Revert back to react-photo-album and improve FolderGallery

MUI ImageList loads images one after another, which leads to loading all
 images even with loading=lazy. Maybe it depends on the order in which
 images are loaded, but this issue never arose with react-photo-album

FolderGallery always displays folder icons in the same way and simply
 positions the image to cover the space available. This circumvents the
 issue of different aspect ratios of images.

picture-gallery-client/package-lock.json

@@ -18,6 +18,9 @@
         "@types/node": "^22.2.0",
         "@types/react": "^18.3.3",
         "@types/react-dom": "^18.3.0",
+        "@typescript-eslint/eslint-plugin": "8.0.1",
+        "@typescript-eslint/parser": "8.0.1",
+        "@vitejs/plugin-react": "^4.3.1",
         "cross-env": "^7.0.3",
         "dotenv": "^16.4.5",
         "eslint": "8.57.0",
@@ -30,24 +33,22 @@
         "eslint-plugin-react-hooks": "^4.6.2",
         "react": "^18.3.1",
         "react-dom": "^18.3.1",
+        "react-photo-album": "^3.0.1",
         "react-router-dom": "^6.26.0",
         "typescript": "^5.5.4",
+        "vite": "^5.4.0",
+        "vite-plugin-eslint": "^1.8.1",
+        "vite-tsconfig-paths": "^5.0.1",
         "web-vitals": "^4.2.3",
         "yet-another-react-lightbox": "^3.21.3"
       },
       "devDependencies": {
         "@testing-library/react": "^16.0.0",
         "@testing-library/user-event": "^14.5.2",
-        "@typescript-eslint/eslint-plugin": "8.0.1",
-        "@typescript-eslint/parser": "8.0.1",
-        "@vitejs/plugin-react": "^4.3.1",
         "@vitest/coverage-v8": "^2.0.5",
         "jsdom": "^24.1.1",
         "prettier": "^3.3.3",
         "ts-node": "^10.9.2",
-        "vite": "^5.4.0",
-        "vite-plugin-eslint": "^1.8.1",
-        "vite-tsconfig-paths": "^5.0.1",
         "vitest": "^2.0.5"
       }
     },
@@ -55,7 +56,6 @@
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/@ampproject/remapping/-/remapping-2.3.0.tgz",
       "integrity": "sha512-30iZtAPgz+LTIYoeivqYo853f02jBYSd5uGnGpkFV0M3xOt9aN73erkgYAmZU43x4VfqcnLxW9Kpg3R5LC4YYw==",
-      "dev": true,
       "dependencies": {
         "@jridgewell/gen-mapping": "^0.3.5",
         "@jridgewell/trace-mapping": "^0.3.24"
@@ -80,7 +80,6 @@
       "version": "7.25.2",
       "resolved": "https://registry.npmjs.org/@babel/compat-data/-/compat-data-7.25.2.tgz",
       "integrity": "sha512-bYcppcpKBvX4znYaPEeFau03bp89ShqNMLs+rmdptMw+heSZh9+z84d2YG+K7cYLbWwzdjtDoW/uqZmPjulClQ==",
-      "dev": true,
       "engines": {
         "node": ">=6.9.0"
       }
@@ -89,7 +88,6 @@
       "version": "7.25.2",
       "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.25.2.tgz",
       "integrity": "sha512-BBt3opiCOxUr9euZ5/ro/Xv8/V7yJ5bjYMqG/C1YAo8MIKAnumZalCN+msbci3Pigy4lIQfPUpfMM27HMGaYEA==",
-      "dev": true,
       "dependencies": {
         "@ampproject/remapping": "^2.2.0",
         "@babel/code-frame": "^7.24.7",
@@ -118,14 +116,12 @@
     "node_modules/@babel/core/node_modules/convert-source-map": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-2.0.0.tgz",
-      "integrity": "sha512-Kvp459HrV2FEJ1CAsi1Ku+MY3kasH19TFykTz2xWmMeq6bk2NU3XXvfJ+Q61m0xktWwt+1HSYf3JZsTms3aRJg==",
+      "integrity": "sha512-Kvp459HrV2FEJ1CAsi1Ku+MY3kasH19TFykTz2xWmMeq6bk2NU3XXvfJ+Q61m0xktWwt+1HSYf3JZsTms3aRJg=="
-      "dev": true
     },
     "node_modules/@babel/core/node_modules/semver": {
       "version": "6.3.1",
       "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.1.tgz",
       "integrity": "sha512-BR7VvDCVHO+q2xBEWskxS6DJE1qRnb7DxzUrogb71CWoSficBxYsiAGd+Kl0mmq/MprG9yArRkyrQxTO6XjMzA==",
-      "dev": true,
       "bin": {
         "semver": "bin/semver.js"
       }
@@ -148,7 +144,6 @@
       "version": "7.25.2",
       "resolved": "https://registry.npmjs.org/@babel/helper-compilation-targets/-/helper-compilation-targets-7.25.2.tgz",
       "integrity": "sha512-U2U5LsSaZ7TAt3cfaymQ8WHh0pxvdHoEk6HVpaexxixjyEquMh0L0YNJNM6CTGKMXV1iksi0iZkGw4AcFkPaaw==",
-      "dev": true,
       "dependencies": {
         "@babel/compat-data": "^7.25.2",
         "@babel/helper-validator-option": "^7.24.8",
@@ -164,7 +159,6 @@
       "version": "6.3.1",
       "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.1.tgz",
       "integrity": "sha512-BR7VvDCVHO+q2xBEWskxS6DJE1qRnb7DxzUrogb71CWoSficBxYsiAGd+Kl0mmq/MprG9yArRkyrQxTO6XjMzA==",
-      "dev": true,
       "bin": {
         "semver": "bin/semver.js"
       }
@@ -185,7 +179,6 @@
       "version": "7.25.2",
       "resolved": "https://registry.npmjs.org/@babel/helper-module-transforms/-/helper-module-transforms-7.25.2.tgz",
       "integrity": "sha512-BjyRAbix6j/wv83ftcVJmBt72QtHI56C7JXZoG2xATiLpmoC7dpd8WnkikExHDVPpi/3qCmO6WY1EaXOluiecQ==",
-      "dev": true,
       "dependencies": {
         "@babel/helper-module-imports": "^7.24.7",
         "@babel/helper-simple-access": "^7.24.7",
@@ -203,7 +196,6 @@
       "version": "7.24.8",
       "resolved": "https://registry.npmjs.org/@babel/helper-plugin-utils/-/helper-plugin-utils-7.24.8.tgz",
       "integrity": "sha512-FFWx5142D8h2Mgr/iPVGH5G7w6jDn4jUSpZTyDnQO0Yn7Ks2Kuz6Pci8H6MPCoUJegd/UZQ3tAvfLCxQSnWWwg==",
-      "dev": true,
       "engines": {
         "node": ">=6.9.0"
       }
@@ -212,7 +204,6 @@
       "version": "7.24.7",
       "resolved": "https://registry.npmjs.org/@babel/helper-simple-access/-/helper-simple-access-7.24.7.tgz",
       "integrity": "sha512-zBAIvbCMh5Ts+b86r/CjU+4XGYIs+R1j951gxI3KmmxBMhCg4oQMsv6ZXQ64XOm/cvzfU1FmoCyt6+owc5QMYg==",
-      "dev": true,
       "dependencies": {
         "@babel/traverse": "^7.24.7",
         "@babel/types": "^7.24.7"
@@ -241,7 +232,6 @@
       "version": "7.24.8",
       "resolved": "https://registry.npmjs.org/@babel/helper-validator-option/-/helper-validator-option-7.24.8.tgz",
