Moved contents of seasoned_api up to root folder

src/searchHistory/searchHistory.js

@@ -0,0 +1,57 @@
+const establishedDatabase = require("../database/database");
+
+class SearchHistory {
+  constructor(database) {
+    this.database = database || establishedDatabase;
+    this.queries = {
+      create:
+        "insert into search_history (search_query, user_name) values (?, ?)",
+      read: "select search_query from search_history where user_name = ? order by id desc"
+    };
+  }
+
+  /**
+   * Retrive a search queries for a user from the database.
+   * @param {User} user existing user
+   * @returns {Promise}
+   */
+  read(user) {
+    return new Promise((resolve, reject) =>
+      this.database
+        .all(this.queries.read, user)
+        .then((result, error) => {
+          if (error) throw new Error(error);
+          resolve(result.map(row => row.search_query));
+        })
+        .catch(error => {
+          console.log("Error when fetching history from database:", error);
+          reject("Unable to get history.");
+        })
+    );
+  }
+
+  /**
+   * Creates a new search entry in the database.
+   * @param {String} username logged in user doing the search
+   * @param {String} searchQuery the query the user searched for
+   * @returns {Promise}
+   */
+  create(username, searchQuery) {
+    return this.database
+      .run(this.queries.create, [searchQuery, username])
+      .catch(error => {
+        if (error.message.includes("FOREIGN")) {
+          throw new Error("Could not create search history.");
+        }
+
+        throw {
+          success: false,
+          status: 500,
+          message: "An unexpected error occured",
+          source: "database"
+        };
+      });
+  }
+}
+
+module.exports = SearchHistory;