GET v1/users is now actually pretty darn cool

app/v1/manage_user.go

@@ -44,5 +44,5 @@ LEFT JOIN users_stats
 ON users.id=users_stats.id
 WHERE users.id=?
 LIMIT 1`
-	return userPuts(md, md.DB.QueryRowx(query, data.UserID))
+	return userPutsSingle(md, md.DB.QueryRowx(query, data.UserID))
 }

app/v1/user.go

@@ -22,33 +22,36 @@ type userData struct {
 	Country        string               `json:"country"`
 }
 
-// UsersGET is the API handler for GET /users
-func UsersGET(md common.MethodData) common.CodeMessager {
-	shouldRet, whereClause, param := whereClauseUser(md, "users")
-	if shouldRet != nil {
-		return *shouldRet
-	}
-
-	query := `
-SELECT users.id, users.username, register_datetime, privileges,
+const userFields = `users.id, users.username, register_datetime, privileges,
 	latest_activity, users_stats.username_aka,
 	users_stats.country
 FROM users
 INNER JOIN users_stats
 ON users.id=users_stats.id
+`
+
+// UsersGET is the API handler for GET /users
+func UsersGET(md common.MethodData) common.CodeMessager {
+	shouldRet, whereClause, param := whereClauseUser(md, "users")
+	if shouldRet != nil {
+		return userPutsMulti(md)
+	}
+
+	query := `
+SELECT ` + userFields + `
 WHERE ` + whereClause + ` AND ` + md.User.OnlyUserPublic(true) + `
 LIMIT 1`
-	return userPuts(md, md.DB.QueryRowx(query, param))
+	return userPutsSingle(md, md.DB.QueryRowx(query, param))
 }
 
-type userPutsUserData struct {
+type userPutsSingleUserData struct {
 	common.ResponseBase
 	userData
 }
 
-func userPuts(md common.MethodData, row *sqlx.Row) common.CodeMessager {
+func userPutsSingle(md common.MethodData, row *sqlx.Row) common.CodeMessager {
 	var err error
-	var user userPutsUserData
+	var user userPutsSingleUserData
 
 	err = row.StructScan(&user.userData)
 	switch {
@@ -63,6 +66,62 @@ func userPuts(md common.MethodData, row *sqlx.Row) common.CodeMessager {
 	return user
 }
 
+type userPutsMultiUserData struct {
+	common.ResponseBase
+	Users []userData `json:"users"`
+}
+
+func userPutsMulti(md common.MethodData) common.CodeMessager {
+	q := md.C.Request.URL.Query()
+
+	// query composition
+	wh := common.
+		Where("users.username = ?", md.Query("nname")).
+		Where("users.id = ?", md.Query("iid")).
+		Where("users.privileges = ?", md.Query("privileges")).
+		Where("users.privileges & ? > 0", md.Query("has_privileges")).
+		Where("users_stats.country = ?", md.Query("country")).
+		Where("users_stats.username_aka = ?", md.Query("name_aka")).
+		In("users.id", q["ids"]...).
+		In("users.username", q["names"]...).
+		In("users_stats.username_aka", q["names_aka"]...).
+		In("users_stats.country", q["countries"]...)
+	query := "" +
+		"SELECT " + userFields + wh.ClauseSafe() + " AND " + md.User.OnlyUserPublic(true) +
+		" " + common.Sort(md, common.SortConfiguration{
+		Allowed: []string{
+			"id",
+			"username",
+			"privileges",
+			"donor_expire",
+			"latest_activity",
+			"silence_end",
+		},
+		Default: "id ASC",
+		Table:   "users",
+	}) +
+		" " + common.Paginate(md.Query("p"), md.Query("l"), 100)
+
+	// query execution
+	rows, err := md.DB.Queryx(query, wh.Params...)
+	if err != nil {
+		md.Err(err)
+		return Err500
+	}
+	var r userPutsMultiUserData
+	for rows.Next() {
+		var u userData
+		err := rows.StructScan(&u)
+		if err != nil {
+			md.Err(err)
+			continue
+		}
+		r.Users = append(r.Users, u)
+	}
+	r.Code = 200
+	return r
+}
+
 // UserSelfGET is a shortcut for /users/id/self. (/users/self)
 func UserSelfGET(md common.MethodData) common.CodeMessager {
 	md.C.Request.URL.RawQuery = "id=self&" + md.C.Request.URL.RawQuery

