From e223be9452a7af9d089275ae734f65beb8f026f7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C9=A7=CF=83=E2=84=93=CF=83?=
 <paulin.segura@etudiant.univ-lr.fr>
Date: Wed, 10 Dec 2025 19:12:58 +0100
Subject: [PATCH] feat: add PDF viewer command with page navigation and
 multi-project support improvements

---
 .env.example                                  |   1 +
 Dockerfile                                    |   8 +-
 package-lock.json                             | 938 +++++++++++++++++-
 package.json                                  |  21 +-
 src/commands/Commands.js                      |  16 +
 .../definitions/CommandDefinitions.js         |  24 +-
 src/commands/handlers/PdfHandler.js           | 227 +++++
 src/config/config.js                          |  14 +-
 src/index.js                                  |  16 +-
 src/services/CommandService.js                |  28 +
 10 files changed, 1255 insertions(+), 38 deletions(-)
 create mode 100644 src/commands/handlers/PdfHandler.js

diff --git a/.env.example b/.env.example
index a4b7286..81bb130 100644
--- a/.env.example
+++ b/.env.example
@@ -7,6 +7,7 @@ GITLAB_URL=https://gitlab.example.com
 GITLAB_TOKEN=your_gitlab_private_token_here
 
 # Configuration Bot
+# ALLOW_NO_PROJECTS=true
 SYNC_INTERVAL_MINUTES=5
 LOG_LEVEL=info
 
diff --git a/Dockerfile b/Dockerfile
index 00ff877..01f3fb6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,8 +7,10 @@ WORKDIR /app
 # Copie les fichiers de dépendances
 COPY package*.json ./
 
-# Installe les dépendances
-RUN npm ci --only=production && npm cache clean --force
+# Dépendances natives pour sharp/canvas/pdfjs sur Alpine
+RUN apk add --no-cache python3 make g++ cairo-dev pango-dev libjpeg-turbo-dev giflib-dev freetype-dev pkgconfig \
+  && npm ci --only=production \
+  && npm cache clean --force
 
