lindera-wasm 2.3.2

A morphological analysis library for WebAssembly.
Documentation 
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use wasm_bindgen::prelude::*;

use lindera::dictionary::{FieldDefinition, FieldType, Schema};

/// Field type in dictionary schema.
#[wasm_bindgen(js_name = "FieldType")]
#[derive(Debug, Clone, Copy)]
pub enum JsFieldType {
    /// Surface form (word text)
    Surface,
    /// Left context ID for morphological analysis
    LeftContextId,
    /// Right context ID for morphological analysis
    RightContextId,
    /// Word cost (used in path selection)
    Cost,
    /// Custom field (morphological features)
    Custom,
}

impl From<FieldType> for JsFieldType {
    fn from(field_type: FieldType) -> Self {
        match field_type {
            FieldType::Surface => JsFieldType::Surface,
            FieldType::LeftContextId => JsFieldType::LeftContextId,
            FieldType::RightContextId => JsFieldType::RightContextId,
            FieldType::Cost => JsFieldType::Cost,
            FieldType::Custom => JsFieldType::Custom,
        }
    }
}

impl From<JsFieldType> for FieldType {
    fn from(field_type: JsFieldType) -> Self {
        match field_type {
            JsFieldType::Surface => FieldType::Surface,
            JsFieldType::LeftContextId => FieldType::LeftContextId,
            JsFieldType::RightContextId => FieldType::RightContextId,
            JsFieldType::Cost => FieldType::Cost,
            JsFieldType::Custom => FieldType::Custom,
        }
    }
}

/// Field definition in dictionary schema.
#[wasm_bindgen(js_name = "FieldDefinition")]
#[derive(Clone)]
pub struct JsFieldDefinition {
    pub index: usize,
    #[wasm_bindgen(getter_with_clone)]
    pub name: String,
    pub field_type: JsFieldType,
    #[wasm_bindgen(getter_with_clone)]
    pub description: Option<String>,
}

#[wasm_bindgen]
impl JsFieldDefinition {
    #[wasm_bindgen(constructor)]
    pub fn new(
        index: usize,
        name: String,
        field_type: JsFieldType,
        description: Option<String>,
    ) -> Self {
        Self {
            index,
            name,
            field_type,
            description,
        }
    }
}

impl From<FieldDefinition> for JsFieldDefinition {
    fn from(field_def: FieldDefinition) -> Self {
        JsFieldDefinition {
            index: field_def.index,
            name: field_def.name,
            field_type: field_def.field_type.into(),
            description: field_def.description,
        }
    }
}

impl From<JsFieldDefinition> for FieldDefinition {
    fn from(field_def: JsFieldDefinition) -> Self {
        FieldDefinition {
            index: field_def.index,
            name: field_def.name,
            field_type: field_def.field_type.into(),
            description: field_def.description,
        }
    }
}

/// Dictionary schema definition.
#[wasm_bindgen(js_name = "Schema")]
#[derive(Clone)]
pub struct JsSchema {
    pub(crate) inner: Schema,
}

#[wasm_bindgen]
impl JsSchema {
    #[wasm_bindgen(constructor)]
    pub fn new(fields: Vec<String>) -> Self {
        Self {
            inner: Schema::new(fields),
        }
    }

    pub fn create_default() -> Self {
        Self {
            inner: Schema::default(),
        }
    }

    pub fn get_field_index(&self, field_name: &str) -> Option<usize> {
        self.inner.get_field_index(field_name)
    }

    pub fn field_count(&self) -> usize {
        self.inner.get_all_fields().len()
    }

    pub fn get_field_name(&self, index: usize) -> Option<String> {
        self.inner.get_all_fields().get(index).cloned()
    }

    pub fn get_custom_fields(&self) -> Vec<String> {
        let fields = self.inner.get_all_fields();
        if fields.len() > 4 {
            fields[4..].to_vec()
        } else {
            Vec::new()
        }
    }

    pub fn get_all_fields(&self) -> Vec<String> {
        self.inner.get_all_fields().to_vec()
    }

    pub fn get_field_by_name(&self, name: &str) -> Option<JsFieldDefinition> {
        self.get_field_index(name).map(|index| {
            let field_type = if index < 4 {
                match index {
                    0 => JsFieldType::Surface,
                    1 => JsFieldType::LeftContextId,
                    2 => JsFieldType::RightContextId,
                    3 => JsFieldType::Cost,
                    _ => unreachable!(),
                }
            } else {
                JsFieldType::Custom
            };

            JsFieldDefinition {
                index,
                name: name.to_string(),
                field_type,
                description: None,
            }
        })
    }
}

impl From<Schema> for JsSchema {
    fn from(schema: Schema) -> Self {
        JsSchema { inner: schema }
    }
}

impl From<JsSchema> for Schema {
    fn from(schema: JsSchema) -> Self {
        schema.inner
    }
}