WIP: lvmap + encoder

lib/src/application/services.rs

@@ -19,7 +19,7 @@ impl<'a, R: DictRepository> DictImporter<'a, R> {
         mut source: impl DictSource,
     ) -> Result<(), anyhow::Error> {
         // 1. Ensure Dict exists (Logic: Create if new, or maybe clear existing?)
-        self.repo.create(name).await?;
+        self.repo.create_dict(name).await?;
 
         let mut batch = Vec::with_capacity(self.batch_size);
 

lib/src/core/entities.rs

@@ -19,6 +19,7 @@ impl DictEntry {
     }
 }
 
+#[derive(Debug, Clone)]
 pub struct Dict {
     pub name: String,
     pub entries: HashMap<DictEntryId, DictEntry>,
@@ -37,11 +38,19 @@ impl Dict {
     }
 }
 
-// pub struct DecodedItem {
-//     pub value: String,
-// }
+#[derive(Debug, Clone)]
+pub struct EncodedItem {
+    pub entry: DictEntry,
+}
 
-// pub struct DecodedResult {
-//     pub input: String,
-//     pub output: Vec<DecodedItem>,
-// }
+impl EncodedItem {
+    pub fn value(&self) -> &str {
+        &self.entry.text
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct EncodingResult {
+    pub input: String,
+    pub output: Vec<EncodedItem>,
+}

lib/src/core/errors.rs

@@ -9,3 +9,11 @@ pub enum RepositoryError {
     #[error("Storage error: {0}")]
     StorageError(String),
 }
+
+#[derive(Error, Debug)]
+pub enum EncoderError {
+    #[error("Encoder initialization failed")]
+    InitializationFailed,
+    #[error("Unexpected error: {0}")]
+    UnexpectedError(String),
+}

lib/src/core/sys_major.rs

@@ -1,4 +1,6 @@
 mod decoder;
+mod encoder;
+mod lvmap;
 pub mod rules_en;
 pub mod rules_pl;
 
@@ -6,3 +8,5 @@ pub mod rules_pl;
 mod decoder_tests;
 
 pub use decoder::*;
+pub use encoder::*;
+pub use lvmap::LenValueMap;

lib/src/core/sys_major/encoder.rs

@@ -0,0 +1,23 @@
+use crate::core::{
+    entities::EncodingResult, errors::EncoderError, sys_major::LenValueMap, traits::*,
+};
+
+#[derive(Debug)]
+pub struct Encoder {
+    lv_map: LenValueMap,
+}
+
+impl Encoder {
+    pub fn new(lv_map: LenValueMap) -> Self {
+        Encoder { lv_map }
+    }
+}
+
+impl SystemEncoder for Encoder {
+    fn initialize(&self) -> Result<(), EncoderError> {
+        Ok(())
+    }
+    fn encode(&self, word: &str) -> Result<EncodingResult, EncoderError> {
+        todo!()
+    }
+}