 # Copie le code source
 COPY src/ ./src/
@@ -37,4 +39,4 @@ CMD ["node", "src/index.js"]
 # Labels pour la documentation
 LABEL maintainer="paulinsegura79@gmail.com"
 LABEL description="Bot Discord pour synchroniser les issue boards GitLab"
-LABEL version="1.0.0"
+LABEL version="1.1.0"
diff --git a/package-lock.json b/package-lock.json
index 65377fa..3d1b122 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,18 +1,21 @@
 {
-  "name": "gitlab-discord-kanban-bot",
+  "name": "gitlab-issue-discord-bot",
   "version": "1.0.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
-      "name": "gitlab-discord-kanban-bot",
+      "name": "gitlab-issue-discord-bot",
       "version": "1.0.0",
       "license": "MIT",
       "dependencies": {
         "axios": "^1.6.2",
+        "canvas": "^2.11.2",
         "discord.js": "^14.14.1",
         "dotenv": "^16.3.1",
-        "node-cron": "^3.0.3"
+        "node-cron": "^3.0.3",
+        "pdfjs-dist": "^3.11.174",
+        "sharp": "^0.33.3"
       },
       "devDependencies": {
         "eslint": "^8.56.0",
@@ -646,6 +649,15 @@
         "url": "https://github.com/discordjs/discord.js?sponsor"
       }
     },
+    "node_modules/@emnapi/runtime": {
+      "version": "1.7.1",
+      "resolved": "https://registry.npmjs.org/@emnapi/runtime/-/runtime-1.7.1.tgz",
+      "integrity": "sha512-PVtJr5CmLwYAU9PZDMITZoR5iAOShYREoR45EyyLrbntV50mdePTgUn4AmOw90Ifcj+x2kRjdzr1HP3RrNiHGA==",
+      "optional": true,
+      "dependencies": {
+        "tslib": "^2.4.0"
+      }
+    },
     "node_modules/@eslint-community/eslint-utils": {
       "version": "4.9.0",
       "resolved": "https://registry.npmjs.org/@eslint-community/eslint-utils/-/eslint-utils-4.9.0.tgz",
@@ -747,6 +759,348 @@
       "dev": true,
       "license": "BSD-3-Clause"
     },
+    "node_modules/@img/sharp-darwin-arm64": {
+      "version": "0.33.5",
+      "resolved": "https://registry.npmjs.org/@img/sharp-darwin-arm64/-/sharp-darwin-arm64-0.33.5.tgz",
+      "integrity": "sha512-UT4p+iz/2H4twwAoLCqfA9UH5pI6DggwKEGuaPy7nCVQ8ZsiY5PIcrRvD1DzuY3qYL07NtIQcWnBSY/heikIFQ==",
+      "cpu": [
+        "arm64"
+      ],
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": "^18.17.0 || ^20.3.0 || >=21.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      },
+      "optionalDependencies": {
+        "@img/sharp-libvips-darwin-arm64": "1.0.4"
+      }
+    },
+    "node_modules/@img/sharp-darwin-x64": {
+      "version": "0.33.5",
+      "resolved": "https://registry.npmjs.org/@img/sharp-darwin-x64/-/sharp-darwin-x64-0.33.5.tgz",
+      "integrity": "sha512-fyHac4jIc1ANYGRDxtiqelIbdWkIuQaI84Mv45KvGRRxSAa7o7d1ZKAOBaYbnepLC1WqxfpimdeWfvqqSGwR2Q==",
+      "cpu": [
+        "x64"
+      ],
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": "^18.17.0 || ^20.3.0 || >=21.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      },
+      "optionalDependencies": {
+        "@img/sharp-libvips-darwin-x64": "1.0.4"
+      }
+    },
+    "node_modules/@img/sharp-libvips-darwin-arm64": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-darwin-arm64/-/sharp-libvips-darwin-arm64-1.0.4.tgz",
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+      "cpu": [
+        "arm64"
+      ],
+      "optional": true,
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+      ],
+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      }
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+    "node_modules/@img/sharp-libvips-darwin-x64": {
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+      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-darwin-x64/-/sharp-libvips-darwin-x64-1.0.4.tgz",
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+      "cpu": [
+        "x64"
+      ],
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      }
+    },
+    "node_modules/@img/sharp-libvips-linux-arm": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-linux-arm/-/sharp-libvips-linux-arm-1.0.5.tgz",
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+      "cpu": [
+        "arm"
+      ],
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      }
+    },
+    "node_modules/@img/sharp-libvips-linux-arm64": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-linux-arm64/-/sharp-libvips-linux-arm64-1.0.4.tgz",
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+      "optional": true,
+      "os": [
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+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      }
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+    "node_modules/@img/sharp-libvips-linux-s390x": {
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-linux-s390x/-/sharp-libvips-linux-s390x-1.0.4.tgz",
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+      "optional": true,
+      "os": [
