The workflow JSON
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{
"nodes": [
{
"parameters": {
"httpMethod": "POST",
"path": "gen-slide",
"options": {}
},
"id": "slide-webhook-id",
"name": "Webhook Slide",
"type": "n8n-nodes-base.webhook",
"typeVersion": 2,
"position": [
1500,
200
]
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "cfg-api-domain",
"name": "api_domain",
"value": "https://9router.n8n71.com/v1",
"type": "string"
},
{
"id": "cfg-lms-domain",
"name": "lms_domain",
"value": "https://lms.n8n71.com",
"type": "string"
},
{
"id": "cfg-key",
"name": "api_key",
"value": "",
"type": "string"
},
{
"id": "cfg-model",
"name": "model",
"value": "tesstm3",
"type": "string"
},
{
"id": "cfg-gamma-key",
"name": "gamma_api_key",
"value": "",
"type": "string"
},
{
"id": "cfg-gamma-theme",
"name": "gamma_theme_id",
"value": "",
"type": "string"
}
]
},
"options": {}
},
"id": "slide-setup-config-id",
"name": "Setup Config",
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
1720,
200
]
},
{
"parameters": {
"jsCode": "return $input.all().map(item => {\n const p = item.json.body || {};\n const lesson = p.lesson || {};\n const session = p.session || {};\n const doc = String(p.document || '').replace(/<[^>]+>/g, ' ').replace(/\\s+/g, ' ').trim();\n\n const systemPrompt = [\n 'B\u1ea1n l\u00e0 chuy\u00ean gia thi\u1ebft k\u1ebf b\u00e0i gi\u1ea3ng (Instructional Designer) cho h\u1ecdc sinh K-12 h\u1ecdc l\u1eadp tr\u00ecnh.',\n 'D\u1ef1a tr\u00ean n\u1ed9i dung t\u00e0i li\u1ec7u b\u00e0i h\u1ecdc, h\u00e3y vi\u1ebft d\u00e0n \u00fd cho m\u1ed9t b\u00e0i slide thuy\u1ebft tr\u00ecnh kho\u1ea3ng 10-15 trang (card).',\n '',\n 'QUY T\u1eaeC B\u1eaeT BU\u1ed8C:',\n '- CH\u1ec8 tr\u1ea3 v\u1ec1 v\u0103n b\u1ea3n thu\u1ea7n (plain text), m\u1ed7i trang slide l\u00e0 m\u1ed9t \u0111o\u1ea1n ng\u1eafn b\u1eaft \u0111\u1ea7u b\u1eb1ng ti\u00eau \u0111\u1ec1 trang.',\n '- KH\u00d4NG d\u00f9ng markdown, KH\u00d4NG d\u00f9ng bullet, KH\u00d4NG icon, KH\u00d4NG gi\u1ea3i th\u00edch th\u00eam ngo\u00e0i n\u1ed9i dung d\u00e0n \u00fd.',\n '- V\u0103n phong ti\u1ebfng Vi\u1ec7t \u0111\u01a1n gi\u1ea3n, d\u1ec5 hi\u1ec3u, ph\u00f9 h\u1ee3p h\u1ecdc sinh ph\u1ed5 th\u00f4ng.'\n ].join('\\n');\n\n const userPrompt = `Ch\u01b0\u01a1ng: ${session.title || ''}\\nB\u00e0i h\u1ecdc: ${lesson.title || ''}\\nM\u00f4 t\u1ea3: ${lesson.description || ''}\\n\\nN\u1ed9i dung t\u00e0i li\u1ec7u b\u00e0i h\u1ecdc:\\n${doc.slice(0, 6000)}`;\n\n return { json: { systemPrompt, userPrompt, lesson_id: p.lesson_id, lesson_title: lesson.title || 'B\u00e0i h\u1ecdc' } };\n});"
},
"id": "slide-build-outline-prompt-id",