       "integrity": "sha512-xb8t9tD1MHLungh/AIoWYN+gVHaB9kwlu8gffXGSt3FFEIT7RjS+xWbc2vUD1UTZdIpKj/ab3rdqJ7ufngyi2Q==",
-      "dev": true,
       "engines": {
         "node": ">=6.9.0"
       }
@@ -250,7 +240,6 @@
       "version": "7.25.0",
       "resolved": "https://registry.npmjs.org/@babel/helpers/-/helpers-7.25.0.tgz",
       "integrity": "sha512-MjgLZ42aCm0oGjJj8CtSM3DB8NOOf8h2l7DCTePJs29u+v7yO/RBX9nShlKMgFnRks/Q4tBAe7Hxnov9VkGwLw==",
-      "dev": true,
       "dependencies": {
         "@babel/template": "^7.25.0",
         "@babel/types": "^7.25.0"
@@ -291,7 +280,6 @@
       "version": "7.24.7",
       "resolved": "https://registry.npmjs.org/@babel/plugin-transform-react-jsx-self/-/plugin-transform-react-jsx-self-7.24.7.tgz",
       "integrity": "sha512-fOPQYbGSgH0HUp4UJO4sMBFjY6DuWq+2i8rixyUMb3CdGixs/gccURvYOAhajBdKDoGajFr3mUq5rH3phtkGzw==",
-      "dev": true,
       "dependencies": {
         "@babel/helper-plugin-utils": "^7.24.7"
       },
@@ -306,7 +294,6 @@
       "version": "7.24.7",
       "resolved": "https://registry.npmjs.org/@babel/plugin-transform-react-jsx-source/-/plugin-transform-react-jsx-source-7.24.7.tgz",
       "integrity": "sha512-J2z+MWzZHVOemyLweMqngXrgGC42jQ//R0KdxqkIz/OrbVIIlhFI3WigZ5fO+nwFvBlncr4MGapd8vTyc7RPNQ==",
-      "dev": true,
       "dependencies": {
         "@babel/helper-plugin-utils": "^7.24.7"
       },
@@ -539,7 +526,6 @@
       "cpu": [
         "ppc64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "aix"
@@ -555,7 +541,6 @@
       "cpu": [
         "arm"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "android"
@@ -571,7 +556,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "android"
@@ -587,7 +571,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "android"
@@ -603,7 +586,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "darwin"
@@ -619,7 +601,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "darwin"
@@ -635,7 +616,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "freebsd"
@@ -651,7 +631,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "freebsd"
@@ -667,7 +646,6 @@
       "cpu": [
         "arm"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -683,7 +661,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -699,7 +676,6 @@
       "cpu": [
         "ia32"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -715,7 +691,6 @@
       "cpu": [
         "loong64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -731,7 +706,6 @@
       "cpu": [
         "mips64el"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -747,7 +721,6 @@
       "cpu": [
         "ppc64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -763,7 +736,6 @@
       "cpu": [
         "riscv64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -779,7 +751,6 @@
       "cpu": [
         "s390x"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -795,7 +766,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -811,7 +781,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "netbsd"
@@ -827,7 +796,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "openbsd"
@@ -843,7 +811,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "sunos"
@@ -859,7 +826,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "win32"
@@ -875,7 +841,6 @@
       "cpu": [
         "ia32"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "win32"
@@ -891,7 +856,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "win32"
@@ -1592,7 +1556,6 @@
       "version": "4.2.1",
       "resolved": "https://registry.npmjs.org/@rollup/pluginutils/-/pluginutils-4.2.1.tgz",
       "integrity": "sha512-iKnFXr7NkdZAIHiIWE+BX5ULi/ucVFYWD6TbAV+rZctiRTY2PL6tsIKhoIOaoskiWAkgu+VsbXgUVDNLHf+InQ==",
-      "dev": true,
       "dependencies": {
         "estree-walker": "^2.0.1",
         "picomatch": "^2.2.2"
@@ -1608,7 +1571,6 @@
       "cpu": [
         "arm"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "android"
@@ -1621,7 +1583,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "android"
@@ -1634,7 +1595,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "darwin"
@@ -1647,7 +1607,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "darwin"
@@ -1660,7 +1619,6 @@
       "cpu": [
         "arm"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -1673,7 +1631,6 @@
       "cpu": [
         "arm"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -1686,7 +1643,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -1699,7 +1655,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -1712,7 +1667,6 @@
       "cpu": [
         "ppc64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -1725,7 +1679,6 @@
       "cpu": [
         "riscv64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -1738,7 +1691,6 @@
       "cpu": [
         "s390x"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -1751,7 +1703,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -1764,7 +1715,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "linux"
@@ -1777,7 +1727,6 @@
       "cpu": [
         "arm64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "win32"
@@ -1790,7 +1739,6 @@
       "cpu": [
         "ia32"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "win32"
@@ -1803,7 +1751,6 @@
       "cpu": [
         "x64"
       ],
-      "dev": true,
       "optional": true,
       "os": [
         "win32"
@@ -1980,7 +1927,6 @@
       "version": "7.20.5",
       "resolved": "https://registry.npmjs.org/@types/babel__core/-/babel__core-7.20.5.tgz",
       "integrity": "sha512-qoQprZvz5wQFJwMDqeseRXWv3rqMvhgpbXFfVyWhbx9X47POIA6i/+dXefEmZKoAgOaTdaIgNSMqMIU61yRyzA==",
-      "dev": true,
       "dependencies": {
         "@babel/parser": "^7.20.7",
         "@babel/types": "^7.20.7",
@@ -1993,7 +1939,6 @@
