Mejik Modal Form - reusable modal form

<!-- MejikModalForm.vue -->
<template>
  <!-- We don't render anything directly. The b-modal is the component's entire visible structure. -->
  <b-modal
    :id="modalId"
    :title="title"
    v-bind="$attrs"
    no-close-on-backdrop
    @show="handleShow"
    @hidden="handleHidden"
    v-on="$listeners"
  >
    <!-- Loading Overlay -->
    <b-overlay :show="isLoading" rounded="sm">
      <!-- Scoped Slot for the form layout -->
      <slot
        name="form"
        :form-object="formObject"
        :form-mode="currentMode"
        :save-item="saveItem"
        :form-params="internalParams"
        :reset-form="resetForm"
      ></slot>
    </b-overlay>

    <!-- Custom Footer for dynamic actions -->
    <template #modal-footer>
      <button class="btn btn-secondary" @click="hide">Cancel</button>

      <!-- Show "Edit" button in 'view' mode if canEdit is true -->
      <button
        v-if="currentMode === 'view' && canEdit"
        class="btn btn-info"
        @click="switchToEditMode"
      >
        <i class="las la-pencil-alt"></i> Edit
      </button>

      <!-- Show "Save" button in 'add' or 'edit' mode -->
      <button
        v-if="(currentMode === 'add' && canAdd) || (currentMode === 'edit' && canEdit)"
        class="btn btn-primary"
        :disabled="isLoading"
        @click="saveItem"
      >
        <b-spinner v-if="isLoading" small></b-spinner>
        <i v-else class="las la-save"></i>
        Save
      </button>
    </template>
  </b-modal>
</template>

<script>
import _ from 'lodash';

export default {
  name: "MejikModalForm",
  // Inherit attributes like 'size', 'centered', etc., and pass them to b-modal
  inheritAttrs: false,
  props: {
    // --- Behavior & Mode ---
    mode: {
      type: String,
      default: 'add',
      validator: (value) => ['add', 'edit', 'view'].includes(value),
    },
    // --- Data & Defaults ---
    objectDefault: {
      type: Object,
      default: () => ({}),
    },
    // --- ACL ---
    canAdd: { type: Boolean, default: true },
    canEdit: { type: Boolean, default: true },
    canView: { type: Boolean, default: true },
    // canUpload prop is not directly used here but kept for consistency if needed later
    canUpload: { type: Boolean, default: false },
    // --- Validation ---
    validator: {
      type: Function,
      default: null, // Should be an async function: async () => boolean
    },
    // --- Parameters ---
    params: {
      type: [Object, Array],
      default: () => ({}),
    },
    // --- API URLs ---
    urls: {
      type: Object,
      default: () => ({
        add: '',
        edit: '', // Should be the base URL, e.g., '/api/items'
        view: '', // Should be the base URL, e.g., '/api/items'
        param: '',
      }),
    },
    // --- Customization ---
    titlePrefix: {
      type: String,
      default: 'Item'
    },
    // Key to get the unique ID from the data object
    uniqueKey: {
        type: String,
        default: 'id'
    }
  },
  data() {
    return {
      modalId: `mejik-modal-form-${this._uid}`,
      isLoading: false,
      currentMode: 'add',
      currentId: null,
      formObject: {},
      initialFormObject: {}, // For reset functionality
      internalParams: {},
    };
  },
  computed: {
    title() {
      // Creates a dynamic title like "Add New Item", "Edit Item", "View Item Details"
      const modeText = {
        add: 'Add New',
        edit: 'Edit',
        view: 'View Details of'
      }[this.currentMode];
      return `${modeText} ${this.titlePrefix}`;
    },
  },
  methods: {
    // --- Public Methods (to be called via $refs) ---

    /**
     * Public method to open the modal.
     * @param {object} options - Configuration for the modal opening.
     * @param {string} options.mode - 'add', 'edit', or 'view'.
     * @param {any} [options.id=null] - The ID of the item for 'edit' or 'view' mode.
     */
    show({ mode, id = null }) {
      if (!this.canView && (mode === 'edit' || mode === 'view')) {
          console.warn("MejikModalForm: Insufficient permissions to view or edit.");
          return;
      }
      if (!this.canAdd && mode === 'add') {
          console.warn("MejikModalForm: Insufficient permissions to add.");
          return;
      }

      this.currentMode = mode;
      this.currentId = id;
      this.$bvModal.show(this.modalId);
    },

    hide() {
      this.$bvModal.hide(this.modalId);
    },

    // --- Internal Event Handlers ---

    // Fired when the modal begins to show. Good place to load data.
    async handleShow() {
      this.isLoading = true;
      try {
        // 1. Load additional parameters if URL is provided
        if (this.urls.param) {
          const res = await window.axios.get(this.urls.param);
          this.internalParams = res.data;
        } else {
          this.internalParams = _.cloneDeep(this.params);
        }