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+      "funding": {
+        "url": "https://opencollective.com/libvips"
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+      "funding": {
+        "url": "https://opencollective.com/libvips"
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+      "funding": {
+        "url": "https://opencollective.com/libvips"
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+      ],
+      "funding": {
+        "url": "https://opencollective.com/libvips"
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+      "version": "0.33.5",
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+        "arm"
+      ],
+      "optional": true,
+      "os": [
+        "linux"
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+      "engines": {
+        "node": "^18.17.0 || ^20.3.0 || >=21.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      },
+      "optionalDependencies": {
+        "@img/sharp-libvips-linux-arm": "1.0.5"
+      }
+    },
+    "node_modules/@img/sharp-linux-arm64": {
+      "version": "0.33.5",
+      "resolved": "https://registry.npmjs.org/@img/sharp-linux-arm64/-/sharp-linux-arm64-0.33.5.tgz",
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+        "arm64"
+      ],
+      "optional": true,
+      "os": [
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+      ],
+      "engines": {
+        "node": "^18.17.0 || ^20.3.0 || >=21.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      },
+      "optionalDependencies": {
+        "@img/sharp-libvips-linux-arm64": "1.0.4"
+      }
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+    "node_modules/@img/sharp-linux-s390x": {
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+        "s390x"
+      ],
+      "optional": true,
+      "os": [
+        "linux"
+      ],
+      "engines": {
+        "node": "^18.17.0 || ^20.3.0 || >=21.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      },
+      "optionalDependencies": {
+        "@img/sharp-libvips-linux-s390x": "1.0.4"
+      }
+    },
+    "node_modules/@img/sharp-linux-x64": {
+      "version": "0.33.5",
+      "resolved": "https://registry.npmjs.org/@img/sharp-linux-x64/-/sharp-linux-x64-0.33.5.tgz",
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+        "node": "^18.17.0 || ^20.3.0 || >=21.0.0"
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+      "funding": {
+        "url": "https://opencollective.com/libvips"
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+        "arm64"
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+      },
+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      },
+      "optionalDependencies": {
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+      }
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+      },
+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      },
+      "optionalDependencies": {
+        "@img/sharp-libvips-linuxmusl-x64": "1.0.4"
+      }
+    },
+    "node_modules/@img/sharp-wasm32": {
+      "version": "0.33.5",
+      "resolved": "https://registry.npmjs.org/@img/sharp-wasm32/-/sharp-wasm32-0.33.5.tgz",
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+      "cpu": [
+        "wasm32"
+      ],
+      "optional": true,
+      "dependencies": {
+        "@emnapi/runtime": "^1.2.0"
+      },
+      "engines": {
+        "node": "^18.17.0 || ^20.3.0 || >=21.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      }
+    },
+    "node_modules/@img/sharp-win32-ia32": {
+      "version": "0.33.5",
+      "resolved": "https://registry.npmjs.org/@img/sharp-win32-ia32/-/sharp-win32-ia32-0.33.5.tgz",
+      "integrity": "sha512-T36PblLaTwuVJ/zw/LaH0PdZkRz5rd3SmMHX8GSmR7vtNSP5Z6bQkExdSK7xGWyxLw4sUknBuugTelgw2faBbQ==",
+      "cpu": [
+        "ia32"
+      ],
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": "^18.17.0 || ^20.3.0 || >=21.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      }
+    },
+    "node_modules/@img/sharp-win32-x64": {
+      "version": "0.33.5",
+      "resolved": "https://registry.npmjs.org/@img/sharp-win32-x64/-/sharp-win32-x64-0.33.5.tgz",
+      "integrity": "sha512-MpY/o8/8kj+EcnxwvrP4aTJSWw/aZ7JIGR4aBeZkZw5B7/Jn+tY9/VNwtcoGmdT7GfggGIU4kygOMSbYnOrAbg==",
+      "cpu": [
+        "x64"
+      ],
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": "^18.17.0 || ^20.3.0 || >=21.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      }
+    },
     "node_modules/@istanbuljs/load-nyc-config": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/@istanbuljs/load-nyc-config/-/load-nyc-config-1.1.0.tgz",
@@ -1206,6 +1560,58 @@
         "@jridgewell/sourcemap-codec": "^1.4.14"
       }
     },
+    "node_modules/@mapbox/node-pre-gyp": {
+      "version": "1.0.11",
+      "resolved": "https://registry.npmjs.org/@mapbox/node-pre-gyp/-/node-pre-gyp-1.0.11.tgz",