       "version": "7.6.8",
       "resolved": "https://registry.npmjs.org/@types/babel__generator/-/babel__generator-7.6.8.tgz",
       "integrity": "sha512-ASsj+tpEDsEiFr1arWrlN6V3mdfjRMZt6LtK/Vp/kreFLnr5QH5+DhvD5nINYZXzwJvXeGq+05iUXcAzVrqWtw==",
-      "dev": true,
       "dependencies": {
         "@babel/types": "^7.0.0"
       }
@@ -2002,7 +1947,6 @@
       "version": "7.4.4",
       "resolved": "https://registry.npmjs.org/@types/babel__template/-/babel__template-7.4.4.tgz",
       "integrity": "sha512-h/NUaSyG5EyxBIp8YRxo4RMe2/qQgvyowRwVMzhYhBCONbW8PUsg4lkFMrhgZhUe5z3L3MiLDuvyJ/CaPa2A8A==",
-      "dev": true,
       "dependencies": {
         "@babel/parser": "^7.1.0",
         "@babel/types": "^7.0.0"
@@ -2012,7 +1956,6 @@
       "version": "7.20.6",
       "resolved": "https://registry.npmjs.org/@types/babel__traverse/-/babel__traverse-7.20.6.tgz",
       "integrity": "sha512-r1bzfrm0tomOI8g1SzvCaQHo6Lcv6zu0EA+W2kHrt8dyrHQxGzBBL4kdkzIS+jBMV+EYcMAEAqXqYaLJq5rOZg==",
-      "dev": true,
       "dependencies": {
         "@babel/types": "^7.20.7"
       }
@@ -2021,7 +1964,6 @@
       "version": "8.56.11",
       "resolved": "https://registry.npmjs.org/@types/eslint/-/eslint-8.56.11.tgz",
       "integrity": "sha512-sVBpJMf7UPo/wGecYOpk2aQya2VUGeHhe38WG7/mN5FufNSubf5VT9Uh9Uyp8/eLJpu1/tuhJ/qTo4mhSB4V4Q==",
-      "devOptional": true,
       "dependencies": {
         "@types/estree": "*",
         "@types/json-schema": "*"
@@ -2030,14 +1972,12 @@
     "node_modules/@types/estree": {
       "version": "1.0.5",
       "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.5.tgz",
-      "integrity": "sha512-/kYRxGDLWzHOB7q+wtSUQlFrtcdUccpfy+X+9iMBpHK8QLLhx2wIPYuS5DYtR9Wa/YlZAbIovy7qVdB1Aq6Lyw==",
+      "integrity": "sha512-/kYRxGDLWzHOB7q+wtSUQlFrtcdUccpfy+X+9iMBpHK8QLLhx2wIPYuS5DYtR9Wa/YlZAbIovy7qVdB1Aq6Lyw=="
-      "devOptional": true
     },
     "node_modules/@types/json-schema": {
       "version": "7.0.15",
       "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.15.tgz",
-      "integrity": "sha512-5+fP8P8MFNC+AyZCDxrB2pkZFPGzqQWUzpSeuuVLvm8VMcorNYavBqoFcxK8bQz4Qsbn4oUEEem4wDLfcysGHA==",
+      "integrity": "sha512-5+fP8P8MFNC+AyZCDxrB2pkZFPGzqQWUzpSeuuVLvm8VMcorNYavBqoFcxK8bQz4Qsbn4oUEEem4wDLfcysGHA=="
-      "devOptional": true
     },
     "node_modules/@types/json5": {
       "version": "0.0.29",
@@ -2091,7 +2031,6 @@
       "version": "8.0.1",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.0.1.tgz",
       "integrity": "sha512-5g3Y7GDFsJAnY4Yhvk8sZtFfV6YNF2caLzjrRPUBzewjPCaj0yokePB4LJSobyCzGMzjZZYFbwuzbfDHlimXbQ==",
-      "dev": true,
       "dependencies": {
         "@eslint-community/regexpp": "^4.10.0",
         "@typescript-eslint/scope-manager": "8.0.1",
@@ -2124,7 +2063,6 @@
       "version": "8.0.1",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/parser/-/parser-8.0.1.tgz",
       "integrity": "sha512-5IgYJ9EO/12pOUwiBKFkpU7rS3IU21mtXzB81TNwq2xEybcmAZrE9qwDtsb5uQd9aVO9o0fdabFyAmKveXyujg==",
-      "dev": true,
       "dependencies": {
         "@typescript-eslint/scope-manager": "8.0.1",
         "@typescript-eslint/types": "8.0.1",
@@ -2152,7 +2090,6 @@
       "version": "8.0.1",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-8.0.1.tgz",
       "integrity": "sha512-NpixInP5dm7uukMiRyiHjRKkom5RIFA4dfiHvalanD2cF0CLUuQqxfg8PtEUo9yqJI2bBhF+pcSafqnG3UBnRQ==",
-      "dev": true,
       "dependencies": {
         "@typescript-eslint/types": "8.0.1",
         "@typescript-eslint/visitor-keys": "8.0.1"
@@ -2169,7 +2106,6 @@
       "version": "8.0.1",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/type-utils/-/type-utils-8.0.1.tgz",
       "integrity": "sha512-+/UT25MWvXeDX9YaHv1IS6KI1fiuTto43WprE7pgSMswHbn1Jm9GEM4Txp+X74ifOWV8emu2AWcbLhpJAvD5Ng==",
-      "dev": true,
       "dependencies": {
         "@typescript-eslint/typescript-estree": "8.0.1",
         "@typescript-eslint/utils": "8.0.1",
@@ -2193,7 +2129,6 @@
       "version": "8.0.1",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-8.0.1.tgz",
       "integrity": "sha512-PpqTVT3yCA/bIgJ12czBuE3iBlM3g4inRSC5J0QOdQFAn07TYrYEQBBKgXH1lQpglup+Zy6c1fxuwTk4MTNKIw==",
-      "dev": true,
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
       },
@@ -2206,7 +2141,6 @@
       "version": "8.0.1",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-8.0.1.tgz",
       "integrity": "sha512-8V9hriRvZQXPWU3bbiUV4Epo7EvgM6RTs+sUmxp5G//dBGy402S7Fx0W0QkB2fb4obCF8SInoUzvTYtc3bkb5w==",
-      "dev": true,
       "dependencies": {
         "@typescript-eslint/types": "8.0.1",
         "@typescript-eslint/visitor-keys": "8.0.1",
@@ -2234,7 +2168,6 @@
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.0.1.tgz",
       "integrity": "sha512-XnAIvQ8eM+kC6aULx6wuQiwVsnzsi9d3WxzV3FpWTGA19F621kwdbsAcFKXgKUHZWsy+mY6iL1sHTxWEFCytDA==",
-      "dev": true,
       "dependencies": {
         "balanced-match": "^1.0.0"
       }
@@ -2243,7 +2176,6 @@
       "version": "9.0.5",
       "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-9.0.5.tgz",
       "integrity": "sha512-G6T0ZX48xgozx7587koeX9Ys2NYy6Gmv//P89sEte9V9whIapMNF4idKxnW2QtCcLiTWlb/wfCabAtAFWhhBow==",
-      "dev": true,
       "dependencies": {
         "brace-expansion": "^2.0.1"
       },
@@ -2258,7 +2190,6 @@
       "version": "8.0.1",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/utils/-/utils-8.0.1.tgz",
       "integrity": "sha512-CBFR0G0sCt0+fzfnKaciu9IBsKvEKYwN9UZ+eeogK1fYHg4Qxk1yf/wLQkLXlq8wbU2dFlgAesxt8Gi76E8RTA==",
-      "dev": true,
       "dependencies": {
         "@eslint-community/eslint-utils": "^4.4.0",
         "@typescript-eslint/scope-manager": "8.0.1",
@@ -2280,7 +2211,6 @@
       "version": "8.0.1",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-8.0.1.tgz",
