# All files / js/components EmailTemplateUnlayerEditor.vue

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     <script setup lang="ts">
    import { getCsrfToken } from '@/lib/csrf';
    import { computed, defineAsyncComponent, onMounted, ref, watch } from 'vue';

    type UnlayerDesign = Record<string, unknown>;

    interface UnlayerExportData {
        design: UnlayerDesign;
        html: string;
    }

    interface UnlayerEditorInstance {
        loadDesign: (design: UnlayerDesign) => void;
        exportHtml: (callback: (data: UnlayerExportData) => void) => void;
        addEventListener: (event: string, callback: () => void) => void;
        registerCallback?: (event: string, callback: (file: unknown, done: (result: unknown) => void) => void) => void;
    }

    interface UnlayerEditorRef {
        editor: UnlayerEditorInstance;
    }

    const EmailEditor = defineAsyncComponent({
        loader: async () => {
            const module = await import('vue-email-editor');
            return (module as { default?: unknown; EmailEditor?: unknown }).default
                ?? (module as { default?: unknown; EmailEditor?: unknown }).EmailEditor
                ?? module;
        },
        suspensible: false,
    });

    const DESIGN_MARKER_PREFIX = '<!-- unlayer-design:';
    const DESIGN_MARKER_SUFFIX = ' -->';

    const props = defineProps<{
        modelValue: string;
        imageUploadUrl?: string;
    }>();

    const emit = defineEmits<{
        (event: 'update:modelValue', value: string): void;
    }>();

    const isClient = ref(false);
    const activeTab = ref<'designer' | 'html'>('designer');
    const emailEditorRef = ref<UnlayerEditorRef | null>(null);
    const isReady = ref(false);
    const editorLoadError = ref(false);
    const manualHtml = ref('');
    const pendingDesign = ref<UnlayerDesign | null>(null);

    const uploadUrl = computed(() => props.imageUploadUrl || '/administration/email-templates/upload-image');

    const wrapWithDesignMarker = (design: UnlayerDesign, html: string) => {
        const encoded = encodeURIComponent(JSON.stringify(design));
        return `${DESIGN_MARKER_PREFIX}${encoded}${DESIGN_MARKER_SUFFIX}\n${html}`;
    };

    const unwrapDesignMarker = (input: string) => {
        if (!input?.startsWith(DESIGN_MARKER_PREFIX)) {
            return { design: null as UnlayerDesign | null, html: input || '' };
        }

        const endIndex = input.indexOf(DESIGN_MARKER_SUFFIX);
        if (endIndex === -1) {
            return { design: null as UnlayerDesign | null, html: input || '' };
        }

        const encoded = input.slice(DESIGN_MARKER_PREFIX.length, endIndex).trim();
        const html = input.slice(endIndex + DESIGN_MARKER_SUFFIX.length).replace(/^\n/, '');

        try {
            const decoded = decodeURIComponent(encoded);
            return {
                design: JSON.parse(decoded) as UnlayerDesign,
                html,
            };
        } catch {
            return { design: null as UnlayerDesign | null, html: input || '' };
        }
    };

    const syncFromEditor = () => {
        const editor = emailEditorRef.value?.editor;
        if (!editor || !isReady.value) {
            return;
        }

        editor.exportHtml((data) => {
            manualHtml.value = data.html || '';
            emit('update:modelValue', wrapWithDesignMarker(data.design || {}, data.html || ''));
        });
    };

    const findFile = (payload: unknown): File | null => {
        if (!payload || typeof payload !== 'object') {
            return null;
        }

        const direct = (payload as { file?: File }).file;
        if (direct instanceof File) {
            return direct;
        }

        const attachments = (payload as { attachments?: unknown[] }).attachments;
        if (Array.isArray(attachments)) {
            const first = attachments.find((item) => item instanceof File);
            if (first instanceof File) {
                return first;
            }
        }

        return null;
    };

    const registerImageUpload = () => {
        const editor = emailEditorRef.value?.editor;
        if (!editor?.registerCallback) {
            return;
        }

