initial commit

.dockerignore

@@ -0,0 +1,3 @@
+node_modules
+npm-debug.log
+sandbox

.gitignore

@@ -0,0 +1,8 @@
+node_modules
+*.log
+*.bin
+.DS_Store
+.venv
+*.mp4
+sandbox
+scripts

.nvmrc

@@ -0,0 +1 @@
+v18.16.0

Dockerfile

@@ -0,0 +1,159 @@
+#FROM nvidia/cuda:12.2.0-devel-ubuntu20.04
+# let's try to downgrade the version of CUDA
+FROM nvidia/cuda:11.8.0-devel-ubuntu20.04
+
+LABEL maintainer="Hugging Face"
+
+ARG DEBIAN_FRONTEND=noninteractive
+
+# Use login shell to read variables from `~/.profile` (to pass dynamic created variables between RUN commands)
+SHELL ["sh", "-lc"]
+
+# WORKDIR /workdir
+
+RUN apt update
+
+# base stuff
+RUN apt --yes install build-essential wget curl rpl
+
+# NodeJS - LEGACY/DEPRECATED WAY
+#RUN curl -fsSL https://deb.nodesource.com/setup_18.x | bash -
+#RUN apt --yes install nodejs
+
+# NodeJS - NEW, MORE ANNOYING WAY
+RUN apt --yes install -y ca-certificates gnupg
+RUN mkdir -p /etc/apt/keyrings
+RUN curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg
+ENV NODE_MAJOR=20
+RUN echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_$NODE_MAJOR.x nodistro main" | tee /etc/apt/sources.list.d/nodesource.list
+RUN apt update
+RUN apt --yes install nodejs
+
+# git and file management
+RUN apt --yes install git git-lfs unzip
+RUN git lfs install
+
+# Python
+RUN apt --yes install python3 python3-pip
+RUN python3 -m pip install --no-cache-dir --upgrade pip
+
+
+# required for CMake it seems
+RUN apt --yes install libtbb-dev libeigen3-dev g++ libssl-dev checkinstall
+
+
+# The app require CMake 3.24+ but this version of Ubuntu only has the 3.16
+# So we need to install a more recent version
+#RUN apt-get update \
+#  && rm -rf /var/lib/apt/lists/* \
+RUN wget https://github.com/Kitware/CMake/releases/download/v3.24.1/cmake-3.24.1-Linux-x86_64.sh \
+  -q -O /tmp/cmake-install.sh \
+  && chmod u+x /tmp/cmake-install.sh \
+  && mkdir /opt/cmake-3.24.1 \
+  && /tmp/cmake-install.sh --skip-license --prefix=/opt/cmake-3.24.1 \
+  && rm /tmp/cmake-install.sh \
+  && ln -s /opt/cmake-3.24.1/bin/* /usr/local/bin
+
+# Install cmake 3.24
+#RUN wget https://github.com/Kitware/CMake/releases/download/v3.24.1/cmake-3.22.1.tar.gz \
+# && tar -zvxf cmake-3.24.1.tar.gz \
+# && cd cmake-3.24.1 \
+# && ./bootstrap \
+# && make -j8 \
+# && checkinstall --pkgname=cmake --pkgversion="3.20-custom" --default
+# Copy contents from 2 levels up
+#COPY . ./
+
+# Download and extract libtorch
+#RUN wget https://download.pytorch.org/libtorch/cu118/libtorch-cxx11-abi-shared-with-deps-2.0.1%2Bcu118.zip \
+# && unzip libtorch-cxx11-abi-shared-with-deps-2.0.1+cu118.zip -d external/
+
+
+# Set up a new user named "user" with user ID 1000
+RUN useradd -o -u 1000 user
+
+# Switch to the "user" user
+USER user
+
+ENV PYTHON_BIN /usr/bin/python3
+
+
+#ENV PATH /usr/local/cuda-12.2/bin:$PATH
+#ENV LD_LIBRARY_PATH /usr/local/cuda-12.2/lib64:$LD_LIBRARY_PATH
+# Let's try to downgrade