       "integrity": "sha512-W5E+o0UfUcK5EgchLZsyVWqARmsM7v54/qEq6PY3YI5arkgmCzHiuk0zKSJJbm71V0xdRna4BGomkCTXz2/LkQ==",
-      "dev": true,
       "dependencies": {
         "@typescript-eslint/types": "8.0.1",
         "eslint-visitor-keys": "^3.4.3"
@@ -2302,7 +2232,6 @@
       "version": "4.3.1",
       "resolved": "https://registry.npmjs.org/@vitejs/plugin-react/-/plugin-react-4.3.1.tgz",
       "integrity": "sha512-m/V2syj5CuVnaxcUJOQRel/Wr31FFXRFlnOoq1TVtkCxsY5veGMTEmpWHndrhB2U8ScHtCQB1e+4hWYExQc6Lg==",
-      "dev": true,
       "dependencies": {
         "@babel/core": "^7.24.5",
         "@babel/plugin-transform-react-jsx-self": "^7.24.5",
@@ -2581,7 +2510,6 @@
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/array-union/-/array-union-2.1.0.tgz",
       "integrity": "sha512-HGyxoOTYUyCM6stUe6EJgnd4EoewAI7zMdfqO+kGjnlZmBDz/cR5pf8r/cR4Wq60sL/p0IkcjUEEPwS3GFrIyw==",
-      "dev": true,
       "engines": {
         "node": ">=8"
       }
@@ -2798,7 +2726,6 @@
       "version": "4.23.3",
       "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.23.3.tgz",
       "integrity": "sha512-btwCFJVjI4YWDNfau8RhZ+B1Q/VLoUITrm3RlP6y1tYGWIOa+InuYiRGXUBXo8nA1qKmHMyLB/iVQg5TT4eFoA==",
-      "dev": true,
       "funding": [
         {
           "type": "opencollective",
@@ -2865,7 +2792,6 @@
       "version": "1.0.30001651",
       "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001651.tgz",
       "integrity": "sha512-9Cf+Xv1jJNe1xPZLGuUXLNkE1BoDkqRqYyFJ9TDYSqhduqA4hu4oR9HluGoWYQC/aj8WHjsGVV+bwkh0+tegRg==",
-      "dev": true,
       "funding": [
         {
           "type": "opencollective",
@@ -3283,7 +3209,6 @@
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/dir-glob/-/dir-glob-3.0.1.tgz",
       "integrity": "sha512-WkrWp9GR4KXfKGYzOLmTuGVi1UWFfws377n9cc55/tb6DuqyF6pcQ5AbiHEshaDpY9v6oaSr2XCDidGmMwdzIA==",
-      "dev": true,
       "dependencies": {
         "path-type": "^4.0.0"
       },
@@ -3337,8 +3262,7 @@
     "node_modules/electron-to-chromium": {
       "version": "1.5.6",
       "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.5.6.tgz",
-      "integrity": "sha512-jwXWsM5RPf6j9dPYzaorcBSUg6AiqocPEyMpkchkvntaH9HGfOOMZwxMJjDY/XEs3T5dM7uyH1VhRMkqUU9qVw==",
+      "integrity": "sha512-jwXWsM5RPf6j9dPYzaorcBSUg6AiqocPEyMpkchkvntaH9HGfOOMZwxMJjDY/XEs3T5dM7uyH1VhRMkqUU9qVw=="
-      "dev": true
     },
     "node_modules/emoji-regex": {
       "version": "9.2.2",
@@ -3550,7 +3474,6 @@
       "version": "0.21.5",
       "resolved": "https://registry.npmjs.org/esbuild/-/esbuild-0.21.5.tgz",
       "integrity": "sha512-mg3OPMV4hXywwpoDxu3Qda5xCKQi+vCTZq8S9J/EpkhB2HzKXq4SNFZE3+NK93JYxc8VMSep+lOUSC/RVKaBqw==",
-      "dev": true,
       "hasInstallScript": true,
       "bin": {
         "esbuild": "bin/esbuild"
@@ -3588,7 +3511,6 @@
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/escalade/-/escalade-3.1.2.tgz",
       "integrity": "sha512-ErCHMCae19vR8vQGe50xIsVomy19rg6gFu3+r3jkEO46suLMWBksvVyoGgQV+jOfl84ZSOSlmv6Gxa89PmTGmA==",
-      "dev": true,
       "engines": {
         "node": ">=6"
       }
@@ -4099,8 +4021,7 @@
     "node_modules/estree-walker": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/estree-walker/-/estree-walker-2.0.2.tgz",
-      "integrity": "sha512-Rfkk/Mp/DL7JVje3u18FxFujQlTNR2q6QfMSMB7AvCBx91NGj/ba3kCfza0f6dVDbw7YlRf/nDrn7pQrCCyQ/w==",
+      "integrity": "sha512-Rfkk/Mp/DL7JVje3u18FxFujQlTNR2q6QfMSMB7AvCBx91NGj/ba3kCfza0f6dVDbw7YlRf/nDrn7pQrCCyQ/w=="
-      "dev": true
     },
     "node_modules/esutils": {
       "version": "2.0.3",
@@ -4327,7 +4248,6 @@
       "version": "1.0.0-beta.2",
       "resolved": "https://registry.npmjs.org/gensync/-/gensync-1.0.0-beta.2.tgz",
       "integrity": "sha512-3hN7NaskYvMDLQY55gnW3NQ+mesEAepTqlg+VEbj7zzqEMBVNhzcGYYeqFo/TlYz6eQiFcp1HcsCZO+nGgS8zg==",
-      "dev": true,
       "engines": {
         "node": ">=6.9.0"
       }
@@ -4444,7 +4364,6 @@
       "version": "11.1.0",
       "resolved": "https://registry.npmjs.org/globby/-/globby-11.1.0.tgz",
       "integrity": "sha512-jhIXaOzy1sb8IyocaruWSn1TjmnBVs8Ayhcy83rmxNJ8q2uWKCAj3CnJY+KpGSXCueAPc0i05kVvVKtP1t9S3g==",
-      "dev": true,
       "dependencies": {
         "array-union": "^2.1.0",
         "dir-glob": "^3.0.1",
@@ -4463,8 +4382,7 @@
     "node_modules/globrex": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/globrex/-/globrex-0.1.2.tgz",
-      "integrity": "sha512-uHJgbwAMwNFf5mLst7IWLNg14x1CkeqglJb/K3doi4dw6q2IvAAmM/Y81kevy83wP+Sst+nutFTYOGg3d1lsxg==",
+      "integrity": "sha512-uHJgbwAMwNFf5mLst7IWLNg14x1CkeqglJb/K3doi4dw6q2IvAAmM/Y81kevy83wP+Sst+nutFTYOGg3d1lsxg=="
-      "dev": true
     },
     "node_modules/gopd": {
       "version": "1.0.1",
@@ -5258,7 +5176,6 @@
       "version": "2.2.3",
       "resolved": "https://registry.npmjs.org/json5/-/json5-2.2.3.tgz",
       "integrity": "sha512-XmOWe7eyHYH14cLdVPoyg+GOH3rYX++KpzrylJwSW98t3Nk+U8XOl8FWKOgwtzdb8lXGf6zYwDUzeHMWfxasyg==",
-      "dev": true,
       "bin": {
         "json5": "lib/cli.js"
       },
@@ -5364,7 +5281,6 @@
       "version": "5.1.1",
       "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-5.1.1.tgz",
       "integrity": "sha512-KpNARQA3Iwv+jTA0utUVVbrh+Jlrr1Fv0e56GGzAFOXN7dk/FviaDW8LHmK52DlcH4WP2n6gI8vN1aesBFgo9w==",
-      "dev": true,
       "dependencies": {
         "yallist": "^3.0.2"
       }
@@ -5502,7 +5418,6 @@
       "version": "3.3.7",
       "resolved": "https://registry.npmjs.org/nanoid/-/nanoid-3.3.7.tgz",
       "integrity": "sha512-eSRppjcPIatRIMC1U6UngP8XFcz8MQWGQdt1MTBQ7NaAmvXDfvNxbvWV3x2y6CdEUciCSsDHDQZbhYaB8QEo2g==",
-      "dev": true,
       "funding": [
         {
           "type": "github",
@@ -5524,8 +5439,7 @@
     "node_modules/node-releases": {
       "version": "2.0.18",
