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CommentServiceImpl.java
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CommentServiceImpl.java
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package run.halo.app.content.comment;
import static run.halo.app.extension.index.query.QueryFactory.and;
import static run.halo.app.extension.index.query.QueryFactory.equal;
import static run.halo.app.extension.index.query.QueryFactory.isNull;
import java.time.Instant;
import java.util.Set;
import java.util.function.Function;
import java.util.stream.Collectors;
import org.apache.commons.lang3.BooleanUtils;
import org.springframework.data.domain.Sort;
import org.springframework.lang.NonNull;
import org.springframework.security.core.context.ReactiveSecurityContextHolder;
import org.springframework.stereotype.Component;
import org.springframework.util.Assert;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import run.halo.app.core.extension.User;
import run.halo.app.core.extension.content.Comment;
import run.halo.app.core.extension.service.RoleService;
import run.halo.app.core.extension.service.UserService;
import run.halo.app.extension.Extension;
import run.halo.app.extension.ListOptions;
import run.halo.app.extension.ListResult;
import run.halo.app.extension.PageRequest;
import run.halo.app.extension.PageRequestImpl;
import run.halo.app.extension.ReactiveExtensionClient;
import run.halo.app.extension.Ref;
import run.halo.app.extension.router.selector.FieldSelector;
import run.halo.app.infra.SystemConfigurableEnvironmentFetcher;
import run.halo.app.infra.exception.AccessDeniedException;
import run.halo.app.metrics.CounterService;
import run.halo.app.metrics.MeterUtils;
import run.halo.app.plugin.ExtensionComponentsFinder;
/**
* Comment service implementation.
*
* @author guqing
* @since 2.0.0
*/
@Component
public class CommentServiceImpl implements CommentService {
private final ReactiveExtensionClient client;
private final UserService userService;
private final RoleService roleService;
private final ExtensionComponentsFinder extensionComponentsFinder;
private final SystemConfigurableEnvironmentFetcher environmentFetcher;
private final CounterService counterService;
public CommentServiceImpl(ReactiveExtensionClient client,
UserService userService, ExtensionComponentsFinder extensionComponentsFinder,
SystemConfigurableEnvironmentFetcher environmentFetcher,
CounterService counterService, RoleService roleService
) {
this.client = client;
this.userService = userService;
this.extensionComponentsFinder = extensionComponentsFinder;
this.environmentFetcher = environmentFetcher;
this.counterService = counterService;
this.roleService = roleService;
}
@Override
public Mono<ListResult<ListedComment>> listComment(CommentQuery commentQuery) {
return this.client.listBy(Comment.class, commentQuery.toListOptions(),
commentQuery.toPageRequest())
.flatMap(comments -> Flux.fromStream(comments.get()
.map(this::toListedComment))
.concatMap(Function.identity())
.collectList()
.map(list -> new ListResult<>(comments.getPage(), comments.getSize(),
comments.getTotal(), list)
)
);
}
@Override
public Mono<Comment> create(Comment comment) {
return environmentFetcher.fetchComment()
.flatMap(commentSetting -> {
if (Boolean.FALSE.equals(commentSetting.getEnable())) {
return Mono.error(
new AccessDeniedException("The comment function has been turned off.",
"problemDetail.comment.turnedOff", null));
}
if (checkCommentOwner(comment, commentSetting.getSystemUserOnly())) {
return Mono.error(
new AccessDeniedException("Allow only system users to comment.",
"problemDetail.comment.systemUsersOnly", null));
}
if (comment.getSpec().getTop() == null) {
comment.getSpec().setTop(false);
}
if (comment.getSpec().getPriority() == null) {
comment.getSpec().setPriority(0);
}
comment.getSpec()
.setApproved(Boolean.FALSE.equals(commentSetting.getRequireReviewForNew()));
if (BooleanUtils.isTrue(comment.getSpec().getApproved())
&& comment.getSpec().getApprovedTime() == null) {
comment.getSpec().setApprovedTime(Instant.now());
}
if (comment.getSpec().getCreationTime() == null) {
comment.getSpec().setCreationTime(Instant.now());
}
comment.getSpec().setHidden(false);
// return if the comment owner is not null
if (comment.getSpec().getOwner() != null) {
return Mono.just(comment);
}
// populate owner from current user
return fetchCurrentUser()
.flatMap(currentUser -> ReactiveSecurityContextHolder.getContext()
.doOnNext(securityContext -> {
if (commentSetting.getAutoApproveAdminComment()) {
var authentication = securityContext.getAuthentication();
var roles = authentication.getAuthorities().stream()
// remove prefix: ROLE_
.map(o -> o.getAuthority().substring(5))
.collect(Collectors.toSet());
roleService.contains(roles, Set.of("role-template-manage-comments"))
.doOnNext(result -> {
if (result) {
comment.getSpec().setApproved(true);
comment.getSpec().setApprovedTime(Instant.now());
}
})
.subscribe();
}
})
.flatMap(securityContext -> Mono.just(toCommentOwner(currentUser)))
.map(owner -> {
comment.getSpec().setOwner(owner);
return comment;
})
.switchIfEmpty(
Mono.error(new IllegalStateException("The owner must not be null."))