+ENV PATH /usr/local/cuda-11.8/bin:$PATH
+ENV LD_LIBRARY_PATH /usr/local/cuda-11.8/lib64:$LD_LIBRARY_PATH
+
+
+# Set home to the user's home directory
+ENV HOME=/home/user \
+	PATH=/home/user/.local/bin:$PATH
+
+# Set the working directory to the user's home directory
+WORKDIR $HOME/app
+
+# Install app dependencies
+# A wildcard is used to ensure both package.json AND package-lock.json are copied
+# where available (npm@5+)
+COPY --chown=user package*.json $HOME/app
+
+RUN npm install
+
+# Copy the current directory contents into the container at $HOME/app setting the owner to the user
+COPY --chown=user . $HOME/app
+
+RUN git clone --recursive https://github.com/MrNeRF/gaussian-splatting-cuda
+
+WORKDIR $HOME/app/gaussian-splatting-cuda
+
+RUN wget https://download.pytorch.org/libtorch/cu118/libtorch-cxx11-abi-shared-with-deps-2.0.1%2Bcu118.zip  
+RUN unzip libtorch-cxx11-abi-shared-with-deps-2.0.1+cu118.zip -d external/
+RUN rm libtorch-cxx11-abi-shared-with-deps-2.0.1+cu118.zip
+
+# Build (on CPU, this will add compute_35 as build target, which we do not want)
+# There seems to be a work around, see this thread:
+# https://github.com/MrNeRF/gaussian-splatting-cuda/issues/14
+# here is the hack:
+
+# Replace "native" by "all"
+# inspired by https://github.com/ztxz16/fastllm/pull/309/files
+#
+
+# CUDA architectures are defined as codes
+# by default CMake detected:
+# 3.5;5.0;8.0;8.6;8.9;9.0
+# To see the mapping: https://arnon.dk/matching-sm-architectures-arch-and-gencode-for-various-nvidia-cards/
+# A10G and A100 -> Ampere -> sm_80, sm_86, sm_87 -> 8.0;8.6;8.7
+# Nvidia T4 -> Turing -> sm_75 -> 7.5
+# ? -> Lovelace ->  sm_89 -> 8.6
+# ? -> Hopper -> sm_90 -> 9.0
+
+# this doesn't something, but then it still try to build for arch 3.5 / 35
+# RUN find . -name CMakeLists.txt -exec sed -i 's/CUDA_ARCHITECTURES native/CUDA_ARCHITECTURES "80;86;89;90"/' {} +
+
+RUN find . -name CMakeLists.txt -exec sed -i 's/CUDA_ARCHITECTURES native/CUDA_ARCHITECTURES all/' {} +
+
+#RUN cmake -B build -D CMAKE_BUILD_TYPE=Release -D CUDA_TOOLKIT_ROOT_DIR=/usr/local/cuda-12.2/ -D CUDA_VERSION=12.2
+# Let's try to downgrade the version
+RUN cmake -B build -D CMAKE_BUILD_TYPE=Release -D CUDA_TOOLKIT_ROOT_DIR=/usr/local/cuda-11.8/ -D CUDA_VERSION=11.8
+
+RUN ls -la build/
+RUN ls -la build/external/
+RUN ls -la build/CMakeFiles
+
+# we actually cannot generate for "all" architectures: compute_35 is not supported anymore
+# RUN find . -name CMakeLists.txt -exec sed -i 's/-gencode arch=compute_35,code=sm_35//' {} +
+
+RUN cmake --build build -- -j8
+
+COPY --chown=user . $HOME/app/gaussian-splatting-cuda
+
+# do we need to copy cuda over? I don't think so?
+#WORKDIR /usr/local/cuda-12.2
+#COPY --chown=user . $HOME/app/cuda-12.2
+
+EXPOSE 7860
+
+# we can't use this (it time out)
+# CMD [ "xvfb-run", "-s", "-ac -screen 0 1920x1080x24", "npm", "run", "start" ]
+CMD [ "npm", "run", "start" ]

