PublishEvent actor

ng-broker/src/rocksdb_server_storage.rs

@@ -13,7 +13,7 @@ use std::collections::HashMap;
 use std::fs::{read, File, OpenOptions};
 use std::io::Write;
 use std::path::{Path, PathBuf};
-use std::sync::Mutex;
+use std::sync::{Arc, Mutex};
 
 use crate::server_broker::*;
 use crate::server_storage::admin::account::Account;
@@ -22,9 +22,12 @@ use crate::server_storage::admin::wallet::Wallet;
 use crate::server_storage::core::*;
 use crate::types::*;
 use ng_net::types::*;
+use ng_repo::block_storage::{BlockStorage, HashMapBlockStorage};
 use ng_repo::errors::{ProtocolError, ServerError, StorageError};
 
 use ng_repo::log::*;
+use ng_repo::object::Object;
+use ng_repo::store::Store;
 use ng_repo::types::*;
 use ng_storage_rocksdb::block_storage::RocksDbBlockStorage;
 use ng_storage_rocksdb::kcv_storage::RocksDbKCVStorage;
@@ -400,42 +403,46 @@ impl RocksDbServerStorage {
         }
     }
 
-    pub(crate) fn topic_sub(
+    fn check_overlay(&self, overlay: &OverlayId) -> Result<OverlayId, ServerError> {
-        &self,
-        overlay: &OverlayId,
-        repo: &RepoHash,
-        topic: &TopicId,
-        user_id: &UserId,
-        publisher: Option<&PublisherAdvert>,
-    ) -> Result<TopicSubRes, ServerError> {
         let mut overlay_storage =
             OverlayStorage::open(overlay, &self.core_storage).map_err(|e| match e {
                 StorageError::NotFound => ServerError::OverlayNotFound,
                 _ => e.into(),
             })?;
-        let overlay = match overlay_storage.overlay_type() {
+        Ok(match overlay_storage.overlay_type() {
             OverlayType::Outer(_) => {
                 if overlay.is_outer() {
-                    overlay
+                    *overlay
                 } else {
                     return Err(ServerError::OverlayMismatch);
                 }
             }
             OverlayType::Inner(outer) => {
                 if outer.is_outer() {
-                    outer
+                    *outer
                 } else {
                     return Err(ServerError::OverlayMismatch);
                 }
             }
             OverlayType::InnerOnly => {
                 if overlay.is_inner() {
-                    overlay
+                    *overlay
                 } else {
                     return Err(ServerError::OverlayMismatch);
                 }
             }
-        };
+        })
+    }
+
+    pub(crate) fn topic_sub(
+        &self,
+        overlay: &OverlayId,
+        repo: &RepoHash,
+        topic: &TopicId,
+        user_id: &UserId,
+        publisher: Option<&PublisherAdvert>,
+    ) -> Result<TopicSubRes, ServerError> {
+        let overlay = self.check_overlay(overlay)?;
         // now we check that the repo was previously pinned.
         // if it was opened but not pinned, then this should be deal with in the ServerBroker, in memory, not here)
 
@@ -443,14 +450,14 @@ impl RocksDbServerStorage {
         // (we already checked that the advert is valid)
 
         let mut topic_storage =
-            TopicStorage::create(topic, overlay, repo, &self.core_storage, true)?;
+            TopicStorage::create(topic, &overlay, repo, &self.core_storage, true)?;
         let _ = TopicStorage::USERS.get_or_add(&mut topic_storage, user_id, &is_publisher)?;
 
         if is_publisher {
             let _ = TopicStorage::ADVERT.get_or_set(&mut topic_storage, publisher.unwrap())?;
         }
 
-        let mut repo_info = RepoHashStorage::open(repo, overlay, &self.core_storage)?;
+        let mut repo_info = RepoHashStorage::open(repo, &overlay, &self.core_storage)?;
         RepoHashStorage::TOPICS.add_lazy(&mut repo_info, topic)?;
 