       "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-2.0.18.tgz",
-      "integrity": "sha512-d9VeXT4SJ7ZeOqGX6R5EM022wpL+eWPooLI+5UpWn2jCT1aosUQEhQP214x33Wkwx3JQMvIm+tIoVOdodFS40g==",
+      "integrity": "sha512-d9VeXT4SJ7ZeOqGX6R5EM022wpL+eWPooLI+5UpWn2jCT1aosUQEhQP214x33Wkwx3JQMvIm+tIoVOdodFS40g=="
-      "dev": true
     },
     "node_modules/normalize-path": {
       "version": "3.0.0",
@@ -5867,7 +5781,6 @@
       "version": "8.4.41",
       "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.41.tgz",
       "integrity": "sha512-TesUflQ0WKZqAvg52PWL6kHgLKP6xB6heTOdoYM0Wt2UHyxNa4K25EZZMgKns3BH1RLVbZCREPpLY0rhnNoHVQ==",
-      "dev": true,
       "funding": [
         {
           "type": "opencollective",
@@ -6049,11 +5962,27 @@
       "resolved": "https://registry.npmjs.org/react-is/-/react-is-18.3.1.tgz",
       "integrity": "sha512-/LLMVyas0ljjAtoYiPqYiL8VWXzUUdThrmU5+n20DZv+a+ClRoevUzw5JxU+Ieh5/c87ytoTBV9G1FiKfNJdmg=="
     },
+    "node_modules/react-photo-album": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/react-photo-album/-/react-photo-album-3.0.1.tgz",
+      "integrity": "sha512-yk3FJAuQn8UPZufbdYURa1wy+3tVVNaflyMOQ0mC8dlAWbDhlLDWJ0oGKSbbZkHMX7L3SGRIyWieix++AlD+TQ==",
+      "engines": {
+        "node": ">=18"
+      },
+      "peerDependencies": {
+        "@types/react": ">=18",
+        "react": ">=18"
+      },
+      "peerDependenciesMeta": {
+        "@types/react": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/react-refresh": {
       "version": "0.14.2",
       "resolved": "https://registry.npmjs.org/react-refresh/-/react-refresh-0.14.2.tgz",
       "integrity": "sha512-jCvmsr+1IUSMUyzOkRcvnVbX3ZYC6g9TDrDbFuFmRDq7PD4yaGbLKNQL6k2jnArV8hjYxh7hVhAZB6s9HDGpZA==",
-      "dev": true,
       "engines": {
         "node": ">=0.10.0"
       }
@@ -6222,7 +6151,6 @@
       "version": "4.20.0",
       "resolved": "https://registry.npmjs.org/rollup/-/rollup-4.20.0.tgz",
       "integrity": "sha512-6rbWBChcnSGzIlXeIdNIZTopKYad8ZG8ajhl78lGRLsI2rX8IkaotQhVas2Ma+GPxJav19wrSzvRvuiv0YKzWw==",
-      "dev": true,
       "dependencies": {
         "@types/estree": "1.0.5"
       },
@@ -6363,7 +6291,6 @@
       "version": "7.6.3",
       "resolved": "https://registry.npmjs.org/semver/-/semver-7.6.3.tgz",
       "integrity": "sha512-oVekP1cKtI+CTDvHWYFUcMtsK/00wmAEfyqKfNdARm8u1wNVhSgaX7A8d4UuIlUI5e84iEwOhs7ZPYRmzU9U6A==",
-      "dev": true,
       "bin": {
         "semver": "bin/semver.js"
       },
@@ -6455,7 +6382,6 @@
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/slash/-/slash-3.0.0.tgz",
       "integrity": "sha512-g9Q1haeby36OSStwb4ntCGGGaKsaVSjQ68fBxoQcutl5fS1vuY18H3wSt3jFyFtrkx+Kz0V1G85A4MyAdDMi2Q==",
-      "dev": true,
       "engines": {
         "node": ">=8"
       }
@@ -6472,7 +6398,6 @@
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.2.0.tgz",
       "integrity": "sha512-itJW8lvSA0TXEphiRoawsCksnlf8SyvmFzIhltqAHluXd88pkCd+cXJVHTDwdCr0IzwptSm035IHQktUu1QUMg==",
-      "dev": true,
       "engines": {
         "node": ">=0.10.0"
       }
@@ -6899,7 +6824,6 @@
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/ts-api-utils/-/ts-api-utils-1.3.0.tgz",
       "integrity": "sha512-UQMIo7pb8WRomKR1/+MFVLTroIvDVtMX3K6OUir8ynLyzB8Jeriont2bTAtmNPa1ekAgN7YPDyf6V+ygrdU+eQ==",
-      "dev": true,
       "engines": {
         "node": ">=16"
       },
@@ -6954,7 +6878,6 @@
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/tsconfck/-/tsconfck-3.1.1.tgz",
       "integrity": "sha512-00eoI6WY57SvZEVjm13stEVE90VkEdJAFGgpFLTsZbJyW/LwFQ7uQxJHWpZ2hzSWgCPKc9AnBnNP+0X7o3hAmQ==",
-      "dev": true,
       "bin": {
         "tsconfck": "bin/tsconfck.js"
       },
@@ -7143,7 +7066,6 @@
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/update-browserslist-db/-/update-browserslist-db-1.1.0.tgz",
       "integrity": "sha512-EdRAaAyk2cUE1wOf2DkEhzxqOQvFOoRJFNS6NeyJ01Gp2beMRpBAINjM2iDXE3KCuKhwnvHIQCJm6ThL2Z+HzQ==",
-      "dev": true,
       "funding": [
         {
           "type": "opencollective",
@@ -7197,7 +7119,6 @@
       "version": "5.4.0",
       "resolved": "https://registry.npmjs.org/vite/-/vite-5.4.0.tgz",
       "integrity": "sha512-5xokfMX0PIiwCMCMb9ZJcMyh5wbBun0zUzKib+L65vAZ8GY9ePZMXxFrHbr/Kyll2+LSCY7xtERPpxkBDKngwg==",
-      "dev": true,
       "dependencies": {
         "esbuild": "^0.21.3",
         "postcss": "^8.4.40",
@@ -7278,7 +7199,6 @@
       "version": "1.8.1",
       "resolved": "https://registry.npmjs.org/vite-plugin-eslint/-/vite-plugin-eslint-1.8.1.tgz",
       "integrity": "sha512-PqdMf3Y2fLO9FsNPmMX+//2BF5SF8nEWspZdgl4kSt7UvHDRHVVfHvxsD7ULYzZrJDGRxR81Nq7TOFgwMnUang==",
-      "dev": true,
       "dependencies": {
         "@rollup/pluginutils": "^4.2.1",
         "@types/eslint": "^8.4.5",
@@ -7293,7 +7213,6 @@
       "version": "2.79.1",
       "resolved": "https://registry.npmjs.org/rollup/-/rollup-2.79.1.tgz",
       "integrity": "sha512-uKxbd0IhMZOhjAiD5oAFp7BqvkA4Dv47qpOCtaNvng4HBwdbWtdOh8f5nZNuk2rp51PMGk3bzfWu5oayNEuYnw==",
-      "dev": true,
       "bin": {
         "rollup": "dist/bin/rollup"
       },
@@ -7308,7 +7227,6 @@
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/vite-tsconfig-paths/-/vite-tsconfig-paths-5.0.1.tgz",
       "integrity": "sha512-yqwv+LstU7NwPeNqajZzLEBVpUFU6Dugtb2P84FXuvaoYA+/70l9MHE+GYfYAycVyPSDYZ7mjOFuYBRqlEpTig==",
-      "dev": true,
       "dependencies": {
         "debug": "^4.1.1",
         "globrex": "^0.1.2",
@@ -7798,8 +7716,7 @@
     "node_modules/yallist": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
-      "integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g==",
+      "integrity": "sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g=="
-      "dev": true
     },
     "node_modules/yaml": {
       "version": "1.10.2",