LICENSE.txt

@@ -0,0 +1,201 @@
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README.md

@@ -0,0 +1,9 @@
+---
+title: Gaussian Splatting API
+emoji: 🎨
+colorFrom: green
+colorTo: yellow
+sdk: docker
+pinned: true
+app_port: 3000
+---

package-lock.json

@@ -0,0 +1,1838 @@
+{
+  "name": "@jbilcke-hf/splatter-api",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "@jbilcke-hf/splatter-api",
+      "version": "1.0.0",
+      "license": "Apache License",
+      "dependencies": {
+        "@gorgonjs/file-provider": "^1.4.1",
+        "@gorgonjs/gorgon": "^1.4.1",
+        "@types/express": "^4.17.17",
+        "@types/uuid": "^9.0.2",
+        "eventsource-parser": "^1.0.0",
+        "express": "^4.18.2",
+        "fs-extra": "^11.1.1",
+        "node-fetch": "^3.3.1",
+        "resize-base64": "^1.0.12",
+        "sharp": "^0.32.4",
+        "temp-dir": "^3.0.0",
+        "ts-node": "^10.9.1",
+        "uuid": "^9.0.0",
+        "yaml": "^2.3.1"
+      }
+    },
+    "node_modules/@cspotcode/source-map-support": {
+      "version": "0.8.1",
+      "resolved": "https://registry.npmjs.org/@cspotcode/source-map-support/-/source-map-support-0.8.1.tgz",
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+      "dependencies": {
+        "@jridgewell/trace-mapping": "0.3.9"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/@gorgonjs/file-provider": {
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+      }
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+        "run-parallel": "^1.1.9"
+      },
+      "engines": {
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+      }
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+    "node_modules/vary": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha512-BNGbWLfd0eUPabhkXUVm0j8uuvREyTh5ovRa/dyow/BqAbZJyC+5fU+IzQOzmAKzYqYRAISoRhdQr3eIZ/PXqg==",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
+    "node_modules/web-streams-polyfill": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/web-streams-polyfill/-/web-streams-polyfill-3.2.1.tgz",
+      "integrity": "sha512-e0MO3wdXWKrLbL0DgGnUV7WHVuw9OUvL4hjgnPkIeEvESk74gAITi5G606JtZPp39cd8HA9VQzCIvA49LpPN5Q==",
+      "engines": {
+        "node": ">= 8"
+      }
+    },
+    "node_modules/wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ=="
+    },
+    "node_modules/yallist": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
+    },
+    "node_modules/yaml": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.3.2.tgz",
+      "integrity": "sha512-N/lyzTPaJasoDmfV7YTrYCI0G/3ivm/9wdG0aHuheKowWQwGTsK0Eoiw6utmzAnI6pkJa0DUVygvp3spqqEKXg==",
+      "engines": {
+        "node": ">= 14"
+      }
+    },
+    "node_modules/yn": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/yn/-/yn-3.1.1.tgz",
+      "integrity": "sha512-Ux4ygGWsu2c7isFWe8Yu1YluJmqVhxqK2cLXNQA5AcC3QfbGNpM7fu0Y8b/z16pXLnFxZYvWhd3fhBY9DLmC6Q==",
+      "engines": {
+        "node": ">=6"
+      }
+    }
+  }
+}

package.json

@@ -0,0 +1,30 @@
+{
+  "name": "@jbilcke-hf/splatter-api",
+  "version": "1.0.0",
+  "description": "A space to generate gaussian splatting scenes",
+  "main": "src/index.mts",
+  "scripts": {
+    "start": "node --loader ts-node/esm src/index.mts",
+    "docker": "npm run docker:build && npm run docker:run",
+    "docker:build": "docker build -t community-api .",
+    "docker:run": "docker run -it -p 7860:7860 community-api"
+  },
+  "author": "Julian Bilcke <[email protected]>",
+  "license": "Apache License",
+  "dependencies": {
+    "@gorgonjs/file-provider": "^1.4.1",
+    "@gorgonjs/gorgon": "^1.4.1",
+    "@types/express": "^4.17.17",
+    "@types/uuid": "^9.0.2",
+    "eventsource-parser": "^1.0.0",
+    "express": "^4.18.2",
+    "fs-extra": "^11.1.1",
+    "node-fetch": "^3.3.1",
+    "resize-base64": "^1.0.12",
+    "sharp": "^0.32.4",
+    "temp-dir": "^3.0.0",
+    "ts-node": "^10.9.1",
+    "uuid": "^9.0.0",
+    "yaml": "^2.3.1"
+  }
+}