         Ok(TopicSubRes::new_from_heads(
@@ -468,4 +475,91 @@ impl RocksDbServerStorage {
         //TODO: implement correctly !
         Ok(vec![Block::dummy()])
     }
+
+    fn add_block(
+        &self,
+        overlay_id: &OverlayId,
+        overlay_storage: &mut OverlayStorage,
+        block: Block,
+    ) -> Result<BlockId, StorageError> {
+        let block_id = self.block_storage.put(overlay_id, &block, true)?;
+        OverlayStorage::BLOCKS.increment(overlay_storage, &block_id)?;
+        Ok(block_id)
+    }
+
+    pub(crate) fn save_event(
+        &self,
+        overlay: &OverlayId,
+        mut event: Event,
+        user_id: &UserId,
+    ) -> Result<(), ServerError> {
+        if overlay.is_outer() {
+            // we don't publish events on the outer overlay!
+            return Err(ServerError::OverlayMismatch);
+        }
+        let overlay = self.check_overlay(overlay)?;
+        let overlay = &overlay;
+
+        // check that the sequence number is correct
+
+        // check that the topic exists and that this user has pinned it as publisher
+        let mut topic_storage = TopicStorage::open(event.topic_id(), overlay, &self.core_storage)
+            .map_err(|e| match e {
+            StorageError::NotFound => ServerError::TopicNotFound,
+            _ => e.into(),
+        })?;
+        let is_publisher = TopicStorage::USERS
+            .get(&mut topic_storage, user_id)
+            .map_err(|e| match e {
+                StorageError::NotFound => ServerError::AccessDenied,
+                _ => e.into(),
+            })?;
+        if !is_publisher {
+            return Err(ServerError::AccessDenied);
+        }
+
+        // remove the blocks from inside the event, and save the empty event and each block separately.
+        match event {
+            Event::V0(mut v0) => {
+                let mut overlay_storage = OverlayStorage::new(overlay, &self.core_storage);
+                let mut extracted_blocks_ids = Vec::with_capacity(v0.content.blocks.len());
+                let first_block_copy = v0.content.blocks[0].clone();
+                let temp_mini_block_storage = HashMapBlockStorage::new();
+                for block in v0.content.blocks {
+                    let _ = temp_mini_block_storage.put(overlay, &block, false)?;
+                    extracted_blocks_ids.push(self.add_block(
+                        overlay,
+                        &mut overlay_storage,
+                        block,
+                    )?);
+                }
+
+                // creating a temporary store to access the blocks
+                let temp_store = Store::new_from_overlay_id(
+                    overlay,
+                    Arc::new(std::sync::RwLock::new(temp_mini_block_storage)),
+                );
+                let commit_id = extracted_blocks_ids[0];
+                let header = Object::load_header(&first_block_copy, &temp_store)
+                    .map_err(|_| ServerError::InvalidHeader)?;
+
+                v0.content.blocks = vec![];
+                let event_info = EventInfo {
+                    event: Event::V0(v0),
+                    blocks: extracted_blocks_ids,
+                };
+
+                CommitStorage::create(
+                    &commit_id,
+                    overlay,
+                    event_info,
+                    &header,
+                    true,
+                    &self.core_storage,
+                )?;
+            }
+        }
+
+        Ok(())
+    }
 }

ng-broker/src/server_broker.rs

@@ -213,4 +213,13 @@ impl IServerBroker for ServerBroker {
     fn get_commit(&self, overlay: &OverlayId, id: &ObjectId) -> Result<Vec<Block>, ServerError> {
         self.storage.get_commit(overlay, id)
     }
+
+    fn dispatch_event(
+        &self,
+        overlay: &OverlayId,
+        event: Event,
+        user_id: &UserId,
+    ) -> Result<(), ServerError> {
+        self.storage.save_event(overlay, event, user_id)
+    }
 }