picture-gallery-client/package.json

@@ -42,6 +42,7 @@
     "eslint-plugin-react-hooks": "^4.6.2",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
+    "react-photo-album": "^3.0.1",
     "react-router-dom": "^6.26.0",
     "typescript": "^5.5.4",
     "vite": "^5.4.0",

picture-gallery-client/src/ImageGallery/FolderGallery.tsx

@@ -1,58 +1,87 @@
 import React from "react";
-import { FolderPreview } from "./models";
+import { FolderPreview, ImageWithThumbnail } from "./models";
-import { useColumns } from "../util/responsive";
-import {
-  Chip,
-  ImageList,
-  ImageListItem,
-  ImageListItemBar,
-} from "@mui/material";
 import { Link } from "react-router-dom";
+import Typography from "@mui/material/Typography";
+
+import { ColumnsPhotoAlbum } from "react-photo-album";
+import "react-photo-album/columns.css";
+
+export interface PhotoWithFolder extends ImageWithThumbnail {
+  folderPreview: FolderPreview;
+}
+
+const PreviewFolder = ({ folder }: { folder: FolderPreview }) => {
+  return (
+    <img
+      src={folder.imagePreview.src}
+      alt={folder.name}
+      loading="lazy"
+      style={{
+        objectFit: "cover",
+        width: "100%",
+        height: "100%",
+        clipPath: "url(#folderPath)",
+      }}
+    />
+  );
+};
 
 export const FolderGallery = ({ folders }: { folders: FolderPreview[] }) => {
-  const columns = useColumns();
+  // hard
+  const foldersAsImages: PhotoWithFolder[] = folders.map((f) => ({
+    ...f.imagePreview,
+    href: f.fullPath,
+    folderPreview: f,
+    // hardcode width and height, so that the aspect ratio looks good for a folder icon
+    // the image is put in place with `object-fit: "cover"`
+    width: 290,
+    height: 230,
+  }));
 
   return (
     <>
-      <ImageList cols={columns} gap={8} style={{ overflowY: "initial" }}>
+      <ColumnsPhotoAlbum
-        {folders.map((folder) => (
+        photos={foldersAsImages}
-          <ImageListItem key={folder.fullPath}>
+        render={{
-            {/* Link and image styling taken from https://github.com/mui/material-ui/issues/22597 */}
+          image: (props, context) => (
-            <Link
+            <PreviewFolder folder={context.photo.folderPreview} />
-              to={folder.fullPath}
+          ),
-              style={{ display: "block", height: "100%" }}
+          link: (props, context) => {
-            >
+            return (
-              <img
+              <Link
-                src={folder.imagePreviewSrc}
+                to={context.photo.href!}
-                alt={folder.name}
+                {...props}
-                loading="lazy"
                 style={{
-                  objectFit: "cover",
+                  // TODO: how to fix `react/prop-types`
-                  width: "100%",
+                  // eslint-disable-next-line react/prop-types
-                  height: "100%",
+                  ...props.style,
-                  clipPath: "url(#folderPath)",
+                  height: context.height,
                 }}
               />
-              <ImageListItemBar
+            );
-                title={folder.name}
+          },
-                actionIcon={
+          extras: (props, context) => (
-                  <Chip
+            <div
-                    label={folder.numberOfFiles}
+              style={{
-                    size="small"
+                width: "100%",
-                    sx={{
+                color: "#fff",
-                      color: "white",
+                backgroundColor: "rgba(0, 0, 0, 0.5)",
-                      backgroundColor: "rgba(255, 255, 255, 0.24);",
+                position: "absolute",
-                      marginRight: 1,
+                top: "50%",
-                    }}
+                transform: "translateY(-50%)",
-                  />
+                padding: "10px 0px 10px 0px",
-                }
+                pointerEvents: "none",
-              />
+              }}
-            </Link>
+            >
-          </ImageListItem>
+              <Typography noWrap style={{ textAlign: "center" }}>
-        ))}
+                {context.photo.folderPreview.name}
-      </ImageList>
+              </Typography>
-      {/* External svg does not seem to work (anymore?) */}
+            </div>
-      {/* see for example https://codepen.io/imohkay/pen/GJpxXY */}
+          ),
+        }}
+      />
+      {/* External SVG is not supported, except in Firefox. See https://caniuse.com/css-clip-path */}
+      {/* See for example https://codepen.io/imohkay/pen/GJpxXY */}
       <svg
         height={0}
         width={0}