+      "integrity": "sha512-Yhlar6v9WQgUp/He7BdgzOz8lqMQ8sU+jkCq7Wx8Myc5YFJLbEe7lgui/V7G1qB1DJykHSGwreceSaD60Y0PUQ==",
+      "dependencies": {
+        "detect-libc": "^2.0.0",
+        "https-proxy-agent": "^5.0.0",
+        "make-dir": "^3.1.0",
+        "node-fetch": "^2.6.7",
+        "nopt": "^5.0.0",
+        "npmlog": "^5.0.1",
+        "rimraf": "^3.0.2",
+        "semver": "^7.3.5",
+        "tar": "^6.1.11"
+      },
+      "bin": {
+        "node-pre-gyp": "bin/node-pre-gyp"
+      }
+    },
+    "node_modules/@mapbox/node-pre-gyp/node_modules/make-dir": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/make-dir/-/make-dir-3.1.0.tgz",
+      "integrity": "sha512-g3FeP20LNwhALb/6Cz6Dd4F2ngze0jz7tbzrD2wAV+o9FeNHe4rL+yK2md0J/fiSf1sa1ADhXqi5+oVwOM/eGw==",
+      "dependencies": {
+        "semver": "^6.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/@mapbox/node-pre-gyp/node_modules/make-dir/node_modules/semver": {
+      "version": "6.3.1",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.1.tgz",
+      "integrity": "sha512-BR7VvDCVHO+q2xBEWskxS6DJE1qRnb7DxzUrogb71CWoSficBxYsiAGd+Kl0mmq/MprG9yArRkyrQxTO6XjMzA==",
+      "bin": {
+        "semver": "bin/semver.js"
+      }
+    },
+    "node_modules/@mapbox/node-pre-gyp/node_modules/semver": {
+      "version": "7.7.3",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.7.3.tgz",
+      "integrity": "sha512-SdsKMrI9TdgjdweUSR9MweHA4EJ8YxHn8DFaDisvhVlUOe4BF1tLD7GAj0lIqWVl+dPb/rExr0Btby5loQm20Q==",
+      "bin": {
+        "semver": "bin/semver.js"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/@nodelib/fs.scandir": {
       "version": "2.1.5",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz",
@@ -1445,6 +1851,11 @@
         "npm": ">=7.0.0"
       }
     },
+    "node_modules/abbrev": {
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@@ -4380,6 +5063,27 @@
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@@ -4599,6 +5303,19 @@
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@@ -4738,6 +5454,25 @@
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@@ -4748,6 +5483,60 @@
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+          "url": "https://github.com/sponsors/feross"
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+          "url": "https://www.patreon.com/feross"
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+      "resolved": "https://registry.npmjs.org/is-arrayish/-/is-arrayish-0.3.4.tgz",
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@@ -4872,6 +5702,14 @@
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@@ -4973,6 +5809,27 @@
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@@ -5025,6 +5882,11 @@
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@@ -5136,6 +5998,11 @@
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@@ -5170,6 +6037,20 @@
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+    },
+    "node_modules/whatwg-url": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-5.0.0.tgz",
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@@ -5186,6 +6067,14 @@
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diff --git a/package.json b/package.json
index 11763ae..46879dd 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "gitlab-issue-discord-bot",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "description": "Bot Discord pour synchroniser les issue boards GitLab avec Discord",
   "main": "src/index.js",
   "scripts": {
@@ -10,19 +10,28 @@
     "lint": "eslint src/",
     "lint:fix": "eslint src/ --fix"
   },
-  "keywords": ["discord", "gitlab", "kanban", "bot", "issue-board"],
+  "keywords": [
+    "discord",
+    "gitlab",
+    "kanban",
+    "bot",
+    "issue-board"
+  ],
   "author": "Holo795",
   "license": "MIT",
   "dependencies": {
-    "discord.js": "^14.14.1",
     "axios": "^1.6.2",
+    "canvas": "^2.11.2",
+    "discord.js": "^14.14.1",
     "dotenv": "^16.3.1",
-    "node-cron": "^3.0.3"
+    "node-cron": "^3.0.3",
+    "pdfjs-dist": "^3.11.174",
+    "sharp": "^0.33.3"
   },
   "devDependencies": {
-    "nodemon": "^3.0.2",
     "eslint": "^8.56.0",
-    "jest": "^29.7.0"
+    "jest": "^29.7.0",
+    "nodemon": "^3.0.2"
   },
   "engines": {
     "node": ">=18.0.0"
diff --git a/src/commands/Commands.js b/src/commands/Commands.js
index e15550e..c53a4aa 100644
--- a/src/commands/Commands.js
+++ b/src/commands/Commands.js
@@ -2,6 +2,7 @@ const CommandDefinitions = require('./definitions/CommandDefinitions');
 const IssueInfoHandler = require('./handlers/IssueInfoHandler');
 const SyncHandler = require('./handlers/SyncHandler');
 const StatsHandler = require('./handlers/StatsHandler');
+const PdfHandler = require('./handlers/PdfHandler');
 const AutocompleteService = require('./autocomplete/AutocompleteService');
 