        // 2. Load main form object based on mode
        if (this.currentMode === 'add') {
          this.formObject = _.cloneDeep(this.objectDefault);
        } else if (this.currentId && (this.currentMode === 'edit' || this.currentMode === 'view')) {
          if (!this.urls.view) {
             console.error("MejikModalForm: `urls.view` prop is required for 'edit' or 'view' mode.");
             this.hide();
             return;
          }
          const res = await window.axios.get(`${this.urls.view}/${this.currentId}`);
          this.formObject = res.data;
        }

        // Store the initial state for the reset functionality
        this.initialFormObject = _.cloneDeep(this.formObject);

      } catch (error) {
        console.error("MejikModalForm: Error loading data.", error);
        this.$emit('error', { type: 'load', error });
        this.hide(); // Close modal on data load failure
      } finally {
        this.isLoading = false;
      }
    },

    // Fired when the modal is completely hidden. Good place for cleanup.
    handleHidden() {
      this.formObject = {};
      this.initialFormObject = {};
      this.currentId = null;
      this.isLoading = false;
      this.internalParams = {};
    },

    // --- Form Actions (passed to slot) ---

    async saveItem() {
      // 1. External Validation
      if (this.validator) {
        const isValid = await this.validator(this.formObject);
        if (!isValid) {
          this.$emit('validation-failed');
          return;
        }
      }

      this.isLoading = true;
      try {
        let response;
        if (this.currentMode === 'add') {
          if (!this.urls.add) throw new Error("`urls.add` prop is not defined.");
          response = await window.axios.post(this.urls.add, this.formObject);
        } else { // 'edit' mode
          const editUrl = this.urls.edit || this.urls.add; // Fallback to add url
          if (!editUrl) throw new Error("`urls.edit` or `urls.add` prop is not defined for editing.");
          const id = this.currentId || this.formObject[this.uniqueKey];
          response = await window.axios.put(`${editUrl}/${id}`, this.formObject);
        }

        this.$emit('saved', { mode: this.currentMode, data: response.data });
        this.hide();

      } catch (error) {
        console.error("MejikModalForm: Error saving data.", error);
        this.$emit('error', { type: 'save', error });
      } finally {
        this.isLoading = false;
      }
    },

    resetForm() {
      this.formObject = _.cloneDeep(this.initialFormObject);
    },

    // --- Mode Switching ---
    switchToEditMode() {
        if (this.canEdit) {
            this.currentMode = 'edit';
        }
    }
  },
};
</script>

<!-- UserManagementPage.vue -->
<template>
  <div>
    <h3>User Management</h3>
    <button class="btn btn-primary mb-3" @click="openAddUserModal">
      <i class="las la-plus"></i> Add New User
    </button>

    <!-- User List Table -->
    <table class="table">
      <thead>
        <tr>
          <th>ID</th>
          <th>Name</th>
          <th>Email</th>
          <th>Actions</th>
        </tr>
      </thead>
      <tbody>
        <tr v-for="user in users" :key="user.id">
          <td>{{ user.id }}</td>
          <td>{{ user.name }}</td>
          <td>{{ user.email }}</td>
          <td>
            <button class="btn btn-sm btn-icon" @click="openViewUserModal(user.id)" title="View">
              <i class="las la-eye"></i>
            </button>
            <button class="btn btn-sm btn-icon" @click="openEditUserModal(user.id)" title="Edit">
              <i class="las la-pencil-alt"></i>
            </button>
          </td>
        </tr>
      </tbody>
    </table>

    <!-- The MejikModalForm Component Instance -->
    <MejikModalForm
      ref="userModal"
      :urls="userApiUrls"
      :object-default="defaultUser"
      :params="formParams"
      :validator="validateForm"
      title-prefix="User"
      size="lg"
      @saved="onUserSaved"
    >
      <!-- Define the actual form layout using the scoped slot -->
      <template #form="{ formObject }">
        <div class="form-group">
          <label for="userName">Name</label>
          <input type="text" id="userName" v-model="formObject.name" class="form-control" />
        </div>
        <div class="form-group">
          <label for="userEmail">Email</label>
          <input type="email" id="userEmail" v-model="formObject.email" class="form-control" />
        </div>
        <div class="form-group">
          <label for="userRole">Role</label>
          <select id="userRole" v-model="formObject.roleId" class="form-control">
             <!-- `formParams` comes from the slot and was loaded via `paramUrl` -->
            <option v-for="role in formParams.roles" :key="role.id" :value="role.id">
              {{ role.name }}
            </option>
          </select>
        </div>
      </template>
    </MejikModalForm>
  </div>
</template>

