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use std::collections::HashSet;
use std::ops::Deref;
use identity_iota_core::did::IotaDID;
use identity_iota_core::diff::DiffMessage;
use identity_iota_core::document::IotaDocument;
use identity_iota_core::tangle::Message;
use identity_iota_core::tangle::MessageId;
use serde;
use serde::Deserialize;
use serde::Serialize;
use crate::chain::DiffChain;
use crate::chain::IntegrationChain;
use crate::document::ResolvedIotaDocument;
use crate::error::Result;
use crate::tangle::Client;
use crate::tangle::MessageExt;
use crate::tangle::MessageIndex;
use crate::tangle::TangleRef;
#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct DocumentHistory {
#[serde(rename = "integrationChainData")]
pub integration_chain_data: Vec<ResolvedIotaDocument>,
#[serde(rename = "integrationChainSpam")]
pub integration_chain_spam: Vec<MessageId>,
#[deprecated(since = "0.5.0", note = "diff chain features are slated for removal")]
#[serde(rename = "diffChainData")]
pub diff_chain_data: Vec<DiffMessage>,
#[deprecated(since = "0.5.0", note = "diff chain features are slated for removal")]
#[serde(rename = "diffChainSpam")]
pub diff_chain_spam: Vec<MessageId>,
}
impl DocumentHistory {
pub async fn read(client: &Client, did: &IotaDID) -> Result<Self> {
let integration_messages: Vec<Message> = client.read_messages(did.tag()).await?;
let integration_chain = IntegrationChain::try_from_messages(did, &integration_messages, client).await?;
let diff_index: String = IotaDocument::diff_index(integration_chain.current_message_id())?;
let diff_messages: Vec<Message> = client.read_messages(&diff_index).await?;
let diff_chain: DiffChain = DiffChain::try_from_messages(&integration_chain, &diff_messages, client).await?;
let integration_chain_history: ChainHistory<ResolvedIotaDocument> =
ChainHistory::from((integration_chain, integration_messages.deref()));
let diff_chain_history: ChainHistory<DiffMessage> = ChainHistory::from((diff_chain, diff_messages.deref()));
Ok(Self {
integration_chain_data: integration_chain_history.chain_data,
integration_chain_spam: integration_chain_history.spam,
diff_chain_data: diff_chain_history.chain_data,
diff_chain_spam: diff_chain_history.spam,
})
}
}
#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct ChainHistory<T> {
#[serde(rename = "chainData")]
pub chain_data: Vec<T>,
pub spam: Vec<MessageId>,
}
impl<T> ChainHistory<T>
where
T: TangleRef,
{
pub fn separate_spam(chain_data: &[T], messages: &[Message]) -> Vec<MessageId> {
let chain_message_id_set: HashSet<MessageId> = chain_data.iter().map(TangleRef::message_id).cloned().collect();
messages
.iter()
.filter_map(|message| Some(message.id().0).filter(|id| !chain_message_id_set.contains(id)))
.collect()
}
}
impl ChainHistory<DiffMessage> {
pub async fn try_from_raw_messages(
document: &ResolvedIotaDocument,
messages: &[Message],
client: &Client,
) -> Result<Self> {
let did: &IotaDID = document.document.id();
let index: MessageIndex<DiffMessage> = messages
.iter()
.flat_map(|message| message.try_extract_diff(did))
.collect();
let diff_chain = DiffChain::try_from_index_with_document(document, index, client).await?;
Ok(Self::from((diff_chain, messages)))
}
}
impl From<(IntegrationChain, &[Message])> for ChainHistory<ResolvedIotaDocument> {
fn from((integration_chain, messages): (IntegrationChain, &[Message])) -> Self {
let chain_data: Vec<ResolvedIotaDocument> = Vec::from(integration_chain);
let spam: Vec<MessageId> = ChainHistory::separate_spam(&chain_data, messages);
Self { chain_data, spam }
}
}
impl From<(DiffChain, &[Message])> for ChainHistory<DiffMessage> {
fn from((diff_chain, messages): (DiffChain, &[Message])) -> Self {
let chain_data: Vec<DiffMessage> = Vec::from(diff_chain);
let spam: Vec<MessageId> = ChainHistory::separate_spam(&chain_data, messages);
Self { chain_data, spam }
}
}