service-worker.min.js.map

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['GET'];\n\n/**\n * isBlackListed\n * @param {string} url\n * @returns {boolean}\n */\nfunction isBlacklisted(url) {\n  return CACHE_BLACKLIST.length > 0\n    ? !CACHE_BLACKLIST.filter((rule) => {\n        if (typeof rule === 'function') {\n          return !rule(url);\n        } else {\n          return false;\n        }\n      }).length\n    : false;\n}\n\n/**\n * getFileExtension\n * @param {string} url\n * @returns {string}\n */\nfunction getFileExtension(url) {\n  const extension = url.split('.').reverse()[0].split('?')[0];\n  return extension.endsWith('/') ? '/' : extension;\n}\n\n/**\n * getTTL\n * @param {string} url\n */\nfunction getTTL(url) {\n  if (typeof url === 'string') {\n    const extension = getFileExtension(url);\n    if (typeof MAX_TTL[extension] === 'number') {\n      return MAX_TTL[extension];\n    } else {\n      return null;\n    }\n  } else {\n    return null;\n  }\n}\n\n/**\n * installServiceWorker\n * @returns {Promise}\n */\nfunction installServiceWorker() {\n  return Promise.all([\n    caches.open(CACHE_VERSIONS.assets).then((cache) => {\n      return cache.addAll(BASE_CACHE_FILES);\n    }),\n    caches.open(CACHE_VERSIONS.offline).then((cache) => {\n      return cache.addAll(OFFLINE_CACHE_FILES);\n    }),\n    caches.open(CACHE_VERSIONS.notFound).then((cache) => {\n      return cache.addAll(NOT_FOUND_CACHE_FILES);\n    })\n  ]).then(() => {\n    return self.skipWaiting();\n  });\n}\n\n/**\n * cleanupLegacyCache\n * @returns {Promise}\n */\nfunction cleanupLegacyCache() {\n  const currentCaches = Object.keys(CACHE_VERSIONS).map((key) => {\n    return CACHE_VERSIONS[key];\n  });\n\n  return new Promise((resolve, reject) => {\n    caches\n      .keys()\n      .then((keys) => {\n        return keys.filter((key) => {\n          return !~currentCaches.indexOf(key);\n        });\n      })\n      .then((legacy) => {\n        if (legacy.length) {\n          Promise.all(\n            legacy.map((legacyKey) => {\n              return caches.delete(legacyKey);\n            })\n          )\n            .then(() => {\n              resolve();\n            })\n            .catch((err) => {\n              reject(err);\n            });\n        } else {\n          resolve();\n        }\n      })\n      .catch((err) => {\n        reject(err);\n      });\n  });\n}\n\nself.addEventListener('install', (event) => {\n  event.waitUntil(Promise.all([installServiceWorker(), self.skipWaiting()]));\n});\n\n// The activate handler takes care of cleaning up old caches.\nself.addEventListener('activate', (event) => {\n  event.waitUntil(\n    Promise.all([\n      cleanupLegacyCache(),\n      self.clients.claim(),\n      self.skipWaiting()\n    ]).catch((err) => {\n      console.log(err);\n      self.skipWaiting();\n    })\n  );\n});\n\nself.addEventListener('fetch', (event) => {\n  event.respondWith(\n    caches.open(CACHE_VERSIONS.content).then((cache) => {\n      return cache\n        .match(event.request)\n        .then((response) => {\n          if (response) {\n            const headers = response.headers.entries();\n            let date = null;\n\n            for (const pair of headers) {\n              if (pair[0] === 'date') {\n                date = new Date(pair[1]);\n              }\n            }\n            if (date) {\n              const age = parseInt(\n                (new Date().getTime() - date.getTime()) / 1000\n              );\n              const ttl = getTTL(event.request.url);\n\n              if (ttl && age > ttl) {\n                return new Promise((resolve) => {\n                  return fetch(event.request.clone())\n                    .then((updatedResponse) => {\n                      if (updatedResponse) {\n                        cache.put(event.request, updatedResponse.clone());\n                        resolve(updatedResponse);\n                      } else {\n                        resolve(response);\n                      }\n                    })\n                    .catch(() => {\n                      resolve(response);\n                    });\n                }).catch((err) => {\n                  console.log(err);\n                  return response;\n                });\n              } else {\n                return response;\n              }\n            } else {\n              return response;\n            }\n          } else {\n            return null;\n          }\n        })\n        .then((response) => {\n          if (response) {\n            return response;\n          } else {\n            return fetch(event.request.clone())\n              .then((response) => {\n                if (response.status < 400) {\n                  if (\n                    ~SUPPORTED_METHODS.indexOf(event.request.method) &&\n                    !isBlacklisted(event.request.url) &&\n                    event.request.url.slice(0, 4) === 'http'\n                  ) {\n                    cache.put(event.request, response.clone());\n                  }\n                  return response;\n                } else {\n                  return caches.open(CACHE_VERSIONS.notFound).then((cache) => {\n                    return cache.match(NOT_FOUND_PAGE);\n                  });\n                }\n              })\n              .then((response) => {\n                if (response) {\n                  return response;\n                }\n              })\n              .catch(() => {\n                return caches\n                  .open(CACHE_VERSIONS.offline)\n                  .then((offlineCache) => {\n                    return offlineCache.match(OFFLINE_PAGE);\n                  });\n              });\n          }\n        })\n        .catch((error) => {\n          console.error('  Error in fetch handler:', error);\n          throw error;\n        });\n    })\n  );\n});\n"]}