        editor.registerCallback('image', async (payload: unknown, done: (result: unknown) => void) => {
            const imageFile = findFile(payload);
            if (!imageFile) {
                done({ progress: 100, url: '' });
                return;
            }

            try {
                const formData = new FormData();
                formData.append('image', imageFile);

                const response = await fetch(uploadUrl.value, {
                    method: 'POST',
                    headers: {
                        'X-CSRF-TOKEN': getCsrfToken(),
                        'X-Requested-With': 'XMLHttpRequest',
                    },
                    body: formData,
                });

                const data = await response.json();
                const src = data?.data?.[0]?.src || '';
                done({ progress: 100, url: src });
            } catch {
                done({ progress: 100, url: '' });
            }
        });
    };

    const onEditorReady = () => {
        isReady.value = true;
        editorLoadError.value = false;
        registerImageUpload();

        const editor = emailEditorRef.value?.editor;
        if (!editor) {
            return;
        }

        if (pendingDesign.value) {
            editor.loadDesign(pendingDesign.value);
        }

        editor.addEventListener('design:updated', () => {
            syncFromEditor();
        });
    };

    watch(
        () => props.modelValue,
        (newValue) => {
            const parsed = unwrapDesignMarker(newValue || '');
            pendingDesign.value = parsed.design;
            manualHtml.value = parsed.html;

            // Keep designer in sync when modelValue changes after initial mount
            const editor = emailEditorRef.value?.editor;
            if (isReady.value && editor && parsed.design) {
                editor.loadDesign(parsed.design);
            }
        },
        { immediate: true },
    );

    watch(
        () => manualHtml.value,
        (newHtml) => {
            if (activeTab.value === 'html') {
                emit('update:modelValue', newHtml || '');
            }
        },
    );

    onMounted(() => {
        isClient.value = true;
    });
    </script>

    <template>
        <div class="space-y-3">
            <div class="flex items-center gap-2">
                <button
                    type="button"
                    @click="activeTab = 'designer'"
                    :class="[
                        'rounded-md px-3 py-1.5 text-xs font-medium',
                        activeTab === 'designer' ? 'bg-blue-600 text-white' : 'border border-gray-300 bg-white text-gray-700',
                    ]"
                >
                    Designer
                </button>
                <button
                    type="button"
                    @click="activeTab = 'html'"
                    :class="[
                        'rounded-md px-3 py-1.5 text-xs font-medium',
                        activeTab === 'html' ? 'bg-blue-600 text-white' : 'border border-gray-300 bg-white text-gray-700',
                    ]"
                >
                    Manual HTML
                </button>
                <button
                    v-if="activeTab === 'designer'"
                    type="button"
                    @click="syncFromEditor"
                    class="rounded-md border border-gray-300 bg-white px-3 py-1.5 text-xs font-medium text-gray-700 hover:bg-gray-50"
                >
                    Sync Designer HTML
                </button>
            </div>

            <div v-if="activeTab === 'designer'" class="h-[680px] overflow-hidden rounded-md border border-gray-200">
                <component
                    :is="EmailEditor"
                    v-if="isClient && !editorLoadError"
                    ref="emailEditorRef"
                    :min-height="680"
                    class="h-full"
                    @load="onEditorReady"
                    @ready="onEditorReady"
                    @error="editorLoadError = true"
                />
                <div v-else-if="!isClient" class="flex h-[680px] items-center justify-center text-sm text-gray-500">Loading editor...</div>
                <div v-else class="flex h-[680px] flex-col items-center justify-center gap-2 p-6 text-center text-sm text-gray-600">
                    <p>Email designer failed to load.</p>
                    <p class="text-xs text-gray-500">You can continue using the Manual HTML tab while we retry.</p>
                </div>
            </div>

            <div v-else>
                <textarea
                    v-model="manualHtml"
                    rows="24"
                    class="w-full rounded-md border-gray-300 font-mono text-sm shadow-sm focus:border-blue-500 focus:ring-blue-500"
                    placeholder="<p>Write your email HTML here...</p>"
                ></textarea>
            </div>
        </div>
    </template>