lib/src/core/sys_major/lvmap.rs

@@ -0,0 +1,197 @@
+use std::collections::HashMap;
+
+use crate::core::{DictRepository, SystemEncoder};
+
+// We store words by encoded number length, then encoded value
+// Example:
+// root:
+//   - 3:
+//     - 750:
+//       - word: klasa
+//       - word: gilza
+//     - 849:
+//       - word: farba
+//   - 2:
+//     - 45:
+//       - word: oral
+
+const DEFAULT_DICT_BATCH_SIZE: usize = 100;
+
+type ValueLength = u8;
+type Value = u64;
+pub type LenValueData = HashMap<ValueLength, HashMap<Value, Vec<String>>>;
+
+#[derive(Debug)]
+pub struct LenValueMap {
+    map: LenValueData,
+    batch_size: usize,
+}
+
+impl LenValueMap {
+    pub fn new() -> Self {
+        LenValueMap {
+            map: LenValueData::new(),
+            batch_size: DEFAULT_DICT_BATCH_SIZE,
+        }
+    }
+    pub fn with_data(mut self, data: LenValueData) -> Self {
+        self.map = data;
+        self
+    }
+
+    pub fn with_batch_size(mut self, batch_size: usize) -> Self {
+        self.batch_size = batch_size;
+        self
+    }
+
+    pub fn build<E: SystemEncoder, R: DictRepository>(encoder: &E, repo: &R) -> Self {
+        let mut map = LenValueData::new();
+
+        LenValueMap::new().with_data(map)
+    }
+
+    pub fn is_empty(&self) -> bool {
+        self.map.is_empty()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::core::{entities::*, errors::*};
+    use std::collections::HashMap;
+
+    #[test]
+    fn test_no_inpout_then_empty_map() {
+        let repo = MockRepository::new().with_single_word_dict();
+        let encoder = MockEncoder::new(EncodingResult {
+            input: "".to_string(),
+            output: vec![],
+        });
+        let lv_map = LenValueMap::build(&encoder, &repo);
+        assert!(lv_map.is_empty());
+    }
+
+    // #[test]
+    // fn test_empty_dict_then_no_output() {
+    //     let dict = Dict {
+    //         name: "test".to_string(),
+    //         entries: HashMap::new(),
+    //     };
+    //     let repo = MockRepository::new(dict);
+    //     let encoder = Encoder::new(&repo);
+    //     let result = encoder.encode("test").unwrap();
+    //     assert!(result.output.is_empty());
+    // }
+
+    // #[test]
+    // fn test_encode_single_digit() {
+    //     let dict = get_single_word_dict();
+    //     let repo = MockRepository::new(dict);
+    //     let encoder = Encoder::new(&repo).with_batch_size(1);
+    //     let result = encoder.encode("test").unwrap();
+    //     assert!(result.output.is_empty());
+    // }
+
+    // ---------- Helpers ----------
+
+    fn get_single_word_dict() -> Dict {
+        Dict {
+            name: "test_dict".to_string(),
+            entries: HashMap::from([(
+                1,
+                DictEntry {
+                    id: Some(1),
+                    text: "test_word_1".to_string(),
+                    metadata: HashMap::new(),
+                },
+            )]),
+        }
+    }
+
+    // ---------- Mocks ----------
+
+    struct MockEncoder {
+        result: EncodingResult,
+    }
+
+    impl MockEncoder {
+        fn new(result: EncodingResult) -> Self {
+            MockEncoder { result }
+        }
+    }
+
+    impl SystemEncoder for MockEncoder {
+        fn initialize(&self) -> Result<(), EncoderError> {
+            Ok(())
+        }
+
+        fn encode(&self, _word: &str) -> Result<EncodingResult, EncoderError> {
+            Ok(self.result.clone())
+        }
+    }
+
+    struct MockRepository {
+        dict: Dict,
+    }
+
+    impl MockRepository {
+        pub fn new() -> Self {
+            MockRepository {
+                dict: Dict::new("test_dict".to_string()),
+            }
+        }
+
+        pub fn with_single_word_dict(mut self) -> Self {
+            self.dict = get_single_word_dict();
+            self
+        }
+    }
+
+    #[async_trait::async_trait]
+    impl DictRepository for MockRepository {
+        async fn create_dict(&self, _name: &str) -> Result<(), RepositoryError> {
+            Ok(())
+        }
+
+        async fn save_entries(
+            &self,
+            _dict_name: &str,
+            _entries: &[DictEntry],
+        ) -> Result<(), RepositoryError> {
+            todo!()
+        }
+
+        async fn fetch_many(
+            &self,
+            _name: &str,
+            limit: Option<u32>,
+            offset: Option<u32>,
+        ) -> Result<Dict, RepositoryError> {
+            let offset = offset.unwrap_or(0) as usize;
+            let limit = limit.unwrap_or(u32::MAX) as usize;
+
+            let mut entries_vec: Vec<_> = self.dict.entries.iter().collect();
+            entries_vec.sort_by_key(|&(id, _)| *id);
+
+            let paginated = entries_vec.into_iter().skip(offset).take(limit);
+            let paginated_map: HashMap<u64, DictEntry> = paginated
+                .map(|(id, entry)| {
+                    (
+                        *id,
+                        DictEntry {
+                            id: entry.id,
+                            text: entry.text.clone(),
+                            metadata: entry.metadata.clone(),
+                        },
+                    )
+                })
+                .collect();
+
+            Ok(Dict {
+                name: self.dict.name.clone(),
+                entries: paginated_map,
+            })
+        }
+    }
+}

lib/src/core/traits.rs

@@ -1,18 +1,27 @@
+use crate::core::entities::EncodingResult;
+use crate::core::errors::EncoderError;
+
 use super::entities::{Dict, DictEntry};
 use super::errors::RepositoryError;
 
+/// The number value can be encoded as many word sets,
+/// but decoded as one number. For partial values, we can use
+/// u64, but for the whole decoded value that may be very long,
+/// we need a string.
+type DecodedValue = String;
+
 pub trait SystemDecoder {
-    fn decode(&self, word: &str) -> String;
+    fn decode(&self, word: &str) -> DecodedValue;
 }
 
-// pub trait SystenDecoder {
-//     fn initialize(&self) -> Result<(), anyhow::Error>;
-
-// }
+pub trait SystemEncoder {
+    fn initialize(&self) -> Result<(), EncoderError>;
+    fn encode(&self, word: &str) -> Result<EncodingResult, EncoderError>;
+}
 
 #[async_trait::async_trait]
 pub trait DictRepository: Send + Sync {
-    async fn create(&self, name: &str) -> Result<(), RepositoryError>;
+    async fn create_dict(&self, name: &str) -> Result<(), RepositoryError>;
 
     /// "Upsert" logic:
     /// - If entry exists (by text), update metadata.

lib/src/infrastructure/sqlite_dict_repository.rs

@@ -87,7 +87,7 @@ impl SqliteDictRepository {
 
 #[async_trait::async_trait]
 impl DictRepository for SqliteDictRepository {
-    async fn create(&self, name: &str) -> Result<(), RepositoryError> {
+    async fn create_dict(&self, name: &str) -> Result<(), RepositoryError> {
         sqlx::query("INSERT OR IGNORE INTO dictionaries (name) VALUES (?)")
             .bind(name)
             .execute(&self.pool)