ng-broker/src/server_storage/core/commit.rs

@@ -114,15 +114,33 @@ impl<'a> CommitStorage<'a> {
     pub fn create(
         id: &ObjectId,
         overlay: &OverlayId,
-        event: &Option<EventInfo>,
+        event: EventInfo,
+        header: &CommitHeader,
+        home_pinned: bool,
         storage: &'a dyn KCVStorage,
     ) -> Result<CommitStorage<'a>, StorageError> {
         let mut creating = CommitStorage::new(id, overlay, storage);
         if creating.exists() {
             return Err(StorageError::AlreadyExists);
         }
-        creating.event.set(event)?;
+        let event_opt = Some(event);
-        ExistentialValue::save(&creating, event)?;
+        creating.event.set(&event_opt)?;
+        ExistentialValue::save(&creating, &event_opt)?;
+
+        if home_pinned {
+            Self::HOME_PINNED.set(&mut creating, &true)?;
+        }
+
+        // adding all the references
+        for ack in header.acks() {
+            Self::ACKS.add(&mut creating, &ack)?;
+        }
+        for dep in header.deps() {
+            Self::DEPS.add(&mut creating, &dep)?;
+        }
+        for file in header.files() {
+            Self::FILES.add(&mut creating, file)?;
+        }
 
         Ok(creating)
     }

ng-broker/src/server_storage/core/overlay.rs

@@ -51,6 +51,7 @@ impl<'a> OverlayStorage<'a> {
 
     // Overlay properties
     pub const TYPE: ExistentialValueColumn = ExistentialValueColumn::new(b'y');
+    /// BE CAREFUL: this property is exceptionally stored on the InnerOverlay
     pub const TOPIC: SingleValueColumn<Self, TopicId> = SingleValueColumn::new(b't');
 
     // Overlay <-> Block refcount

ng-net/src/actors/client/event.rs

@@ -33,9 +33,15 @@ impl PublishEvent {
         self.1 = Some(overlay);
     }
 
-    // pub fn overlay(&self) -> &OverlayId {
+    pub fn overlay(&self) -> &OverlayId {
-    //     self.1.as_ref().unwrap()
+        self.1.as_ref().unwrap()
-    // }
+    }
+    pub fn event(&self) -> &Event {
+        &self.0
+    }
+    pub fn take_event(self) -> Event {
+        self.0
+    }
 }
 
 impl TryFrom<ProtocolMessage> for PublishEvent {
@@ -69,9 +75,16 @@ impl EActor for Actor<'_, PublishEvent, ()> {
     ) -> Result<(), ProtocolError> {
         let req = PublishEvent::try_from(msg)?;
 
-        //TODO implement all the server side logic
+        // send a ProtocolError if invalid signatures (will disconnect the client)
+        req.event().verify()?;
 
-        let res: Result<(), ServerError> = Ok(());
+        let broker = BROKER.read().await;
+        let overlay = req.overlay().clone();
+        let res = broker.get_server_broker()?.dispatch_event(
+            &overlay,
+            req.take_event(),
+            &fsm.lock().await.user_id_or_err()?,
+        );
 
         fsm.lock()
             .await

ng-net/src/server_broker.rs

@@ -73,4 +73,11 @@ pub trait IServerBroker: Send + Sync {
     ) -> Result<TopicSubRes, ServerError>;
 
     fn get_commit(&self, overlay: &OverlayId, id: &ObjectId) -> Result<Vec<Block>, ServerError>;
+
+    fn dispatch_event(
+        &self,
+        overlay: &OverlayId,
+        event: Event,
+        user_id: &UserId,
+    ) -> Result<(), ServerError>;
 }

ng-repo/src/block_storage.rs

@@ -31,7 +31,7 @@ pub trait BlockStorage: Send + Sync {
     // }
 
     /// Save a block to the storage.
-    fn put(&self, overlay: &OverlayId, block: &Block) -> Result<BlockId, StorageError>;
+    fn put(&self, overlay: &OverlayId, block: &Block, lazy: bool) -> Result<BlockId, StorageError>;
 