picture-gallery-client/src/ImageGallery/ImageGallery.tsx

@@ -1,33 +1,32 @@
 import React, { useState } from "react";
 import { ImageWithThumbnail } from "./models";
+
 import { Lightbox } from "yet-another-react-lightbox";
 import "yet-another-react-lightbox/styles.css";
 
 import Fullscreen from "yet-another-react-lightbox/plugins/fullscreen";
 import Slideshow from "yet-another-react-lightbox/plugins/slideshow";
 import Thumbnails from "yet-another-react-lightbox/plugins/thumbnails";
-import "yet-another-react-lightbox/plugins/thumbnails.css";
 import Zoom from "yet-another-react-lightbox/plugins/zoom";
-import { ImageList, ImageListItem } from "@mui/material";
+import "yet-another-react-lightbox/plugins/thumbnails.css";
-import { useColumns } from "../util/responsive";
+
+import { MasonryPhotoAlbum } from "react-photo-album";
+import "react-photo-album/masonry.css";
 
 export const ImageGallery = ({ images }: { images: ImageWithThumbnail[] }) => {
   const [index, setIndex] = useState(-1);
-  const columns = useColumns();
 
   return (
     <>
-      <ImageList variant="masonry" cols={columns} gap={8}>
+      <MasonryPhotoAlbum
-        {images.map((item, index) => (
+        photos={images}
-          <ImageListItem key={item.thumbnail}>
+        componentsProps={{
-            <img
+          image: {
-              src={item.thumbnail}
+            loading: "lazy",
-              loading="lazy"
+          },
-              onClick={() => setIndex(index)}
+        }}
-            />
+        onClick={({ index }) => setIndex(index)}
-          </ImageListItem>
+      />
-        ))}
-      </ImageList>
       <Lightbox
         slides={images}
         open={index >= 0}

picture-gallery-client/src/ImageGallery/models.ts

@@ -1,4 +1,4 @@
-import { Slide } from "yet-another-react-lightbox";
+import { Photo } from "react-photo-album";
 
 export interface Folders {
   name: string;
@@ -10,10 +10,9 @@ export interface Folders {
 export interface FolderPreview {
   name: string;
   fullPath: string;
-  numberOfFiles: number;
+  imagePreview: ImageWithThumbnail;
-  imagePreviewSrc: string | undefined;
 }
 
-export interface ImageWithThumbnail extends Slide {
+export interface ImageWithThumbnail extends Photo {
   thumbnail: string;
 }

picture-gallery-client/src/ImageGalleryLayout.tsx

@@ -109,14 +109,14 @@ function ImageGalleryLayout() {
           <>
             {foldersPreview.length > 0 && (
               <>
-                <Divider>
+                <Divider style={{ marginBottom: "10px" }}>
                   <Chip label="Folders" size="small" />
                 </Divider>
                 <FolderGallery folders={foldersPreview} />
               </>
             )}
             {images.length > 0 && foldersPreview.length > 0 && (
-              <Divider>
+              <Divider style={{ marginBottom: "10px" }}>
                 <Chip label="Images" size="small" />
               </Divider>
             )}

picture-gallery-client/src/util/responsive.ts

@@ -1,11 +0,0 @@
-import useMediaQuery from "@mui/material/useMediaQuery";
-
-const breakpoints = Object.freeze([1200, 600, 300, 0]);
-
-export function useColumns(): number {
-  const values = [5, 4, 3, 2];
-  const index = breakpoints
-    .map((b) => useMediaQuery(`(min-width:${b}px)`))
-    .findIndex((a) => a);
-  return Math.max(values[Math.max(index, 0)], 1);
-}

picture-gallery-server/src/controller/common.ts

@@ -2,6 +2,7 @@ import express from "express";
 import path from "path";
 import fs, { Dirent } from "fs";
 import { thumbnailPath, thumbnailPublicPath } from "../paths";
+import { createThumbnailAsyncForImage } from "../thumbnails";
 
 export const getRequestedPath = (req: express.Request): string =>
   req.params[1] === undefined || req.params[1] === "/" ? "" : req.params[1];
@@ -20,10 +21,20 @@ export const getSrc = (requestedPath: string, f: Dirent): string =>
   path.posix.join("/staticImages", requestedPath, f.name);
 
 export const getThumbnail = (
-  thumbnailExists: boolean,
+  filePath: string,
-  requestedPath: string,
   f: Dirent,
-): string =>
+  thumbnailExists: boolean,
-  thumbnailExists
+): string => {
-    ? path.posix.join("/staticImages", thumbnailPath, requestedPath, f.name)
+  if (thumbnailExists) {
-    : getSrc(requestedPath, f);
+    return path.posix.join("/staticImages", thumbnailPath, filePath, f.name);
+  }
+
+  createThumbnailAsyncForImage(path.posix.join(filePath, f.name));
+  return getSrc(filePath, f);
+};
+
+export const notEmpty = <TValue>(
+  value: TValue | void | null | undefined,
+): value is TValue => {
+  return value !== null && value !== undefined;
+};

picture-gallery-server/src/controller/directories.ts

@@ -1,11 +1,12 @@
 import fs from "fs";
 import * as path from "path";
 import express from "express";
-import { a, FolderPreview, Folders } from "../models";
+import { a, FolderPreview, Folders, Image } from "../models";
 import { publicPath, thumbnailPath, thumbnailPublicPath } from "../paths";
 import { securityValidation } from "./securityChecks";
-import { getRequestedPath, getThumbnail } from "./common";
+import { getRequestedPath, notEmpty } from "./common";
 import { consoleLogger } from "../logging";
+import { getImage } from "./images";
 
 export const walk = async (dirPath: string): Promise<Folders> => {
   const dirEnts = fs.readdirSync(path.posix.join(publicPath, dirPath), {
@@ -29,7 +30,9 @@ export const walk = async (dirPath: string): Promise<Folders> => {
   };
 };
 
-const getFirstImageInFolder = (dirPath: string): string | undefined => {
+const getFirstImageInFolder = async (
+  dirPath: string,
+): Promise<Image | void> => {
   const dirs = [dirPath];
   while (dirs.length > 0) {
     const curPath = dirs.shift();
@@ -38,30 +41,22 @@ const getFirstImageInFolder = (dirPath: string): string | undefined => {
     });
     for (let i = 0; i < dirContent.length; i += 1) {
       const content = dirContent[i];
-      const filePath = path.posix.join(curPath, content.name);
       if (content.isFile()) {
-        return getThumbnail(
+        const thumbnailExists = fs.existsSync(
-          fs.existsSync(path.posix.join(thumbnailPublicPath, filePath)),
+          path.posix.join(thumbnailPublicPath, curPath, content.name),
-          curPath,
-          content,
         );
+        return getImage(content, curPath, thumbnailExists);
       }
       if (content.isDirectory()) {
-        dirs.push(filePath);
+        const nextDirPath = path.posix.join(curPath, content.name);
+        dirs.push(nextDirPath);
       }
     }
   }
   return undefined;
 };
 
