docs(desktop): add query docs

desktopData/src/main/kotlin/com/intelligentbackpack/desktopdata/db/DesktopDAO.kt

@@ -58,43 +58,108 @@ internal interface DesktopDAO {
     @Insert(onConflict = OnConflictStrategy.ABORT)
     fun addSchoolSupply(schoolSupply: SchoolSupply)
 
+    /**
+     * Add a wrote relation to the database
+     *
+     * @param wrote the wrote relation to add
+     */
     @Insert(onConflict = OnConflictStrategy.IGNORE)
     fun addWrote(wrote: Wrote)
 
+    /**
+     * Change the field in_backpack of a school supply to true
+     *
+     * @param rfid the rfid of the school supplies to put in the backpack
+     */
     @Query("UPDATE school_supplies SET in_backpack = 1 WHERE rfid IN (:rfid)")
     fun putSchoolSuppliesInBackpack(rfid: Set<String>)
 
+    /**
+     * Change the field in_backpack of a school supply to false
+     *
+     * @param rfid the rfid of the school supplies to take from the backpack
+     */
     @Query("UPDATE school_supplies SET in_backpack = 0 WHERE rfid IN (:rfid)")
     fun takeSchoolSuppliesFromBackpack(rfid: Set<String>)
 
+    /**
+     * Get all the authors
+     *
+     * @return the authors
+     */
     @Query("SELECT * FROM Authors WHERE name = :name")
     fun getAuthors(name: String): List<Author>
 
+    /**
+     * Get an author from its id
+     *
+     * @param authorId the author id
+     * @return the author
+     */
     @Query("SELECT * FROM Authors WHERE author_id = :authorId")
     fun getAuthor(authorId: Long): Author
 
+    /**
+     * Get all school supply types
+     *
+     * @return the school supply types
+     */
     @Query("SELECT * FROM School_supply_types")
     fun getSchoolSupplyTypes(): List<SchoolSupplyType>
 
+    /**
+     * Get a school supply type from its name
+     *
+     * @param type the school supply type name
+     * @return the school supply type
+     */
     @Query("SELECT * FROM School_supply_types WHERE type = :type")
     fun getSchoolSupplyTypesFromName(type: String): List<SchoolSupplyType>
 
+    /**
+     * Get all books
+     *
+     * @return the books
+     */
     @Transaction
     @Query("SELECT * FROM Books")
     fun getBooks(): List<BookWithAuthors>
 
+    /**
+     * Get a book from its isbn
+     *
+     * @param isbn the book isbn
+     * @return the book
+     */
     @Transaction
     @Query("SELECT * FROM Books WHERE isbn = :isbn")
     fun getBook(isbn: String): BookWithAuthors?
 
+    /**
+     * Get all book copy from the rfid
+     *
+     * @param rfid the book copy rfid
+     * @return the book copy
+     */
     @Transaction
     @Query("SELECT * FROM Book_copies WHERE rfid = :rfid")
-    fun getBookCopy(rfid: String): List<BookCopyWithAuthors>
+    fun getBookCopy(rfid: String): BookCopyWithAuthors?
 
+    /**
+     * Get all book copies in the backpack
+     *
+     * @return the book copies in the backpack
+     */
     @Transaction
     @Query("SELECT * FROM Book_copies WHERE in_backpack = 1")
     fun getBookCopiesInBackpack(): List<BookCopyWithAuthors>
 
+    /**
+     * Get the school supply type from the rfid
+     *
+     * @param rfid the school supply
+     * @return the school supply type
+     */
     @Transaction
     @Query(
         "SELECT School_supply_types.type" +
@@ -103,6 +168,11 @@ internal interface DesktopDAO {
     )
     fun getSchoolSupplyType(rfid: String): String?
 
+    /**
+     * Get all school supplies' rfid
+     *
+     * @return the school supplies' rfid
+     */
     @Transaction
     @Query("SELECT rfid FROM School_supplies")
     fun getAllSchoolSupplyRfid(): List<String>