"name": "Build Outline Prompt",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
1940,
200
]
},
{
"parameters": {
"method": "POST",
"url": "={{ $('Setup Config').first().json.api_domain }}/chat/completions",
"sendHeaders": true,
"headerParameters": {
"parameters": [
{
"name": "Authorization",
"value": "=Bearer {{ $('Setup Config').first().json.api_key }}"
}
]
},
"sendBody": true,
"specifyBody": "json",
"jsonBody": "={{ JSON.stringify({ model: $('Setup Config').first().json.model, temperature: 0.5, messages: [ {role:'system', content: $json.systemPrompt}, {role:'user', content: $json.userPrompt} ] }) }}",
"options": {
"timeout": 120000
},
"retryOnFail": true,
"maxTries": 3,
"waitBetweenTries": 3000
},
"id": "slide-call-llm-outline-id",
"name": "Call LLM Outline",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
2160,
200
]
},
{
"parameters": {
"jsCode": "return $input.all().map(item => {\n const raw = item.json.choices?.[0]?.message?.content || '';\n const bo = $('Build Outline Prompt').first().json;\n return { json: {\n outlineText: raw.trim(),\n lesson_id: bo.lesson_id,\n lesson_title: bo.lesson_title\n } };\n});"
},
"id": "slide-prepare-gamma-input-id",
"name": "Prepare Gamma Input",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
2380,
200
]
},
{
"parameters": {
"method": "POST",
"url": "https://public-api.gamma.app/v1.0/generations",
"sendHeaders": true,
"headerParameters": {
"parameters": [
{
"name": "X-API-KEY",
"value": "={{ $('Setup Config').first().json.gamma_api_key }}"
}
]
},
"sendBody": true,
"specifyBody": "json",
"jsonBody": "={{ JSON.stringify({ inputText: $json.outlineText, textMode: 'generate', format: 'presentation', exportAs: 'pptx', cardSplit: 'auto', numCards: 15, themeId: $('Setup Config').first().json.gamma_theme_id, textOptions: { language: 'vi' } }) }}",
"options": {
"timeout": 60000
},
"retryOnFail": true,
"maxTries": 3,
"waitBetweenTries": 5000,
"onError": "continueErrorOutput"
},
"id": "slide-gamma-create-id",
"name": "Gamma Create Presentation",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
2600,
200
],
"disabled": true,
"notes": "T\u1eaeT M\u1eb6C \u0110\u1ecaNH: c\u1ea7n x\u00e1c nh\u1eadn l\u1ea1i t\u00ean header x\u00e1c th\u1ef1c ch\u00ednh x\u00e1c theo t\u00e0i li\u1ec7u API Gamma hi\u1ec7n h\u00e0nh tr\u01b0\u1edbc khi b\u1eadt, v\u00e0 \u0111i\u1ec1n gamma_api_key/gamma_theme_id \u1edf Setup Config. Trong workflow tham chi\u1ebfu g\u1ed1c (Step2_ALL.json) node Gamma n\u00e0y c\u0169ng \u0111ang \u1edf tr\u1ea1ng th\u00e1i disabled/th\u1eed nghi\u1ec7m, ch\u01b0a \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn ch\u1ea1y production."