post-install.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+# This script is used to install the remaining of the app requiring CUDA stuff
+
+echo "Running post-install script (go take a coffee, this is gonna take a while)"
+
+echo "cmake -B build"
+# cmake -B build -D CMAKE_BUILD_TYPE=Release -D CUDA_TOOLKIT_ROOT_DIR=/usr/local/cuda-12.2/ -D CUDA_VERSION=12.2
+cmake -B build -D CMAKE_BUILD_TYPE=Release -D CUDA_VERSION=12.2
+
+echo "cmake --build build"
+cmake --build build -- -j8
+
+echo "dependency is finally built!"

src/config.mts

@@ -0,0 +1,8 @@
+import path from "node:path"
+
+export const storagePath = `${process.env.STORAGE_PATH || './sandbox'}`
+
+export const postDirFilePath = path.join(storagePath, "posts")
+
+export const shotFormatVersion = 1
+export const sequenceFormatVersion = 1

src/gaussian-splatting.mts

@@ -0,0 +1,72 @@
+import { exec } from "child_process"
+
+/**
+ * Interface for the options for the `runGaussianSplattingCUDA` function.
+ */
+interface Options {
+  /**
+   * Data path for the training data.
+   */
+  dataPath?: string;
+  
+  /**
+   * If set, forces the overwriting of the output folder. If not set,
+   * the program exits if the output folder already exists.
+   */
+  force?: boolean;
+  
+  /**
+   * Path where the trained model will be saved. If this option isn't specified,
+   * the model will be saved to the "output" folder in the root directory of the project.
+   */
+  outputPath?: string;
+  
+  /**
+   * Specifies the number of iterations to train the model.
+   */
+  iterations?: number;
+  
+  /**
+   * If set, CUDA memory is emptied every 100 iterations.
+   */
+  emptyGpuCache?: boolean;
+  
+  /**
+   * If set, the program monitors the average convergence rate throughout training. 
+   * When the average convergence rate drops below 0.008 after 15k iterations,
+   * optimization stops, which speeds up training when the gain starts to diminish.
+   */
+  enableCRMonitoring?: boolean;
+  
+  /**
+   * When the `enableCRMonitoring` flag is set, this sets a custom average convergence rate for training.
+   */
+  convergenceRate?: number;
+}
+
+/**
+ * Run 3D Gaussian Splatting CUDA Implementation.
+ *
+ * @param {Options} options - A set of configurations to be passed to the application
+ */
+export const runGaussianSplattingCUDA = (options: Options): Promise<string> => {
+  return new Promise((resolve, reject) => {
+    let command = './build/gaussian_splatting_cuda';
+
+    if (options.dataPath) command += ` -d ${options.dataPath}`;
+    if (options.force) command += ' -f';
+    if (options.outputPath) command += ` -o ${options.outputPath}`;
+    if (options.iterations) command += ` -i ${options.iterations}`;
+    if (options.emptyGpuCache) command += ' --empty-gpu-cache';
+    if (options.enableCRMonitoring) command += ' --enable-cr-monitoring';
+    if (options.convergenceRate) command += ` -c ${options.convergenceRate}`;
+
+    exec(command, (error, stdout, stderr) => {
+      if (error) {
+        reject(stderr);
+      } else {
+        resolve(stdout);
+      }
+    });
+  });
+};

src/index.mts

@@ -0,0 +1,26 @@
+
+import express from "express"
+import { initFolders } from "./initFolders.mts"
+
+initFolders()
+
+const app = express()
+const port = 7860
+
+// fix this error: "PayloadTooLargeError: request entity too large"
+// there are multiple version because.. yeah well, it's Express!
+// app.use(bodyParser.json({limit: '50mb'}));
+//app.use(bodyParser.urlencoded({limit: '50mb', extended: true}));
+app.use(express.json({limit: '50mb'}));
+app.use(express.urlencoded({limit: '50mb', extended: true}));
+
+app.get("/", async (req, res) => {
+  // this is what users will see in the space - but no need to show something scary
+  res.status(200)
+  res.write(`<html><head></head><body>
+Splatter API is a micro-service used to generate gaussian splatting scenes.
+    </body></html>`)
+  res.end()
+})
+
+app.listen(port, () => { console.log(`Open http://localhost:${port}`) })

