Adding an organism-hints model

src/model/hint.js

@@ -0,0 +1,85 @@
+import _ from 'lodash';
+
+const HINT_TYPE = Object.freeze({
+    ORGANISM: 'organism'
+});
+const HINT_TYPES = _.flatMap(HINT_TYPE);
+
+const HINT_PASSAGE = Object.freeze({
+    TITLE: 'title',
+    ABSTRACT: 'abstract'
+});
+const HINT_PASSAGES = _.flatMap(HINT_PASSAGE);
+
+/*
+* Class representing a Hint.
+* A hint is a piece of information that is extracted from sections of articles, such as the title or abstract.
+* It can be about the organism being studied in the article or a gene name under investigation.
+*/
+class Hint{
+
+    /**
+     * Create a Hint.
+     * @param {string} text - The hint text.
+     * @param {string} type - The hint type.
+     * @param {Object} xref - The hint xref.
+     * @param {string} section - The hint section.
+     */
+    constructor(text, type, xref, section){
+        this._text = text;
+        this._type = type;
+        this._xref = xref;
+        this._section = section;
+    }
+
+    /**
+     * Get the hint text.
+     * The text is a single sentence extracted from the article section.
+     * @returns {string} The hint text.
+     */
+    get text(){
+        return this._text;
+    }
+
+    set text(value){
+        this._text = value;
+    }
+
+    get type(){
+        return this._type;
+    }
+
+    set type(value){
+        if( value != HINT_TYPES.ORGANISM){
+            throw new Error('Invalid type' + value);
+        }
+        this._type = value;
+    }
+
+    get xref(){
+        return this._xref;
+    }
+
+    set xref(value){
+        if (!value.dbPrefix || !value.id){
+            throw new Error('Invalid xref' + JSON.stringify(value));
+        }
+        this._xref = value;
+    }
+
+    get section(){
+        return this._section;
+    }
+
+    set section(value){
+        if( value != HINT_PASSAGES.TITLE && value != HINT_PASSAGES.ABSTRACT){
+            throw new Error('Invalid section' + value);
+        }
+        this._section = value;
+    }
+}
+export { 
+    Hint, 
+    HINT_TYPES, 
+    HINT_PASSAGES 
+};