<script>
import MejikModalForm from './MejikModalForm.vue';

export default {
  components: { MejikModalForm },
  data() {
    return {
      users: [
        // This would typically be loaded from an API
        { id: 1, name: 'John Doe', email: '[email protected]', roleId: 1 },
        { id: 2, name: 'Jane Smith', email: '[email protected]', roleId: 2 },
      ],
      // Configuration for the modal
      userApiUrls: {
        add: '/api/users',
        edit: '/api/users', // Base URL for PUT /api/users/{id}
        view: '/api/users', // Base URL for GET /api/users/{id}
        param: '/api/form-params/user-roles', // URL to fetch roles
      },
      defaultUser: {
        name: '',
        email: '',
        roleId: null,
      },
    };
  },
  computed: {
    // This is just for the example to show params being passed.
    // In a real app, the modal fetches this itself via `paramUrl`.
    formParams() {
        return {
            roles: [
                { id: 1, name: 'Admin' },
                { id: 2, name: 'Editor' },
                { id: 3, name: 'Viewer' },
            ]
        }
    }
  },
  methods: {
    // --- Modal Triggers ---
    openAddUserModal() {
      this.$refs.userModal.show({ mode: 'add' });
    },
    openEditUserModal(userId) {
      this.$refs.userModal.show({ mode: 'edit', id: userId });
    },
    openViewUserModal(userId) {
      this.$refs.userModal.show({ mode: 'view', id: userId });
    },

    // --- Event Handler ---
    onUserSaved({ mode, data }) {
      console.log(`User was ${mode === 'add' ? 'added' : 'updated'}!`, data);
      // Here you would refresh your user list
      this.fetchUsers();
    },

    // --- Validation (Example) ---
    async validateForm(formObject) {
      // This is a placeholder for a real validation library like VeeValidate or Vuelidate
      if (!formObject.name || !formObject.email) {
        alert('Name and Email are required!');
        return false;
      }
      return true;
    },

    fetchUsers() {
        console.log("Refreshing user list...");
        // axios.get('/api/users').then(res => this.users = res.data);
    }
  },
};
</script>

<!-- ParentComponent.vue -->
<MejikModalForm
  ref="journalModal"
  :urls="apiUrls"
  :validator="validateEntryDetailForm"  <!-- Pass the method here -->
  @saved="refreshData"
>
  <template #form="{ formObject, formParams }">
    <!-- 1. Add the observer with a ref -->
    <validation-observer ref="journalEntryDetailsFormObserver">

      <!-- Your form fields go here, wrapped in ValidationProviders -->
      <div class="form-group">
        <label>Account</label>
        <validation-provider name="Account" rules="required" v-slot="{ errors }">
          <select-advanced-dialog
            v-model="formObject.accountNumber"
            url="/api/accounts/option"
          ></select-advanced-dialog>
          <small class="text-danger">{{ errors[0] }}</small>
        </validation-provider>
      </div>

      <div class="form-group">
        <label>Amount</label>
        <validation-provider name="Amount" rules="required|min_value:1" v-slot="{ errors }">
          <currency-input
              class="form-control"
              v-model="formObject.totalCost"
          />
          <small class="text-danger">{{ errors[0] }}</small>
        </validation-provider>
      </div>

       <div class="form-group">
        <label>DR/CR</label>
        <validation-provider name="DR/CR" rules="required" v-slot="{ errors }">
            <b-form-select
                v-model="formObject.drcr"
                :options="formParams.drcr"
            ></b-form-select>
            <small class="text-danger">{{ errors[0] }}</small>
        </validation-provider>
      </div>

    </validation-observer>
  </template>
</MejikModalForm>

// ParentComponent.vue -> <script>
import MejikModalForm from './MejikModalForm.vue';
// Make sure you have VeeValidate components registered globally or locally
import { ValidationObserver, ValidationProvider } from 'vee-validate';

export default {
  components: {
    MejikModalForm,
    ValidationObserver,
    ValidationProvider
  },
  methods: {
    // 2. Define the validator method
    async validateEntryDetailForm() {
      // The ref only exists when the modal is open and its slot is rendered.
      // This check prevents errors if the method is ever called at the wrong time.
      if (this.$refs.journalEntryDetailsFormObserver) {
        // observer.validate() returns a promise that resolves to a boolean
        return this.$refs.journalEntryDetailsFormObserver.validate();
      }
      // If for some reason the observer isn't there, we can't validate.
      // Returning false is the safest default to prevent invalid submissions.
      return false;
    },

    openAddModal() {
      // Use the ref on the MejikModalForm itself to call its public show() method
      this.$refs.journalModal.show({ mode: 'add' });
    },

    refreshData(){
        console.log('Form was saved, now refreshing my data grid...');
    }
  }
}