src/initFolders.mts

@@ -0,0 +1,12 @@
+import {
+  postDirFilePath
+} from "./config.mts"
+import { createDirIfNeeded } from "./utils/createDirIfNeeded.mts"
+
+export const initFolders = () => {
+
+  console.log("no new folder to create")
+  
+ //  console.log(`initializing folders..`)
+  // createDirIfNeeded(postDirFilePath)
+}

src/types.mts

@@ -0,0 +1,35 @@
+
+export type PostVisibility =
+  | "featured" // featured by admins
+  | "trending" // top trending / received more than 10 upvotes
+  | "normal" // default visibility
+
+export type Post = {
+  postId: string
+  appId: string
+  prompt: string
+  previewUrl: string
+  assetUrl: string
+  createdAt: string
+  visibility: PostVisibility
+  upvotes: number
+  downvotes: number
+}
+
+export type CreatePostResponse = {
+  success?: boolean
+  error?: string
+  post: Post
+}
+
+export type GetAppPostsResponse = {
+  success?: boolean
+  error?: string
+  posts: Post[]
+}
+
+export type GetAppPostResponse = {
+  success?: boolean
+  error?: string
+  post: Post
+}

src/utils/createDirIfNeeded.mts

@@ -0,0 +1,7 @@
+import { existsSync, mkdirSync } from "node:fs"
+
+export const createDirIfNeeded = (dirPath: string) => {
+  if (!existsSync(dirPath)) {
+    mkdirSync(dirPath, { recursive: true })
+  }
+}

src/utils/debouncePromise.mts

@@ -0,0 +1,66 @@
+/*
+
+Here's how you can use the `debouncePromise` function:
+
+```typescript
+async function fetchData(query: string): Promise<string> {
+  // Simulating an API call
+  return new Promise((resolve) => {
+    setTimeout(() => {
+      resolve(`Results for ${query}`);
+    }, 500);
+  });
+}
+
+const debouncedFetchData = debouncePromise(fetchData, 300);
+
+(async () => {
+  try {
+    console.log(await debouncedFetchData("query 1")); // This will be ignored
+    console.log(await debouncedFetchData("query 2")); // This will be ignored
+    console.log(await debouncedFetchData("query 3")); // This will return "Results for query 3"
+  } catch (error) {
+    console.error(error);
+  }
+})();
+```
+
+The `debouncePromise` function takes a Promise-based function `func` and a `wait` time as its arguments.
+It returns a debounced version of the given function that, when called multiple times within the specified wait time, will only execute the last call.
+*/
+
+type DebouncedFunction<T extends any[], R> = ((...args: T) => R) & {
+  clear: () => void
+}
+
+export function debouncePromise<T extends any[], R>(
+  func: (...args: T) => Promise<R>,
+  wait: number
+): DebouncedFunction<T, Promise<R | undefined>> {
+  let timeout: NodeJS.Timeout | undefined
+
+  const debounced = (...args: T) => {
+    return new Promise<R | undefined>((resolve, reject) => {
+      if (timeout) {
+        clearTimeout(timeout)
+      }
+
+      timeout = setTimeout(async () => {
+        try {
+          const result = await func(...args)
+          resolve(result)
+        } catch (error) {
+          reject(error)
+        }
+      }, wait)
+    })
+  }
+
+  debounced.clear = () => {
+    if (timeout) {
+      clearTimeout(timeout)
+    }
+  }
+
+  return debounced
+}