 /**
@@ -16,6 +17,7 @@ class Commands {
     this.issueInfoHandler = new IssueInfoHandler(gitlabClient, syncService);
     this.syncHandler = new SyncHandler(syncService);
     this.statsHandler = new StatsHandler(syncService);
+    this.pdfHandler = new PdfHandler();
     this.autocompleteService = new AutocompleteService(gitlabClient, syncService);
   }
 
@@ -47,6 +49,20 @@ class Commands {
     return await this.statsHandler.handle(interaction);
   }
 
+  /**
+   * Gère la commande de visualisation PDF
+   */
+  async handlePdf(interaction) {
+    return await this.pdfHandler.handle(interaction);
+  }
+
+  /**
+   * Gère les interactions bouton pour la navigation PDF
+   */
+  async handlePdfButton(interaction) {
+    return await this.pdfHandler.handleButton(interaction);
+  }
+
   /**
    * Gère l'auto-complétion pour les commandes
    */
diff --git a/src/commands/definitions/CommandDefinitions.js b/src/commands/definitions/CommandDefinitions.js
index f5834ab..209661b 100644
--- a/src/commands/definitions/CommandDefinitions.js
+++ b/src/commands/definitions/CommandDefinitions.js
@@ -11,7 +11,8 @@ class CommandDefinitions {
     return [
       this.getIssueInfoCommand(),
       this.getSyncCommand(),
-      this.getBotStatsCommand()
+      this.getBotStatsCommand(),
+      this.getPdfCommand()
     ];
   }
 
@@ -56,6 +57,27 @@ class CommandDefinitions {
       .setName('bot-stats')
       .setDescription('Affiche les statistiques du bot');
   }
+
+  /**
+   * Commande pour visualiser un PDF page par page
+   */
+  static getPdfCommand() {
+    return new SlashCommandBuilder()
+      .setName('pdf')
+      .setDescription('Visualise un PDF et navigue page par page')
+      .addAttachmentOption(option =>
+        option.setName('file')
+          .setDescription('PDF à afficher')
+          .setRequired(false))
+      .addStringOption(option =>
+        option.setName('url')
+          .setDescription('URL HTTP(S) vers un PDF')
+          .setRequired(false))
+      .addBooleanOption(option =>
+        option.setName('public')
+          .setDescription('Afficher pour tout le monde (sinon seulement pour toi)')
+          .setRequired(false));
+  }
 }
 