common/where.go

@@ -15,17 +15,58 @@ func (w *WhereClause) Where(clause, passedParam string, allowedValues ...string)
 	if len(allowedValues) != 0 && !contains(allowedValues, passedParam) {
 		return w
 	}
-	// checks passed, if string is empty add "WHERE"
+	w.addWhere()
+	w.Clause += clause
+	w.Params = append(w.Params, passedParam)
+	return w
+}
+
+func (w *WhereClause) addWhere() {
+	// if string is empty add "WHERE", else add AND
 	if w.Clause == "" {
 		w.Clause += "WHERE "
 	} else {
 		w.Clause += " AND "
 	}
-	w.Clause += clause
-	w.Params = append(w.Params, passedParam)
+}
+
+// In generates an IN clause.
+// initial is the initial part, e.g. "users.id".
+// Fields are the possible values.
+// Sample output: users.id IN ('1', '2', '3')
+func (w *WhereClause) In(initial string, fields ...string) *WhereClause {
+	if len(fields) == 0 {
+		return w
+	}
+	w.addWhere()
+	w.Clause += initial + " IN (" + generateQuestionMarks(len(fields)) + ")"
+	fieldsInterfaced := make([]interface{}, 0, len(fields))
+	for _, i := range fields {
+		fieldsInterfaced = append(fieldsInterfaced, interface{}(i))
+	}
+	w.Params = append(w.Params, fieldsInterfaced...)
 	return w
 }
 
+func generateQuestionMarks(x int) (qm string) {
+	for i := 0; i < x-1; i++ {
+		qm += "?, "
+	}
+	if x > 0 {
+		qm += "?"
+	}
+	return qm
+}
+
+// ClauseSafe returns the clause, always containing something. If w.Clause is
+// empty, it returns "WHERE 1".
+func (w *WhereClause) ClauseSafe() string {
+	if w.Clause == "" {
+		return "WHERE 1"
+	}
+	return w.Clause
+}
+
 // Where is the same as WhereClause.Where, but creates a new WhereClause.
 func Where(clause, passedParam string, allowedValues ...string) *WhereClause {
 	w := new(WhereClause)

common/where_test.go

@@ -0,0 +1,96 @@
+package common
+
+import (
+	"reflect"
+	"testing"
+)
+
+func Test_generateQuestionMarks(t *testing.T) {
+	type args struct {
+		x int
+	}
+	tests := []struct {
+		name   string
+		args   args
+		wantQm string
+	}{
+		{"-1", args{-1}, ""},
+		{"0", args{0}, ""},
+		{"1", args{1}, "?"},
+		{"2", args{2}, "?, ?"},
+	}
+	for _, tt := range tests {
+		if gotQm := generateQuestionMarks(tt.args.x); gotQm != tt.wantQm {
+			t.Errorf("%q. generateQuestionMarks() = %v, want %v", tt.name, gotQm, tt.wantQm)
+		}
+	}
+}
+
+func TestWhereClause_In(t *testing.T) {
+	type args struct {
+		initial string
+		fields  []interface{}
+	}
+	tests := []struct {
+		name   string
+		fields *WhereClause
+		args   args
+		want   *WhereClause
+	}{
+		{
+			"simple",
+			&WhereClause{},
+			args{"users.id", []interface{}{"1", "2", "3"}},
+			&WhereClause{"WHERE users.id IN (?, ?, ?)", []interface{}{"1", "2", "3"}},
+		},
+		{
+			"withExisting",
+			Where("users.username = ?", "Howl").Where("users.xd > ?", "6"),
+			args{"users.id", []interface{}{"1"}},
+			&WhereClause{
+				"WHERE users.username = ? AND users.xd > ? AND users.id IN (?)",
+				[]interface{}{"Howl", "6", "1"},
+			},
+		},
+	}
+	for _, tt := range tests {
+		w := tt.fields
+		if got := w.In(tt.args.initial, tt.args.fields...); !reflect.DeepEqual(got, tt.want) {
+			t.Errorf("%q. WhereClause.In() = %v, want %v", tt.name, got, tt.want)
+		}
+	}
+}
+
+func TestWhere(t *testing.T) {
+	type args struct {
+		clause        string
+		passedParam   string
+		allowedValues []string
+	}
+	tests := []struct {
+		name string
+		args args
+		want *WhereClause
+	}{
+		{
+			"simple",
+			args{"users.id = ?", "5", nil},
+			&WhereClause{"WHERE users.id = ?", []interface{}{"5"}},
+		},
+		{
+			"allowed",
+			args{"users.id = ?", "5", []string{"1", "3", "5"}},
+			&WhereClause{"WHERE users.id = ?", []interface{}{"5"}},
+		},
+		{
+			"notAllowed",
+			args{"users.id = ?", "5", []string{"0"}},
+			&WhereClause{},
+		},
+	}
+	for _, tt := range tests {
+		if got := Where(tt.args.clause, tt.args.passedParam, tt.args.allowedValues...); !reflect.DeepEqual(got, tt.want) {
+			t.Errorf("%q. Where() = %#v, want %#v", tt.name, got, tt.want)
+		}
+	}
+}