text-document-common 1.4.0

use crate::database::hashmap_store::{
    HashMapStore, delete_from_backward_junction, junction_get, junction_remove, junction_set,
};
use crate::entities::*;
use crate::error::RepositoryError;
use crate::types::EntityId;
use crate::{impl_relationship_methods, impl_write_relationship_methods};
use std::collections::HashMap;
use std::sync::RwLock;

use super::frame_repository::{FrameRelationshipField, FrameTable, FrameTableRO};

pub struct FrameHashMapTable<'a> {
    store: &'a HashMapStore,
}

impl<'a> FrameHashMapTable<'a> {
    pub fn new(store: &'a HashMapStore) -> Self {
        Self { store }
    }

    fn resolve_junction(
        &self,
        field: &FrameRelationshipField,
    ) -> &RwLock<HashMap<EntityId, Vec<EntityId>>> {
        match field {
            FrameRelationshipField::Blocks => &self.store.jn_block_from_frame_blocks,
            FrameRelationshipField::ParentFrame => &self.store.jn_frame_from_frame_parent_frame,
            FrameRelationshipField::Table => &self.store.jn_table_from_frame_table,
        }
    }

    fn hydrate(&self, entity: &mut Frame) {
        entity.blocks = junction_get(&self.store.jn_block_from_frame_blocks, &entity.id);
        entity.parent_frame =
            junction_get(&self.store.jn_frame_from_frame_parent_frame, &entity.id)
                .into_iter()
                .next();
        entity.table = junction_get(&self.store.jn_table_from_frame_table, &entity.id)
            .into_iter()
            .next();
    }
}

impl<'a> FrameTable for FrameHashMapTable<'a> {
    fn create(&mut self, entity: &Frame) -> Result<Frame, RepositoryError> {
        self.create_multi(std::slice::from_ref(entity))
            .map(|v| v.into_iter().next().unwrap())
    }

    fn create_multi(&mut self, entities: &[Frame]) -> Result<Vec<Frame>, RepositoryError> {
        let mut created = Vec::with_capacity(entities.len());
        let mut frames = self.store.frames.write().unwrap();

        for entity in entities {
            let new_entity = if entity.id == EntityId::default() {
                let id = self.store.next_id("frame");
                Frame {
                    id,
                    ..entity.clone()
                }
            } else {
                if frames.contains_key(&entity.id) {
                    return Err(RepositoryError::DuplicateId {
                        entity: "Frame",
                        id: entity.id,
                    });
                }
                entity.clone()
            };

            frames.insert(new_entity.id, new_entity.clone());
            junction_set(
                &self.store.jn_block_from_frame_blocks,
                new_entity.id,
                new_entity.blocks.clone(),
            );
            junction_set(
                &self.store.jn_frame_from_frame_parent_frame,
                new_entity.id,
                new_entity.parent_frame.into_iter().collect(),
            );
            junction_set(
                &self.store.jn_table_from_frame_table,
                new_entity.id,
                new_entity.table.into_iter().collect(),
            );
            created.push(new_entity);
        }
        Ok(created)
    }

    fn get(&self, id: &EntityId) -> Result<Option<Frame>, RepositoryError> {
        let frames = self.store.frames.read().unwrap();
        match frames.get(id) {
            Some(entity) => {
                let mut e = entity.clone();
                drop(frames);
                self.hydrate(&mut e);
                Ok(Some(e))
            }
            None => Ok(None),
        }
    }

    fn get_multi(&self, ids: &[EntityId]) -> Result<Vec<Option<Frame>>, RepositoryError> {
        let mut result = Vec::with_capacity(ids.len());
        for id in ids {
            result.push(self.get(id)?);
        }
        Ok(result)
    }

    fn get_all(&self) -> Result<Vec<Frame>, RepositoryError> {
        let frames = self.store.frames.read().unwrap();
        let entries: Vec<Frame> = frames.values().cloned().collect();
        drop(frames);
        let mut result = Vec::with_capacity(entries.len());
        for mut entity in entries {
            self.hydrate(&mut entity);
            result.push(entity);
        }
        Ok(result)
    }

    fn update(&mut self, entity: &Frame) -> Result<Frame, RepositoryError> {
        self.update_multi(std::slice::from_ref(entity))
            .map(|v| v.into_iter().next().unwrap())
    }

    fn update_multi(&mut self, entities: &[Frame]) -> Result<Vec<Frame>, RepositoryError> {
        let mut frames = self.store.frames.write().unwrap();
        for entity in entities {
            frames.insert(entity.id, entity.clone());
        }
        drop(frames);
        let ids: Vec<EntityId> = entities.iter().map(|e| e.id).collect();
        let result = self.get_multi(&ids)?;
        Ok(result.into_iter().flatten().collect())
    }