 module.exports = CommandDefinitions;
diff --git a/src/commands/handlers/PdfHandler.js b/src/commands/handlers/PdfHandler.js
new file mode 100644
index 0000000..9f2b819
--- /dev/null
+++ b/src/commands/handlers/PdfHandler.js
@@ -0,0 +1,227 @@
+const fs = require('fs');
+const os = require('os');
+const path = require('path');
+const axios = require('axios');
+const sharp = require('sharp');
+const { createCanvas } = require('canvas');
+const { EmbedBuilder, ActionRowBuilder, ButtonBuilder, ButtonStyle, AttachmentBuilder } = require('discord.js');
+const pdfjsLib = require('pdfjs-dist/legacy/build/pdf.js');
+const logger = require('../../utils/logger');
+
+/**
+ * Handler pour la commande /pdf
+ */
+class PdfHandler {
+  constructor() {
+    this.sessions = new Map(); // messageId -> { pdfPath, totalPages, ownerId, createdAt, downloadUrl, isPublic }
+    pdfjsLib.GlobalWorkerOptions.workerSrc = require('pdfjs-dist/build/pdf.worker.min.js');
+  }
+
+  /**
+   * Commande principale
+   */
+  async handle(interaction) {
+    try {
+      const attachment = interaction.options.getAttachment('file');
+      const urlOption = interaction.options.getString('url');
+      const isPublic = interaction.options.getBoolean('public') === true;
+
+      const sourceUrl = attachment ? attachment.url : urlOption;
+      if (!attachment && !urlOption) {
+        await interaction.editReply({ content: '❌ Fournis un PDF (fichier) ou une URL https:// vers un PDF.' });
+        return;
+      }
+
+      if (urlOption && !urlOption.toLowerCase().startsWith('http')) {
+        await interaction.editReply({ content: '❌ URL invalide. Utilise http(s)://...' });
+        return;
+      }
+
+      if (attachment && attachment.contentType && !attachment.contentType.includes('pdf')) {
+        await interaction.editReply({ content: '❌ Le fichier doit être un PDF.' });
+        return;
+      }
+
+      if (attachment && attachment.size > 15 * 1024 * 1024) {
+        await interaction.editReply({ content: '❌ PDF trop lourd (max 15 Mo).' });
+        return;
+      }
+
+      const tmpPath = await this.downloadPdf(sourceUrl);
+      const { pdf, totalPages } = await this.loadPdf(tmpPath);
+
+      if (totalPages > 100) {
+        await interaction.editReply({ content: '❌ PDF trop long (max 100 pages).' });
+        fs.unlink(tmpPath, () => {});
+        return;
+      }
+
+      const pageBuffer = await this.renderPage(pdf, 1);
+      const title = this.getPdfTitle(sourceUrl);
+      const messageOptions = this.buildMessageOptions(pageBuffer, 1, totalPages, interaction.user.id, sourceUrl, title);
+
+      // Visibilité du message (ephemeral si non public)
+      if (!isPublic) {
+        messageOptions.flags = require('discord.js').MessageFlags.Ephemeral;
+      }
+
+      const reply = await interaction.editReply(messageOptions);
+
+      // Sauvegarde de la session pour la navigation
+      this.sessions.set(reply.id, {
+        pdfPath: tmpPath,
+        totalPages,
+        ownerId: interaction.user.id,
+        createdAt: Date.now(),
+        downloadUrl: sourceUrl,
+        isPublic
+      });
+
+      logger.info(`PDF affiché (${totalPages} pages) par ${interaction.user.tag}`);
+
+    } catch (error) {
+      logger.error('Erreur lors du traitement du PDF:', error);
+      await interaction.editReply({ content: '❌ Erreur lors du traitement du PDF.' });
+    }
+  }
+
+  /**
+   * Gestion des boutons
+   */
+  async handleButton(interaction) {
+    const parts = (interaction.customId || '').split(':'); // pdf-nav:{userId}:{page}:{total}
+    if (parts.length !== 4) return;
+    const [, ownerId, pageStr, totalStr] = parts;
+    const requestedPage = parseInt(pageStr, 10);
+    const totalPages = parseInt(totalStr, 10);
+
+    const session = this.sessions.get(interaction.message.id);
+    if (!session) {
+      await interaction.reply({
+        content: '❌ Session expirée ou introuvable.',
+        flags: require('discord.js').MessageFlags.Ephemeral
+      });
+      return;
+    }
+
+    if (!session.isPublic && interaction.user.id !== ownerId) {
+      await interaction.reply({
+        content: '❌ Seul l’auteur de la commande peut naviguer.',
+        flags: require('discord.js').MessageFlags.Ephemeral
+      });
+      return;
+    }
+
+    const clampedPage = Math.min(Math.max(1, requestedPage), totalPages);
+    if (clampedPage === requestedPage && interaction.isRepliable()) {
