Restructure

client.go

@@ -0,0 +1,109 @@
+package main
+
+import (
+	"github.com/jmoiron/sqlx"
+	"reflect"
+)
+
+const (
+	SQL_INFO         = "SELECT version(), user, current_database(), inet_client_addr(), inet_client_port(), inet_server_addr(), inet_server_port()"
+	SQL_TABLES       = "SELECT table_name FROM information_schema.tables WHERE table_schema = 'public' ORDER BY table_schema,table_name;"
+	SQL_TABLE_SCHEMA = "SELECT column_name, data_type, is_nullable, character_maximum_length, character_set_catalog, column_default FROM information_schema.columns where table_name = '%s';"
+)
+
+type Client struct {
+	db *sqlx.DB
+}
+
+type Result struct {
+	Columns []string        `json:"columns"`
+	Rows    [][]interface{} `json:"rows"`
+}
+
+func NewError(err error) Error {
+	return Error{err.Error()}
+}
+
+func NewClient() (*Client, error) {
+	db, err := sqlx.Open("postgres", getConnectionString())
+
+	if err != nil {
+		return nil, err
+	}
+
+	return &Client{db: db}, nil
+}
+
+func (client *Client) Tables() ([]string, error) {
+	res, err := client.Query(SQL_TABLES)
+
+	if err != nil {
+		return nil, err
+	}
+
+	var tables []string
+
+	for _, row := range res.Rows {
+		tables = append(tables, row[0].(string))
+	}
+
+	return tables, nil
+}
+
+func (client *Client) Query(query string) (*Result, error) {
+	rows, err := client.db.Queryx(query)
+
+	if err != nil {
+		return nil, err
+	}
+
+	defer rows.Close()
+
+	cols, err := rows.Columns()
+
+	if err != nil {
+		return nil, err
+	}
+
+	result := Result{
+		Columns: cols,
+	}
+
+	for rows.Next() {
+		obj, err := rows.SliceScan()
+
+		for i, item := range obj {
+			if item == nil {
+				obj[i] = nil
+			} else {
+				t := reflect.TypeOf(item).Kind().String()
+
+				if t == "slice" {
+					obj[i] = string(item.([]byte))
+				}
+			}
+		}
+
+		if err == nil {
+			result.Rows = append(result.Rows, obj)
+		}
+	}
+
+	return &result, nil
+}
+
+func (res *Result) Format() []map[string]interface{} {
+	var items []map[string]interface{}
+
+	for _, row := range res.Rows {
+		item := make(map[string]interface{})
+
+		for i, c := range res.Columns {
+			item[c] = row[i]
+		}
+
+		items = append(items, item)
+	}
+
+	return items
+}