     /// Delete a block from the storage.
     fn del(&self, overlay: &OverlayId, id: &BlockId) -> Result<usize, StorageError>;
@@ -99,7 +99,7 @@ impl HashMapBlockStorage {
     pub async fn from_block_stream(overlay: &OverlayId, mut blockstream: Receiver<Block>) -> Self {
         let this = Self::new();
         while let Some(block) = blockstream.next().await {
-            this.put(overlay, &block).unwrap();
+            this.put(overlay, &block, false).unwrap();
         }
         this
     }
@@ -116,10 +116,14 @@ impl HashMapBlockStorage {
             .map(|x| x.clone())
             .collect()
     }
+    pub fn put_local(&self, block: &Block) -> Result<BlockId, StorageError> {
+        let overlay = OverlayId::nil();
+        self.put(&overlay, block, false)
+    }
 }
 
 impl BlockStorage for HashMapBlockStorage {
-    fn get(&self, overlay: &OverlayId, id: &BlockId) -> Result<Block, StorageError> {
+    fn get(&self, _overlay: &OverlayId, id: &BlockId) -> Result<Block, StorageError> {
         match self.blocks.read().unwrap().get(id) {
             Some(block) => {
                 let mut b = block.clone();
@@ -138,7 +142,12 @@ impl BlockStorage for HashMapBlockStorage {
         Ok(self.get_len())
     }
 
-    fn put(&self, overlay: &OverlayId, block: &Block) -> Result<BlockId, StorageError> {
+    fn put(
+        &self,
+        _overlay: &OverlayId,
+        block: &Block,
+        _lazy: bool,
+    ) -> Result<BlockId, StorageError> {
         let id = block.id();
         //log_debug!("PUTTING {}", id);
         let mut b = block.clone();

ng-repo/src/commit.rs

@@ -428,7 +428,7 @@ impl Commit {
         self.content().branch()
     }
 
-    /// Get commit signature
+    /// Get commit header
     pub fn header(&self) -> &Option<CommitHeader> {
         match self {
             Commit::V0(c) => &c.header,

ng-repo/src/errors.rs

@@ -68,6 +68,7 @@ pub enum NgError {
     SiteNotFoundOnBroker,
     BrokerConfigErrorStr(&'static str),
     BrokerConfigError(String),
+    MalformedEvent,
 }
 
 impl Error for NgError {}
@@ -222,6 +223,8 @@ pub enum ServerError {
     OverlayMismatch,
     OverlayNotFound,
     TopicNotFound,
+    AccessDenied,
+    InvalidHeader,
 }
 
 impl From<StorageError> for ServerError {

ng-repo/src/event.rs

@@ -91,6 +91,18 @@ impl Event {
         }
     }
 
+    pub fn publisher(&self) -> &PeerId {
+        match self {
+            Event::V0(v0) => &v0.content.publisher,
+        }
+    }
+
+    pub fn verify(&self) -> Result<(), NgError> {
+        match self {
+            Event::V0(v0) => v0.verify(),
+        }
+    }
+
     /// opens an event with the key derived from information kept in Repo.
     ///
     /// returns the Commit object and optional list of additional block IDs.
@@ -125,6 +137,23 @@ impl Event {
 }
 
 impl EventV0 {
+    pub fn verify(&self) -> Result<(), NgError> {
+        let content_ser = serde_bare::to_vec(&self.content)?;
+        verify(&content_ser, self.topic_sig, self.content.topic)?;
+        match self.content.publisher {
+            PeerId::Forwarded(peer_id) => verify(&content_ser, self.peer_sig, peer_id)?,
+            PeerId::ForwardedObfuscated(_) => {
+                panic!("cannot verify an Event with obfuscated publisher")
+            }
+            PeerId::Direct(_) => panic!("direct events are not supported"),
+        }
+        if self.content.blocks.len() < 2 {
+            // an event is always containing a commit, which always has at least 2 blocks (one for the commit content, and one for the commit body)
+            return Err(NgError::MalformedEvent);
+        }
+        Ok(())
+    }
+
     pub fn derive_key(
         repo_id: &RepoId,
         branch_id: &BranchId,
@@ -231,7 +260,8 @@ impl EventV0 {
         branch_id: &BranchId,
         branch_secret: &ReadCapSecret,
     ) -> Result<Commit, NgError> {
-        // TODO: verifier event signature
+        // verifying event signatures
+        self.verify()?;
 
         let publisher_pubkey = self.content.publisher.get_pub_key();
         let key = Self::derive_key(repo_id, branch_id, branch_secret, &publisher_pubkey);

ng-repo/src/object.rs

@@ -427,6 +427,53 @@ impl Object {
         Self::load(reference.id.clone(), Some(reference.key.clone()), store)
     }
 