+      await interaction.deferUpdate();
+    }
+
+    try {
+      const { pdf } = await this.loadPdf(session.pdfPath);
+      const pageBuffer = await this.renderPage(pdf, clampedPage);
+      const title = this.getPdfTitle(session.downloadUrl);
+      const messageOptions = this.buildMessageOptions(pageBuffer, clampedPage, totalPages, ownerId, session.downloadUrl, title);
+
+      await interaction.editReply(messageOptions);
+    } catch (error) {
+      logger.error('Erreur lors de la navigation PDF:', error);
+      await interaction.editReply({ content: '❌ Erreur lors du rendu de la page.' });
+    }
+  }
+
+  /**
+   * Télécharge le PDF dans un fichier temporaire
+   */
+  async downloadPdf(url) {
+    const response = await axios.get(url, { responseType: 'arraybuffer' });
+    const tmpPath = path.join(os.tmpdir(), `pdf-${Date.now()}-${Math.random().toString(36).slice(2)}.pdf`);
+    fs.writeFileSync(tmpPath, response.data);
+    return tmpPath;
+  }
+
+  /**
+   * Charge le PDF avec pdfjs
+   */
+  async loadPdf(pdfPath) {
+    const data = new Uint8Array(fs.readFileSync(pdfPath));
+    const loadingTask = pdfjsLib.getDocument({ data });
+    const pdf = await loadingTask.promise;
+    return { pdf, totalPages: pdf.numPages };
+  }
+
+  /**
+   * Rendu d'une page en buffer PNG
+   */
+  async renderPage(pdf, pageNumber) {
+    const page = await pdf.getPage(pageNumber);
+    const viewport = page.getViewport({ scale: 1.5 }); // Ajuster si besoin
+    const canvas = createCanvas(viewport.width, viewport.height);
+    const context = canvas.getContext('2d');
+
+    await page.render({
+      canvasContext: context,
+      viewport,
+    }).promise;
+
+    const buffer = canvas.toBuffer('image/png');
+    // Recompression légère pour réduire la taille
+    return sharp(buffer).png({ quality: 90 }).toBuffer();
+  }
+
+  /**
+   * Construit le message Discord avec image + boutons
+   */
+  buildMessageOptions(pageBuffer, pageIndex, totalPages, ownerId, downloadUrl, title) {
+    const file = new AttachmentBuilder(pageBuffer, { name: `page-${pageIndex}.png` });
+    const embed = new EmbedBuilder()
+      .setTitle(title || 'Visualisation PDF')
+      .setDescription(`Page ${pageIndex} / ${totalPages}`)
+      .setImage(`attachment://page-${pageIndex}.png`)
+      .setColor(0x5865F2);
+
+    const prevDisabled = pageIndex <= 1;
+    const nextDisabled = pageIndex >= totalPages;
+
+    const row = new ActionRowBuilder().addComponents(
+      new ButtonBuilder()
+        .setCustomId(`pdf-nav:${ownerId}:${pageIndex - 1}:${totalPages}`)
+        .setLabel('◀️ Précédent')
+        .setStyle(ButtonStyle.Primary)
+        .setDisabled(prevDisabled),
+      new ButtonBuilder()
+        .setCustomId(`pdf-nav:${ownerId}:${pageIndex + 1}:${totalPages}`)
+        .setLabel('Suivant ▶️')
+        .setStyle(ButtonStyle.Primary)
+        .setDisabled(nextDisabled),
+      new ButtonBuilder()
+        .setLabel('Télécharger PDF')
+        .setStyle(ButtonStyle.Link)
+        .setURL(downloadUrl || 'https://')
+    );
+
+    return {
+      embeds: [embed],
+      files: [file],
+      components: [row]
+    };
+  }
+
+  /**
+   * Déduit un titre à partir de l'URL du PDF
+   */
+  getPdfTitle(downloadUrl) {
+    try {
+      if (!downloadUrl) return 'Visualisation PDF';
+      const url = new URL(downloadUrl);
+      const pathname = url.pathname || '';
+      const name = pathname.split('/').filter(Boolean).pop();
+      if (name) return name;
+      return 'Visualisation PDF';
+    } catch (e) {
+      return 'Visualisation PDF';
+    }
+  }
+}
+
+module.exports = PdfHandler;
diff --git a/src/config/config.js b/src/config/config.js
index e86ef02..32767a6 100644
--- a/src/config/config.js
+++ b/src/config/config.js
@@ -51,11 +51,18 @@ const config = {
       }
       // Aucune configuration trouvée
       else {
-        throw new Error('Aucune configuration trouvée. Créez le fichier config/projects.json ou définissez les variables legacy (GITLAB_PROJECT_ID + DISCORD_CATEGORY_ID)');
+        if (process.env.ALLOW_NO_PROJECTS === 'true') {
+          console.log('Aucun projet configuré, mais ALLOW_NO_PROJECTS=true -> démarrage sans projets.');
+          this.projects = [];
+        } else {
+          throw new Error('Aucune configuration trouvée. Créez le fichier config/projects.json ou définissez les variables legacy (GITLAB_PROJECT_ID + DISCORD_CATEGORY_ID)');
+        }
       }
 