    fn update_with_relationships(&mut self, entity: &Frame) -> Result<Frame, RepositoryError> {
        self.update_with_relationships_multi(std::slice::from_ref(entity))
            .map(|v| v.into_iter().next().unwrap())
    }

    fn update_with_relationships_multi(
        &mut self,
        entities: &[Frame],
    ) -> Result<Vec<Frame>, RepositoryError> {
        let mut frames = self.store.frames.write().unwrap();
        for entity in entities {
            frames.insert(entity.id, entity.clone());
            junction_set(
                &self.store.jn_block_from_frame_blocks,
                entity.id,
                entity.blocks.clone(),
            );
            junction_set(
                &self.store.jn_frame_from_frame_parent_frame,
                entity.id,
                entity.parent_frame.into_iter().collect(),
            );
            junction_set(
                &self.store.jn_table_from_frame_table,
                entity.id,
                entity.table.into_iter().collect(),
            );
        }
        drop(frames);
        let ids: Vec<EntityId> = entities.iter().map(|e| e.id).collect();
        let result = self.get_multi(&ids)?;
        Ok(result.into_iter().flatten().collect())
    }

    fn remove(&mut self, id: &EntityId) -> Result<(), RepositoryError> {
        self.remove_multi(std::slice::from_ref(id))
    }

    fn remove_multi(&mut self, ids: &[EntityId]) -> Result<(), RepositoryError> {
        let mut frames = self.store.frames.write().unwrap();
        for id in ids {
            frames.remove(id);
            junction_remove(&self.store.jn_block_from_frame_blocks, id);
            junction_remove(&self.store.jn_frame_from_frame_parent_frame, id);
            junction_remove(&self.store.jn_table_from_frame_table, id);
            // backward junctions
            delete_from_backward_junction(&self.store.jn_frame_from_table_cell_cell_frame, id);
            delete_from_backward_junction(&self.store.jn_frame_from_document_frames, id);
            // self-referential backward
            delete_from_backward_junction(&self.store.jn_frame_from_frame_parent_frame, id);
        }
        Ok(())
    }

    impl_write_relationship_methods!(FrameHashMapTable<'a>, FrameRelationshipField);
}

pub struct FrameHashMapTableRO<'a> {
    store: &'a HashMapStore,
}

impl<'a> FrameHashMapTableRO<'a> {
    pub fn new(store: &'a HashMapStore) -> Self {
        Self { store }
    }

    fn resolve_junction(
        &self,
        field: &FrameRelationshipField,
    ) -> &RwLock<HashMap<EntityId, Vec<EntityId>>> {
        match field {
            FrameRelationshipField::Blocks => &self.store.jn_block_from_frame_blocks,
            FrameRelationshipField::ParentFrame => &self.store.jn_frame_from_frame_parent_frame,
            FrameRelationshipField::Table => &self.store.jn_table_from_frame_table,
        }
    }

    fn hydrate(&self, entity: &mut Frame) {
        entity.blocks = junction_get(&self.store.jn_block_from_frame_blocks, &entity.id);
        entity.parent_frame =
            junction_get(&self.store.jn_frame_from_frame_parent_frame, &entity.id)
                .into_iter()
                .next();
        entity.table = junction_get(&self.store.jn_table_from_frame_table, &entity.id)
            .into_iter()
            .next();
    }
}

impl<'a> FrameTableRO for FrameHashMapTableRO<'a> {
    fn get(&self, id: &EntityId) -> Result<Option<Frame>, RepositoryError> {
        let frames = self.store.frames.read().unwrap();
        match frames.get(id) {
            Some(entity) => {
                let mut e = entity.clone();
                drop(frames);
                self.hydrate(&mut e);
                Ok(Some(e))
            }
            None => Ok(None),
        }
    }

    fn get_multi(&self, ids: &[EntityId]) -> Result<Vec<Option<Frame>>, RepositoryError> {
        let mut result = Vec::with_capacity(ids.len());
        for id in ids {
            result.push(self.get(id)?);
        }
        Ok(result)
    }

    fn get_all(&self) -> Result<Vec<Frame>, RepositoryError> {
        let frames = self.store.frames.read().unwrap();
        let entries: Vec<Frame> = frames.values().cloned().collect();
        drop(frames);
        let mut result = Vec::with_capacity(entries.len());
        for mut entity in entries {
            self.hydrate(&mut entity);
            result.push(entity);
        }
        Ok(result)
    }

    impl_relationship_methods!(FrameHashMapTableRO<'a>, FrameRelationshipField);
}