));
})
.flatMap(client::create);
}
@Override
public Mono<Void> removeBySubject(@NonNull Ref subjectRef) {
Assert.notNull(subjectRef, "The subjectRef must not be null.");
// ascending order by creation time and name
var pageRequest = PageRequestImpl.of(1, 200,
Sort.by("metadata.creationTimestamp", "metadata.name"));
return Flux.defer(() -> listCommentsByRef(subjectRef, pageRequest))
.expand(page -> page.hasNext()
? listCommentsByRef(subjectRef, pageRequest)
: Mono.empty()
)
.flatMap(page -> Flux.fromIterable(page.getItems()))
.flatMap(client::delete)
.then();
}
Mono<ListResult<Comment>> listCommentsByRef(Ref subjectRef, PageRequest pageRequest) {
var listOptions = new ListOptions();
listOptions.setFieldSelector(FieldSelector.of(
and(equal("spec.subjectRef", Comment.toSubjectRefKey(subjectRef)),
isNull("metadata.deletionTimestamp"))
));
return client.listBy(Comment.class, listOptions, pageRequest);
}
private boolean checkCommentOwner(Comment comment, Boolean onlySystemUser) {
Comment.CommentOwner owner = comment.getSpec().getOwner();
if (Boolean.TRUE.equals(onlySystemUser)) {
return owner != null && Comment.CommentOwner.KIND_EMAIL.equals(owner.getKind());
}
return false;
}
private Comment.CommentOwner toCommentOwner(User user) {
Comment.CommentOwner owner = new Comment.CommentOwner();
owner.setKind(User.KIND);
owner.setName(user.getMetadata().getName());
owner.setDisplayName(user.getSpec().getDisplayName());
return owner;
}
private Mono<User> fetchCurrentUser() {
return ReactiveSecurityContextHolder.getContext()
.map(securityContext -> securityContext.getAuthentication().getName())
.flatMap(username -> client.fetch(User.class, username));
}
private Mono<ListedComment> toListedComment(Comment comment) {
var builder = ListedComment.builder().comment(comment);
// not empty
var ownerInfoMono = getCommentOwnerInfo(comment.getSpec().getOwner())
.doOnNext(builder::owner);
var subjectMono = getCommentSubject(comment.getSpec().getSubjectRef())
.doOnNext(builder::subject);
var statsMono = fetchStats(comment.getMetadata().getName())
.doOnNext(builder::stats);
return Mono.when(ownerInfoMono, subjectMono, statsMono)
.then(Mono.fromSupplier(builder::build));
}
Mono<CommentStats> fetchStats(String commentName) {
Assert.notNull(commentName, "The commentName must not be null.");
return counterService.getByName(MeterUtils.nameOf(Comment.class, commentName))
.map(counter -> CommentStats.builder()
.upvote(counter.getUpvote())
.build()
)
.defaultIfEmpty(CommentStats.empty());
}
private Mono<OwnerInfo> getCommentOwnerInfo(Comment.CommentOwner owner) {
if (User.KIND.equals(owner.getKind())) {
return userService.getUserOrGhost(owner.getName())
.map(OwnerInfo::from);
}
if (Comment.CommentOwner.KIND_EMAIL.equals(owner.getKind())) {
return Mono.just(OwnerInfo.from(owner));
}
throw new IllegalStateException(
"Unsupported owner kind: " + owner.getKind());
}
@SuppressWarnings("unchecked")
Mono<Extension> getCommentSubject(Ref ref) {
return extensionComponentsFinder.getExtensions(CommentSubject.class)
.stream()
.filter(commentSubject -> commentSubject.supports(ref))
.findFirst()
.map(commentSubject -> commentSubject.get(ref.getName()))
.orElseGet(Mono::empty);
}
}