       // Validation des projets avant encoding
-      if (!this.projects || this.projects.length === 0) {
+      if ((!this.projects || this.projects.length === 0) && process.env.ALLOW_NO_PROJECTS === 'true') {
+        console.log('Avertissement: démarrage sans projet (ALLOW_NO_PROJECTS=true). Certaines fonctionnalités seront désactivées.');
+      } else if (!this.projects || this.projects.length === 0) {
         throw new Error('Aucun projet configuré');
       }
 
@@ -87,6 +94,9 @@ const config = {
 
     // Validation des projets
     if (this.projects.length === 0) {
+      if (process.env.ALLOW_NO_PROJECTS === 'true') {
+        return;
+      }
       throw new Error('Aucun projet configuré. Définissez PROJECTS_CONFIG ou les variables legacy.');
     }
 
diff --git a/src/index.js b/src/index.js
index a0959d9..3808497 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,3 +1,4 @@
+const { Client, GatewayIntentBits } = require('discord.js');
 const config = require('./config/config');
 const logger = require('./utils/logger');
 const SyncService = require('./services/SyncService');
@@ -39,10 +40,23 @@ class KanbanBot {
       // Démarrage du service de synchronisation
       await this.syncService.initialize();
 
-      // Initialisation des commandes Discord (récupère le client du premier projet)
+      // Initialisation des commandes Discord
       const firstProjectSync = Array.from(this.syncService.projectSyncs.values())[0];
       if (firstProjectSync && firstProjectSync.discordService.client) {
         await this.commandService.initialize(firstProjectSync.discordService.client);
+      } else if (process.env.ALLOW_NO_PROJECTS === 'true') {
+        logger.info('Aucun projet configuré : initialisation d\'un client Discord minimal pour les commandes.');
+        const commandOnlyClient = new Client({
+          intents: [GatewayIntentBits.Guilds]
+        });
+
+        await new Promise((resolve, reject) => {
+          commandOnlyClient.once('ready', () => resolve());
+          commandOnlyClient.on('error', reject);
+          commandOnlyClient.login(config.discord.token).catch(reject);
+        });
+
+        await this.commandService.initialize(commandOnlyClient);
       }
 
       this.isRunning = true;
diff --git a/src/services/CommandService.js b/src/services/CommandService.js
index 6831d12..060ad4b 100644
--- a/src/services/CommandService.js
+++ b/src/services/CommandService.js
@@ -69,6 +69,8 @@ class CommandService {
         await this.handleSlashCommand(interaction);
       } else if (interaction.isAutocomplete()) {
         await this.handleAutocomplete(interaction);
+      } else if (interaction.isButton()) {
+        await this.handleButton(interaction);
       }
     });
 
@@ -98,6 +100,10 @@ class CommandService {
           await this.commands.handleBotStats(interaction);
           break;
 
+        case 'pdf':
+          await this.commands.handlePdf(interaction);
+          break;
+
         default:
           await interaction.editReply({
             content: '❌ Commande non reconnue'
@@ -155,6 +161,28 @@ class CommandService {
       logger.error('Erreur lors de la suppression des commandes:', error);
     }
   }
+
+  /**
+   * Gère les interactions bouton
+   */
+  async handleButton(interaction) {
+    try {
+      const customId = interaction.customId || '';
+      if (customId.startsWith('pdf-nav:')) {
+        await this.commands.handlePdfButton(interaction);
+      }
+    } catch (error) {
+      logger.error('Erreur lors du traitement du bouton:', error);
+      try {
+        await interaction.reply({
+          content: '❌ Erreur lors du traitement du bouton',
+          flags: require('discord.js').MessageFlags.Ephemeral
+        });
+      } catch (replyError) {
+        logger.error('Erreur lors de la réponse à l\'interaction bouton:', replyError);
+      }
+    }
+  }
 }
 
 module.exports = CommandService;