src/utils/debounceSync.mts

@@ -0,0 +1,59 @@
+type DebouncedFunctionSync<T extends any[], R> = ((...args: T) => R) & {
+  clear: () => void
+}
+
+/**
+ * Example usage:
+ * ```typescript
+ *   function fetchDataSync(query: string): string {
+ *     return `Results for ${query}`;
+ *   }
+ *
+ *   const debouncedFetchDataSync = debounceSync(fetchDataSync, 300);
+ *
+ *   try {
+ *    console.log(debouncedFetchDataSync("query 1")); // This will be ignored
+ *     console.log(debouncedFetchDataSync("query 2")); // This will be ignored
+ *     console.log(debouncedFetchDataSync("query 3")); // This will return "Results for query 3"
+ *   } catch (error) {
+ *     console.error(error);
+ *   }
+ * ```
+ *
+ * Note that the synchronous version of the debounce function will return
+ * the result of the last function call or `undefined` if the function was
+ * not called within the specified wait time. You should also be aware that
+ * this synchronous version may cause blocking if the debounced function
+ * takes a long time to execute.
+ *
+ * @param func
+ * @param wait
+ * @returns
+ */
+export function debounceSync<T extends any[], R>(
+  func: (...args: T) => R,
+  wait: number
+): DebouncedFunctionSync<T, R | undefined> {
+  let timeout: NodeJS.Timeout | undefined
+
+  const debounced = (...args: T): R | undefined => {
+    if (timeout) {
+      clearTimeout(timeout)
+    }
+
+    let result: R | undefined
+    timeout = setTimeout(() => {
+      result = func(...args)
+    }, wait)
+
+    return result
+  }
+
+  debounced.clear = () => {
+    if (timeout) {
+      clearTimeout(timeout)
+    }
+  }
+
+  return debounced
+}

src/utils/deleteAllFilesWith.mts

@@ -0,0 +1,15 @@
+import { promises as fs } from "node:fs"
+import path from "node:path"
+
+export const deleteFilesWithName = async (dir: string, name: string) => {
+  for (const file of await fs.readdir(dir)) {
+    if (file.includes(name)) {
+      const filePath = path.join(dir, file)
+      try {
+        await fs.unlink(filePath)
+      } catch (err) {
+        console.error(`failed to unlink file in ${filePath}: ${err}`)
+      }
+    }
+  }
+}

src/utils/deleteFileIfExists.mts

@@ -0,0 +1,18 @@
+import { existsSync, promises as fs } from "node:fs"
+
+export const deleteFileIfExists = async (filePath: string) => {
+  // this function scares me a bit, 
+  if (filePath === "/" || filePath === "~" || filePath === ".") {
+    throw new Error(`lol, no.`)
+  }
+
+  if (existsSync(filePath)) {
+    try {
+      await fs.unlink(filePath)
+      return true
+    } catch (err) {
+      console.log(`failed to delete file ${filePath}`)
+    }
+  }
+  return false
+}

src/utils/downloadFileAsBase64.mts

@@ -0,0 +1,17 @@
+export const downloadImageAsBase64 = async (remoteUrl: string): Promise<string> => {
+  const controller = new AbortController()
+
+  // download the image
+  const response = await fetch(remoteUrl, {
+    signal: controller.signal
+  })
+
+  // get as Buffer
+  const arrayBuffer = await response.arrayBuffer()
+  const buffer = Buffer.from(arrayBuffer)
+
+  // convert it to base64
+  const base64 = buffer.toString('base64')
+
+  return base64
+};

src/utils/downloadFileToTmp.mts

@@ -0,0 +1,29 @@
+import path from "node:path"
+import fs from "node:fs"
+
+import tmpDir from "temp-dir"
+
+export const downloadFileToTmp = async (remoteUrl: string, fileName: string) => {
+
+  const filePath = path.resolve(tmpDir, fileName)
+
+  const controller = new AbortController()
+  const timeoutId = setTimeout(() => controller.abort(), 15 * 60 * 60 * 1000) // 15 minutes
+
+  // TODO finish the timeout?
+
+  // download the file
+  const response = await fetch(remoteUrl, {
+    signal: controller.signal
+  })
+
+  // write it to the disk
+  const arrayBuffer = await response.arrayBuffer()
+
+  await fs.promises.writeFile(
+    filePath,
+    Buffer.from(arrayBuffer)
+  )
+
+  return filePath
+}

src/utils/getValidBoolean.mts

@@ -0,0 +1,9 @@
+export const getValidBoolean = (something: any, defaultValue: boolean) => {
+  if (typeof something === "boolean") {
+    return something
+  }
+
+  const strValue = `${something || defaultValue}`.toLowerCase()
+  
+  return strValue === "true" || strValue === "1" || strValue === "on"
+}

