text: // Copyright 2013 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #include "extensions/common/manifest_handlers/kiosk_mode_info.h"
  
  #include <memory>
  
  #include "base/strings/string16.h"
  #include "base/strings/string_util.h"
  #include "base/strings/utf_string_conversions.h"
  #include "base/values.h"
  #include "base/version.h"
  #include "extensions/common/api/extensions_manifest_types.h"
  #include "extensions/common/manifest_constants.h"
  
  namespace extensions {
  
  namespace keys = manifest_keys;
  
  using api::extensions_manifest_types::KioskSecondaryAppsType;
  
  KioskModeInfo::KioskModeInfo(KioskStatus kiosk_status,
                               const std::vector<std::string>& secondary_app_ids,
                               const std::string& required_platform_version)
      : kiosk_status(kiosk_status),
        secondary_app_ids(secondary_app_ids),
        required_platform_version(required_platform_version) {}
  
  KioskModeInfo::~KioskModeInfo() {
  }
  
  // static
  KioskModeInfo* KioskModeInfo::Get(const Extension* extension) {
    return static_cast<KioskModeInfo*>(
        extension->GetManifestData(keys::kKioskMode));
  }
  
  // static
  bool KioskModeInfo::IsKioskEnabled(const Extension* extension) {
    KioskModeInfo* info = Get(extension);
    return info ? info->kiosk_status != NONE : false;
  }
  
  // static
  bool KioskModeInfo::IsKioskOnly(const Extension* extension) {
    KioskModeInfo* info = Get(extension);
    return info ? info->kiosk_status == ONLY : false;
  }
  
  // static
  bool KioskModeInfo::HasSecondaryApps(const Extension* extension) {
    KioskModeInfo* info = Get(extension);
    return info && !info->secondary_app_ids.empty();
  }
  
  // static
  bool KioskModeInfo::IsValidPlatformVersion(const std::string& version_string) {
    const base::Version version(version_string);
    return version.IsValid() && version.components().size() <= 3u;
  }
  
  KioskModeHandler::KioskModeHandler() {
    supported_keys_.push_back(keys::kKiosk);
    supported_keys_.push_back(keys::kKioskEnabled);
    supported_keys_.push_back(keys::kKioskOnly);
    supported_keys_.push_back(keys::kKioskSecondaryApps);
  }
  
  KioskModeHandler::~KioskModeHandler() {
  }
  
  bool KioskModeHandler::Parse(Extension* extension, base::string16* error) {
    const Manifest* manifest = extension->manifest();
    DCHECK(manifest->HasKey(keys::kKioskEnabled) ||
           manifest->HasKey(keys::kKioskOnly));
  
    bool kiosk_enabled = false;
    if (manifest->HasKey(keys::kKioskEnabled) &&
        !manifest->GetBoolean(keys::kKioskEnabled, &kiosk_enabled)) {
      *error = base::ASCIIToUTF16(manifest_errors::kInvalidKioskEnabled);
      return false;
    }
  
    bool kiosk_only = false;
    if (manifest->HasKey(keys::kKioskOnly) &&
        !manifest->GetBoolean(keys::kKioskOnly, &kiosk_only)) {
      *error = base::ASCIIToUTF16(manifest_errors::kInvalidKioskOnly);
      return false;
    }
  
    if (kiosk_only && !kiosk_enabled) {
      *error = base::ASCIIToUTF16(
          manifest_errors::kInvalidKioskOnlyButNotEnabled);
      return false;
    }
  
    // All other use cases should be already filtered out by manifest feature
    // checks.
    DCHECK(extension->is_platform_app());
  
    KioskModeInfo::KioskStatus kiosk_status = KioskModeInfo::NONE;
    if (kiosk_enabled)
      kiosk_status = kiosk_only ? KioskModeInfo::ONLY : KioskModeInfo::ENABLED;
  
    // Kiosk secondary apps key is optional.
    std::vector<std::string> ids;
    if (manifest->HasKey(keys::kKioskSecondaryApps)) {
      const base::Value* secondary_apps = nullptr;
      const base::ListValue* list = nullptr;
      if (!manifest->Get(keys::kKioskSecondaryApps, &secondary_apps) ||
          !secondary_apps->GetAsList(&list)) {
        *error = base::ASCIIToUTF16(manifest_errors::kInvalidKioskSecondaryApps);
        return false;
      }
  
      for (const base::Value* value : *list) {
        std::unique_ptr<KioskSecondaryAppsType> app =
            KioskSecondaryAppsType::FromValue(*value, error);
        if (!app) {
          *error = base::ASCIIToUTF16(
              manifest_errors::kInvalidKioskSecondaryAppsBadAppId);
          return false;
        }
        ids.push_back(app->id);
      }
    }
  
    // Optional kiosk.required_platform_version key.
    std::string required_platform_version;
    if (manifest->HasPath(keys::kKioskRequiredPlatformVersion) &&
        (!manifest->GetString(keys::kKioskRequiredPlatformVersion,
                              &required_platform_version) ||
         !KioskModeInfo::IsValidPlatformVersion(required_platform_version))) {
      *error = base::ASCIIToUTF16(
          manifest_errors::kInvalidKioskRequiredPlatformVersion);
      return false;
    }
  
    extension->SetManifestData(
        keys::kKioskMode,
        new KioskModeInfo(kiosk_status, ids, required_platform_version));
  
    return true;
  }
  
  const std::vector<std::string> KioskModeHandler::Keys() const {
    return supported_keys_;
  }
  
  }  // namespace extensions
  