src/FieldServiceProvider.php

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+<?php
+
+namespace Codelabs\SeoTitle;
+
+use Illuminate\Support\ServiceProvider;
+use Laravel\Nova\Events\ServingNova;
+use Laravel\Nova\Nova;
+
+class FieldServiceProvider extends ServiceProvider
+{
+    /**
+     * Bootstrap any application services.
+     *
+     * @return void
+     */
+    public function boot()
+    {
+        Nova::serving(function (ServingNova $event) {
+            Nova::script('seo-title', __DIR__.'/../dist/js/field.js');
+            Nova::style('seo-title', __DIR__.'/../dist/css/field.css');
+        });
+    }
+
+    /**
+     * Register any application services.
+     *
+     * @return void
+     */
+    public function register()
+    {
+        //
+    }
+}

src/SeoTitle.php

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+<?php
+
+namespace Codelabs\SeoTitle;
+
+use Laravel\Nova\Fields\Field;
+
+class SeoTitle extends Field
+{
+    /**
+     * The field's component.
+     *
+     * @var string
+     */
+    public $component = 'seo-title';
+
+    /**
+     * Set the range of acceptable string length.
+     *
+     * @param  int  $min
+     * @param int $max
+     * @return $this
+     */
+    public function rangeLength(int $min = 30, int $max = 60) : self
+    {
+        return $this->withMeta([
+            'min' => $min,
+            'max' => $max,
+        ]);
+    }
+}

webpack.mix.js

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+let mix = require('laravel-mix')
+let path = require('path')
+
+require('./mix')
+
+mix
+  .setPublicPath('dist')
+  .js('resources/js/field.js', 'js')
+  .vue({ version: 3 })
+  .css('resources/css/field.css', 'css')
+  .nova('codelabs/seo-title')