},
{
"parameters": {
"resume": "timeInterval",
"amount": 15,
"unit": "seconds"
},
"id": "slide-wait-gamma-id",
"name": "Wait Gamma",
"type": "n8n-nodes-base.wait",
"typeVersion": 1.1,
"position": [
2600,
400
],
"disabled": true
},
{
"parameters": {
"method": "GET",
"url": "=https://public-api.gamma.app/v1.0/generations/{{ $('Gamma Create Presentation').first().json.generationId }}",
"sendHeaders": true,
"headerParameters": {
"parameters": [
{
"name": "X-API-KEY",
"value": "={{ $('Setup Config').first().json.gamma_api_key }}"
}
]
},
"options": {
"timeout": 30000
},
"retryOnFail": true,
"maxTries": 3,
"onError": "continueErrorOutput"
},
"id": "slide-gamma-check-id",
"name": "Gamma Check Status",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
2820,
400
],
"disabled": true
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "gamma-still-processing-1",
"leftValue": "={{ $json.status }}",
"rightValue": "completed",
"operator": {
"type": "string",
"operation": "notEquals"
}
},
{
"id": "gamma-still-processing-2",
"leftValue": "={{ $json.status }}",
"rightValue": "failed",
"operator": {
"type": "string",
"operation": "notEquals"
}
}
]
},
"options": {}
},
"id": "slide-if-gamma-completed-id",
"name": "If Gamma Still Processing",
"type": "n8n-nodes-base.if",
"typeVersion": 2,
"position": [
3040,
400
],
"disabled": true
},
{
"parameters": {
"jsCode": "return $input.all().map(item => {\n const g = item.json || {};\n const pgi = $('Prepare Gamma Input').first().json;\n\n const link_view = g.gammaUrl || null;\n const link_download = g.exportUrl || null;\n\n return { json: {\n lesson_id: pgi.lesson_id,\n link_view: link_view || 'CH\u01afA C\u1ea4U H\u00ccNH GAMMA API - vui l\u00f2ng b\u1eadt node Gamma v\u00e0 c\u1ea5u h\u00ecnh gamma_api_key/gamma_theme_id \u1edf Setup Config',\n link_download: link_download || ''\n } };\n});"
},
"id": "slide-build-payload-id",
"name": "Build Slide Payload",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
3260,
200
]
},
{
"parameters": {
"method": "PATCH",
"url": "={{ $('Setup Config').first().json.lms_domain }}/automation/lessons/{{ $json.lesson_id }}",
"sendBody": true,
"specifyBody": "json",
"jsonBody": "={{ JSON.stringify($json) }}",
"options": {
"allowUnauthorizedCerts": true,
"timeout": 30000
}
},
"id": "slide-patch-lms-id",
"name": "PATCH to LMS Slide",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
3480,
200
]
}
],
"connections": {
"Webhook Slide": {
"main": [
[
{
"node": "Setup Config",
"type": "main",
"index": 0
}
]
]
},
"Setup Config": {
"main": [
[
{
"node": "Build Outline Prompt",
"type": "main",
"index": 0
}
]
]
},
"Build Outline Prompt": {
"main": [
[
{
"node": "Call LLM Outline",
"type": "main",
"index": 0
}
]
]
},
"Call LLM Outline": {
"main": [
[
{
"node": "Prepare Gamma Input",
"type": "main",
"index": 0
}
]
]
},
"Prepare Gamma Input": {
"main": [
[
{
"node": "Gamma Create Presentation",
"type": "main",
"index": 0
}
]
]
},
"Gamma Create Presentation": {
"main": [
[
{
"node": "Wait Gamma",
"type": "main",
"index": 0
}
],
[
{
"node": "Build Slide Payload",
"type": "main",
"index": 0
}
]
]
},
"Wait Gamma": {
"main": [
[
{
"node": "Gamma Check Status",
"type": "main",
"index": 0
}
]
]
},
"Gamma Check Status": {
"main": [
[
{
"node": "If Gamma Still Processing",
"type": "main",
"index": 0
}
],
[
{
"node": "Build Slide Payload",
"type": "main",
"index": 0
}
]
]
},
"If Gamma Still Processing": {
"main": [
[
{
"node": "Wait Gamma",
"type": "main",
"index": 0
}
],
[
{
"node": "Build Slide Payload",
"type": "main",
"index": 0
}
]
]
},
"Build Slide Payload": {
"main": [
[
{
"node": "PATCH to LMS Slide",
"type": "main",
"index": 0
}
]
]
}
},
"settings": {
"executionTimeout": 900
}
}
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About this workflow
Gen Slide. Uses httpRequest. Webhook trigger; 11 nodes.
Source: https://github.com/DoanDuyThanh71/lmsv1/blob/b8627a2c443760d9b77fad30d6fc6eac76b41714/n8n_workflows/gen_slide.json — original creator credit. Request a take-down →
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