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November 2, 2023 20:18
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Keep your app, Webflow, SQLite, and Algolia in sync...
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/* | |
Permission is hereby granted, free of charge, to any person obtaining a copy of this | |
software and associated documentation files (the "Software"), to deal in the Software | |
without restriction, including without limitation the rights to use, copy, modify, merge, | |
publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons | |
to whom the Software is furnished to do so, subject to the following conditions: | |
The above copyright notice and this permission notice shall be included in all copies or | |
substantial portions of the Software. | |
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING | |
BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, | |
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
*/ | |
// Global variables and imports | |
const express = require("express"); | |
const algoliasearch = require("algoliasearch"); | |
const axios = require("axios"); | |
const Webflow = require("webflow-api"); | |
const router = express.Router(); | |
const Bottleneck = require("bottleneck"); | |
const NodeCache = require("node-cache"); | |
// setup Bottleneck to limit API calls to 1 per second (60RPM) | |
const limiter = new Bottleneck({ | |
minTime: 1000, | |
}); | |
// initialize Webflow API client | |
const webflow = new Webflow({ | |
token: process.env.WEBFLOW_API_TOKEN, | |
}); | |
// Set the ID for the multi-reference field that holds categories | |
const categoriesCollectionId = process.env.CATEGORIES_COLLECTION_ID; | |
// setup NodeCache to cache categories for 10 minutes | |
const myCache = new NodeCache({ stdTTL: 600, checkperiod: 600 }); | |
// fetch categories from Webflow | |
async function fetchCategories() { | |
// check if categories are cached | |
let categories = myCache.get("categories"); | |
if (categories) { | |
console.log("Using cached categories"); | |
} else { | |
const webflowLimit = 100; | |
let currentOffset = 0; | |
categories = []; | |
console.log("No cached categories, fetching from Webflow"); | |
// Fetch categories from Webflow | |
// loop through all categories | |
while (true) { | |
try { | |
const fetchedCategories = await limiter.schedule(() => | |
webflow.get( | |
`/collections/${categoriesCollectionId}/items?limit=${webflowLimit}&offset=${currentOffset}` | |
) | |
); | |
if (!fetchedCategories.data.items) { | |
console.error("fetchedCategories.data.items is undefined!"); | |
} | |
categories = categories.concat(fetchedCategories.data.items); | |
if (fetchedCategories.data.items.length < webflowLimit) { | |
break; | |
} | |
currentOffset += webflowLimit; | |
console.log( | |
"Fetching more categories from Webflow at offset", | |
currentOffset | |
); | |
} catch (error) { | |
console.error("Webflow API error:", error); | |
} | |
} | |
// transform categories into a map | |
const categoriesMap = transformCategories(categories); | |
console.log("Categories fetched from Webflow"); | |
myCache.set("categories", categoriesMap); | |
categories = categoriesMap; | |
} | |
return categories; | |
} | |
// function to transform categories into a map | |
const transformCategories = (categories) => { | |
return categories.reduce((map, category) => { | |
map[category._id] = category.name; | |
return map; | |
}, {}); | |
}; | |
// initialize Algolia client | |
const client = algoliasearch( | |
process.env.ALGOLIA_APP_ID, | |
process.env.ALGOLIA_API_KEY | |
); | |
const index = client.initIndex("posts"); | |
// Webhook endpoint | |
router.post("/webhook-endpoint", async (req, res) => { | |
try { | |
console.log("Event received"); | |
const data = req.body; | |
// Common SOUL endpoints | |
const soulApiBaseUrl = "http://your-soul-api-url"; // Replace with your SOUL API base URL | |
const itemsEndpoint = `${soulApiBaseUrl}/items`; | |
// if the event is a delete event, delete the object from Algolia | |
if (data.deleted) { | |
console.log("This is a delete event"); | |
console.log(`Deleting object ${data.itemId} from Algolia`); | |
index | |
.deleteObject(data.itemId) | |
.then(() => { | |
console.log(`Deleted object ${data.itemId} from Algolia`); | |
res.status(200).send("OK"); | |
}) | |
.catch((err) => { | |
console.error("Error deleting object from Algolia: ", err); | |
res.status(500).send("Error"); | |
}); | |
// Delete item from SQLite via SOUL | |
await axios | |
.delete(`${itemsEndpoint}/${data.itemId}`) | |
.then((response) => { | |
console.log(`Deleted item ${data.itemId} from SQLite`); | |
}) | |
.catch((error) => { | |
console.error("SOUL API error:", error); | |
}); | |
} | |
// if the event is creating or updating an item in my specific collection | |
// fetch categories from Webflow and save the object to Algolia and SQLite | |
else if (data._cid === process.env.COLLECTION_ID) { | |
console.log("This is a create or update event"); | |
// fetch categories from Webflow | |
const categoriesMap = await fetchCategories(); | |
const categories = data.categories | |
? data.categories.map((id) => categoriesMap[id]) | |
: []; | |
// create object to save to Algolia | |
const objectToUpdate = { | |
objectID: data._id, | |
name: data.name, | |
slug: data.slug, | |
summary: data["post-summary"], | |
categories: categories, | |
image: data["main-image"] ? data["main-image"].url : null, | |
}; | |
console.log( | |
`Saving object to Algolia: ${JSON.stringify(objectToUpdate)}` | |
); | |
// save object to Algolia | |
index | |
.saveObject(objectToUpdate) | |
.then(({ objectID }) => { | |
console.log(`Saved object ${objectID} to Algolia`); | |
res.status(200).send("OK"); | |
}) | |
.catch((err) => { | |
console.error("Error saving object to Algolia: ", err); | |
res.status(500).send("Error"); | |
}); | |
// Prepare data for SQLite via SOUL | |
const itemData = { | |
id: data._id, | |
name: data.name, | |
slug: data.slug, | |
summary: data["post-summary"], | |
categories: JSON.stringify(categories), | |
image: data["main-image"] ? data["main-image"].url : null, | |
}; | |
// Check if item already exists in SQLite via SOUL | |
axios | |
.get(`${itemsEndpoint}/${data._id}`) | |
.then(async (response) => { | |
if (response.data) { | |
// Update item in SQLite via SOUL | |
await axios | |
.put(`${itemsEndpoint}/${data._id}`, itemData) | |
.then((response) => { | |
console.log(`Updated item ${data._id} in SQLite`); | |
}) | |
.catch((error) => { | |
console.error("SOUL API error:", error); | |
}); | |
} else { | |
// Insert item into SQLite via SOUL | |
await axios | |
.post(itemsEndpoint, itemData) | |
.then((response) => { | |
console.log(`Inserted item ${data._id} into SQLite`); | |
}) | |
.catch((error) => { | |
console.error("SOUL API error:", error); | |
}); | |
} | |
}) | |
.catch((error) => { | |
console.error("SOUL API error:", error); | |
}); | |
} else { | |
// if the event is creating or updating an | |
// item in a different collection do nothing | |
console.log("Do nothing, this is not the Articles collection"); | |
} | |
} catch (error) { | |
console.error("Error in /webhook-endpoint: ", error); | |
res.status(500).send("Internal server error"); | |
} | |
}); | |
module.exports = router; |
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