-const getNumberOfFiles = (dirPath: string): number =>
+export const getFolderPreview = async (
-  fs
-    .readdirSync(path.posix.join(publicPath, dirPath), {
-      withFileTypes: true,
-    })
-    .filter((d) => d.isFile()).length;
-
-export const getFolderPreview = (
   req: express.Request,
   res: express.Response,
 ) => {
@@ -77,17 +72,23 @@ export const getFolderPreview = (
       .filter((d) => d.isDirectory())
       .filter((d) => !d.name.includes(thumbnailPath.substring(1)));
 
-    res.json(
+    const folderPreviewsToLoad = dirents.map(async (dir) => {
-      dirents.map((dir) => {
+      const fullPath = path.posix.join(requestedPath, dir.name);
-        const fullPath = path.posix.join(requestedPath, dir.name);
+      const imageForPreview = await getFirstImageInFolder(fullPath);
+      if (notEmpty(imageForPreview)) {
         return a<FolderPreview>({
           name: dir.name,
           fullPath,
-          numberOfFiles: getNumberOfFiles(fullPath),
+          imagePreview: imageForPreview,
-          imagePreviewSrc: getFirstImageInFolder(fullPath),
         });
-      }),
+      }
+      return undefined;
+    });
+
+    const folderPreviews = (await Promise.all(folderPreviewsToLoad)).filter(
+      notEmpty,
     );
+    res.json(folderPreviews);
   } catch (e) {
     consoleLogger.warn(`Error when trying to access ${req.path}: ${e}`);
     res.status(400).json({ message: `Path ${req.path} not accessible.` });

picture-gallery-server/src/controller/images.ts

@@ -5,37 +5,49 @@ import path from "path";
 import natsort from "natsort";
 import { publicPath } from "../paths";
 import { a, Folder, Image } from "../models";
-import { createThumbnailAsyncForImage } from "../thumbnails";
 import { consoleLogger } from "../logging";
 import { securityValidation } from "./securityChecks";
 import {
   getRequestedPath,
   getSrc,
   getThumbnail,
+  notEmpty,
   readThumbnails,
 } from "./common";
 
-const notEmpty = <TValue>(
-  value: TValue | void | null | undefined,
-): value is TValue => {
-  return value !== null && value !== undefined;
-};
-
 const toImage = (
   metadata: sharp.Metadata,
-  thumbnailExists: boolean,
+  filePath: string,
-  requestedPath: string,
   f: Dirent,
+  thumbnailExists: boolean,
 ): Image => {
   const widthAndHeightSwap = metadata.orientation > 4; // see https://exiftool.org/TagNames/EXIF.html
   return a<Image>({
-    src: getSrc(requestedPath, f),
+    src: getSrc(filePath, f),
-    thumbnail: getThumbnail(thumbnailExists, requestedPath, f),
+    thumbnail: getThumbnail(filePath, f, thumbnailExists),
     width: widthAndHeightSwap ? metadata.height : metadata.width,
     height: widthAndHeightSwap ? metadata.width : metadata.height,
   });
 };
 
+export const getImage = async (
+  f: Dirent,
+  filePath: string,
+  thumbnailExists: boolean,
+): Promise<Image | void> =>
+  sharp(path.posix.join(publicPath, filePath, f.name))
+    .metadata()
+    .then((metadata) => toImage(metadata, filePath, f, thumbnailExists))
+    .catch((err) => {
+      consoleLogger.error(
+        `Reading metadata from ${path.posix.join(
+          publicPath,
+          filePath,
+          f.name,
+        )} produced the following error: ${err.message}`,
+      );
+    });
+
 const getImagesToBeLoaded = (
   dirents: Dirent[],
   thumbnails: string[],
@@ -46,25 +58,9 @@ const getImagesToBeLoaded = (
     // sorts by name in a natural way
     // could be made configurable for sorting in other ways (e.g. date of creation)
     .sort((file1, file2) => natsort()(file1.name, file2.name))
-    .map((f) => {
+    .map(async (f) => {
       const thumbnailExists: boolean = thumbnails.includes(f.name);
-      if (!thumbnailExists) {
+      return getImage(f, requestedPath, thumbnailExists);
-        createThumbnailAsyncForImage(path.posix.join(requestedPath, f.name));
-      }
-      return sharp(path.posix.join(publicPath, requestedPath, f.name))
-        .metadata()
-        .then((metadata) =>
-          toImage(metadata, thumbnailExists, requestedPath, f),
-        )
-        .catch((err) => {
-          consoleLogger.error(
-            `Reading metadata from ${path.posix.join(
-              publicPath,
-              requestedPath,
-              f.name,
-            )} produced the following error: ${err.message}`,
-          );
-        });
     });
 
 export const getImages = async (

picture-gallery-server/src/models.ts

@@ -19,8 +19,7 @@ export interface Folders {
 export interface FolderPreview {
   name: string;
   fullPath: string;
-  numberOfFiles: number;
+  imagePreview: Image;
-  imagePreviewSrc: string | undefined;
 }
 
 export const a = <T>(v: T): T => {

picture-gallery-server/src/thumbnails.ts

@@ -14,11 +14,11 @@ export const createThumbnailAsyncForImage = (image: string) => {
     .then((info) => {
       const width = Math.max(
         Math.min(info.width, minimumPixelForThumbnail),
-        Math.round((info.width * percentage) / 100)
+        Math.round((info.width * percentage) / 100),
       );
       const height = Math.max(
         Math.min(info.height, minimumPixelForThumbnail),
-        Math.round((info.height * percentage) / 100)
+        Math.round((info.height * percentage) / 100),
       );
 
       fs.mkdir(
@@ -29,12 +29,12 @@ export const createThumbnailAsyncForImage = (image: string) => {
             .withMetadata()
             .resize(info.width > info.height ? { width } : { height })
             .toFile(`${path.posix.join(thumbnailPublicPath, image)}`);
-        }
+        },
       );
     })
     .catch((err) => {
       consoleLogger.error(
-        `Thumbnail creation of ${publicImagePath} produced the following error: ${err.message}`
+        `Thumbnail creation of ${publicImagePath} produced the following error: ${err.message}`,
       );
     });
 };
@@ -50,7 +50,7 @@ export const initThumbnailsAsync = (dirPath: string) => {
     recursive: true,
   });
   const thumbnails = fs.readdirSync(
-    path.posix.join(thumbnailPublicPath, dirPath)
+    path.posix.join(thumbnailPublicPath, dirPath),
   );
 
   dirEnts