+    pub fn load_header(
+        root_block: &Block,
+        store: &Store,
+    ) -> Result<CommitHeader, ObjectParseError> {
+        Self::load_header_(root_block, store)?
+            .0
+            .ok_or(ObjectParseError::InvalidHeader)
+    }
+
+    fn load_header_(
+        root: &Block,
+        store: &Store,
+    ) -> Result<(Option<CommitHeader>, Vec<Block>), ObjectParseError> {
+        match root.header_ref() {
+            Some(header_ref) => match header_ref.obj {
+                CommitHeaderObject::None | CommitHeaderObject::RandomAccess => {
+                    panic!("shouldn't happen")
+                }
+                CommitHeaderObject::Id(id) => {
+                    let obj_res = Object::load(id, Some(header_ref.key.clone()), store);
+                    match obj_res {
+                        Err(e) => return Err(e),
+                        Ok(obj) => match obj.content()? {
+                            ObjectContent::V0(ObjectContentV0::CommitHeader(mut commit_header)) => {
+                                commit_header.set_id(id);
+                                Ok((Some(commit_header), obj.blocks().cloned().collect()))
+                            }
+                            _ => return Err(ObjectParseError::InvalidHeader),
+                        },
+                    }
+                }
+                CommitHeaderObject::EncryptedContent(content) => {
+                    let (_, decrypted_content) =
+                        Block::new_with_encrypted_content(content, None).read(&header_ref.key)?;
+                    match serde_bare::from_slice(&decrypted_content) {
+                        Ok(ObjectContent::V0(ObjectContentV0::CommitHeader(commit_header))) => {
+                            Ok((Some(commit_header), vec![]))
+                        }
+                        Err(_e) => return Err(ObjectParseError::InvalidHeader),
+                        _ => return Err(ObjectParseError::InvalidHeader),
+                    }
+                }
+            },
+            None => Ok((None, vec![])),
+        }
+    }
+
     /// Load an Object from BlockStorage
     ///
     /// Returns Ok(Object) or an Err(ObjectParseError::MissingBlocks(Vec<ObjectId>)) of missing BlockIds
@@ -485,14 +532,7 @@ impl Object {
             root.set_key(key);
         }
 
-        let header = match root.header_ref() {
+        let header = match Self::load_header_(root, store) {
-            Some(header_ref) => match header_ref.obj {
-                CommitHeaderObject::None | CommitHeaderObject::RandomAccess => {
-                    panic!("shouldn't happen")
-                }
-                CommitHeaderObject::Id(id) => {
-                    let obj_res = Object::load(id, Some(header_ref.key.clone()), store);
-                    match obj_res {
             Err(ObjectParseError::MissingBlocks(m)) => {
                 return Err(ObjectParseError::MissingHeaderBlocks((
                     Object {
@@ -507,35 +547,14 @@ impl Object {
                 )));
             }
             Err(e) => return Err(e),
-                        Ok(obj) => match obj.content()? {
+            Ok(h) => h,
-                            ObjectContent::V0(ObjectContentV0::CommitHeader(mut commit_header)) => {
-                                commit_header.set_id(id);
-                                (Some(commit_header), Some(obj.blocks().cloned().collect()))
-                            }
-                            _ => return Err(ObjectParseError::InvalidHeader),
-                        },
-                    }
-                }
-                CommitHeaderObject::EncryptedContent(content) => {
-                    let (_, decrypted_content) =
-                        Block::new_with_encrypted_content(content, None).read(&header_ref.key)?;
-                    match serde_bare::from_slice(&decrypted_content) {
-                        Ok(ObjectContent::V0(ObjectContentV0::CommitHeader(commit_header))) => {
-                            (Some(commit_header), None)
-                        }
-                        Err(_e) => return Err(ObjectParseError::InvalidHeader),
-                        _ => return Err(ObjectParseError::InvalidHeader),
-                    }
-                }
-            },
-            None => (None, None),
         };
 