src/utils/getValidNumber.mts

@@ -0,0 +1,10 @@
+export const getValidNumber = (something: any, minValue: number, maxValue: number, defaultValue: number) => {
+  const strValue = `${something || defaultValue}`
+  const numValue = Number(strValue)
+  const isValid = !isNaN(numValue) && isFinite(numValue)
+  if (!isValid) {
+    return defaultValue
+  }
+  return Math.max(minValue, Math.min(maxValue, numValue))
+ 
+}

src/utils/getValidResolution.mts

@@ -0,0 +1,16 @@
+import { getValidNumber } from "./getValidNumber.mts"
+
+export const getValidResolution = (something: any) => {
+  const strValue = `${something || ''}`
+  const chunks = strValue.split('x')
+
+  if (chunks.length !== 2) {
+    return `1280x720`
+  }
+
+  const [widthStr, heightStr] = chunks
+  const width = getValidNumber(widthStr, 256, 1280, 1280)
+  const height = getValidNumber(widthStr, 256, 720, 720)
+
+  return `${width}x${height}`
+}

src/utils/hasValidAuthorization.mts

@@ -0,0 +1,10 @@
+import { IncomingHttpHeaders } from "node:http"
+
+export const hasValidAuthorization = (headers: IncomingHttpHeaders) => {
+  const [_, token] = `${headers.authorization || ""}`.split(" ")
+  if (typeof token === "string" && token.trim() === process.env.SECRET_ACCESS_TOKEN.trim()) {
+    return true
+  }
+
+  return false
+}

src/utils/hashRequest.mts

@@ -0,0 +1,24 @@
+import { RenderRequest } from "../types.mts"
+import { computeSha256 } from "./computeSha256.mts"
+
+export function hashRequest(request: RenderRequest) {
+
+  // we ignore the commands associated to cache and stuff
+  const hashable = {
+    version: 1,
+    prompt: request.prompt,
+    segmentation: request.segmentation,
+    actionnables: request.actionnables,
+    nbFrames: request.nbFrames,
+    nbSteps: request.nbSteps,
+    // seed: request.seed,
+    width: request.width,
+    height: request.height,
+    projection: request.projection,
+  }
+
+  const requestJson = JSON.stringify(hashable)
+  const hash = computeSha256(requestJson)
+
+  return hash
+}

src/utils/moveFile.mts

@@ -0,0 +1,15 @@
+import { promises as fs } from "node:fs"
+
+// a function to move a file
+// this implementation is safe to use on a Hugging Face Space
+// for instance when copying from one disk to another
+// (we cannot use fs.rename in that case)
+export const moveFile = async (sourceFilePath: string, targetFilePath: string) => {
+  await fs.copyFile(sourceFilePath, targetFilePath)
+  console.log(`moved file from ${sourceFilePath} to ${targetFilePath}`)
+  try {
+    await fs.unlink(sourceFilePath)
+  } catch (err) {
+    console.log("moveFile: failed to cleanup (no big deal..)")
+  }
+}

src/utils/randomShuffle.mts

@@ -0,0 +1,8 @@
+export function randomShuffle<T>(array: T[]): T[] { 
+  for (let i = array.length - 1; i > 0; i--) { 
+    const j = Math.floor(Math.random() * (i + 1));
+    [array[i], array[j]] = [array[j], array[i]];
+  } 
+
+  return array
+}; 

src/utils/sleep.mts

@@ -0,0 +1,6 @@
+export const sleep = async (durationInMs: number) =>
+  new Promise((resolve) => {
+    setTimeout(() => {
+      resolve(true)
+    }, durationInMs)
+  })

tsconfig.json

@@ -0,0 +1,12 @@
+{
+   "compilerOptions": {
+    "allowJs": true,
+    "esModuleInterop": true,
+    "allowSyntheticDefaultImports": true,
+    "module": "nodenext",
+    "noEmit": true,
+    "allowImportingTsExtensions": true,
+    "target": "es2022"
+  },
+  "include": ["**/*.ts", "**/*.mts"],
+}