         Ok(Object {
             blocks,
             block_contents,
             header: header.0,
-            header_blocks: header.1.unwrap_or(vec![]),
+            header_blocks: header.1,
             #[cfg(test)]
             already_saved: true,
         })

ng-repo/src/store.rs

@@ -15,7 +15,7 @@ use core::fmt;
 use std::collections::{HashMap, HashSet};
 use std::sync::{Arc, RwLock};
 
-use crate::block_storage::BlockStorage;
+use crate::block_storage::{BlockStorage, HashMapBlockStorage};
 use crate::errors::{NgError, StorageError};
 use crate::object::Object;
 use crate::repo::{BranchInfo, Repo};
@@ -60,6 +60,29 @@ impl fmt::Debug for Store {
 }
 
 impl Store {
+    pub fn new_temp_in_mem() -> Self {
+        Store {
+            store_repo: StoreRepo::nil(),
+            store_readcap: ReadCap::nil(),
+            store_overlay_branch_readcap: ReadCap::nil(),
+            overlay_id: OverlayId::nil(),
+            storage: Arc::new(RwLock::new(HashMapBlockStorage::new())),
+        }
+    }
+
+    pub fn new_from_overlay_id(
+        overlay: &OverlayId,
+        storage: Arc<RwLock<dyn BlockStorage + Send + Sync>>,
+    ) -> Store {
+        Store {
+            store_repo: StoreRepo::nil(),
+            store_readcap: ReadCap::nil(),
+            store_overlay_branch_readcap: ReadCap::nil(),
+            overlay_id: overlay.clone(),
+            storage,
+        }
+    }
+
     pub fn new_from(
         update: &StoreUpdate,
         storage: Arc<RwLock<dyn BlockStorage + Send + Sync>>,
@@ -125,7 +148,7 @@ impl Store {
         self.storage
             .write()
             .map_err(|_| StorageError::BackendError)?
-            .put(&self.overlay_id, block)
+            .put(&self.overlay_id, block, true)
     }
 
     /// Delete a block from the storage.

ng-repo/src/types.rs

@@ -728,6 +728,11 @@ impl StoreRepo {
         StoreRepo::V0(StoreRepoV0::PublicStore(repo_pubkey))
     }
 
+    pub fn nil() -> Self {
+        let store_pubkey = PubKey::nil();
+        StoreRepo::V0(StoreRepoV0::PublicStore(store_pubkey))
+    }
+
     pub fn new_private(repo_pubkey: PubKey) -> Self {
         StoreRepo::V0(StoreRepoV0::PrivateStore(repo_pubkey))
     }

ng-storage-rocksdb/src/block_storage.rs

@@ -118,13 +118,22 @@ impl BlockStorage for RocksDbBlockStorage {
     }
 
     /// Save a block to the storage.
-    fn put(&self, overlay: &OverlayId, block: &Block) -> Result<BlockId, StorageError> {
+    fn put(&self, overlay: &OverlayId, block: &Block, lazy: bool) -> Result<BlockId, StorageError> {
-        // TODO? return an error if already present in blockstorage?
+        // TODO? return an error if already present in blockstorage and !lazy ?
         let block_id = block.id();
         let ser = serde_bare::to_vec(block)?;
         let tx = self.db.transaction();
-        tx.put(Self::compute_key(overlay, &block_id), &ser)
+        let key = Self::compute_key(overlay, &block_id);
-            .map_err(|_e| StorageError::BackendError)?;
+        if (lazy) {
+            if let Some(block_ser) = tx
+                .get(key.clone())
+                .map_err(|_e| StorageError::BackendError)?
+            {
+                let block: Block = serde_bare::from_slice(&block_ser)?;
+                return Ok(block.id());
+            }
+        }
+        tx.put(key, &ser).map_err(|_e| StorageError::BackendError)?;
         tx.commit().map_err(|_| StorageError::BackendError)?;
         Ok(block_id)
     }