feat:

internal/models/contest.go

@@ -0,0 +1,10 @@
+package models
+
+import "time"
+
+type Contest struct {
+	Id        *int32     `db:"id"`
+	Title     *string    `db:"title"`
+	CreatedAt *time.Time `db:"created_at"`
+	UpdatedAt *time.Time `db:"updated_at"`
+}

internal/models/language.go

@@ -0,0 +1,13 @@
+package models
+
+type Language struct {
+	Name       string
+	CompileCmd []string //source: src;result:executable
+	RunCmd     []string //source: executable
+}
+
+var Languages = [...]Language{
+	{Name: "gcc std=c90",
+		CompileCmd: []string{"gcc", "src", "-std=c90", "-o", "executable"},
+		RunCmd:     []string{"executable"}},
+}

internal/models/participant.go

@@ -0,0 +1,8 @@
+package models
+
+type Participant struct {
+	Id        *int32  `db:"id"`
+	UserId    *int32  `db:"user_id"`
+	ContestId *int32  `db:"contest_id"`
+	Name      *string `db:"name"`
+}

internal/models/problem.go

@@ -0,0 +1,15 @@
+package models
+
+import "time"
+
+type Problem struct {
+	Id              *int32     `db:"id"`
+	Title           *string    `db:"title"`
+	Content         *string    `db:"content"`
+	TimeLimit       *int32     `db:"time_limit"`
+	MemoryLimit     *int32     `db:"memory_limit"`
+	TestingStrategy *int32     `db:"testing_strategy"`
+	TestingOrder    *string    `db:"testing_order"`
+	CreatedAt       *time.Time `db:"created_at"`
+	UpdatedAt       *time.Time `db:"updated_at"`
+}

internal/models/result.go

@@ -0,0 +1,30 @@
+package models
+
+import (
+	"errors"
+)
+
+type Result int32
+
+const (
+	NotTested               Result = 1 // change only with schema change
+	Accepted                Result = 2
+	WrongAnswer             Result = 3
+	PresentationError       Result = 4
+	CompilationError        Result = 5
+	MemoryLimitExceeded     Result = 6
+	TimeLimitExceeded       Result = 7
+	RuntimeError            Result = 8
+	SystemFailDuringTesting Result = 9
+	Testing                 Result = 10
+)
+
+var ErrBadResult = errors.New("bad result")
+
+func (result Result) Valid() error {
+	switch result {
+	case NotTested, Accepted, TimeLimitExceeded, MemoryLimitExceeded, CompilationError, SystemFailDuringTesting:
+		return nil
+	}
+	return ErrBadResult
+}

internal/models/role.go

@@ -0,0 +1,52 @@
+package models
+
+import (
+	"errors"
+)
+
+type Role int32
+
+const (
+	RoleSpectator   Role = 0
+	RoleParticipant Role = 1
+	RoleModerator   Role = 2
+	RoleAdmin       Role = 3
+)
+
+func (role Role) IsAdmin() bool {
+	return role == RoleAdmin
+}
+
+func (role Role) IsModerator() bool {
+	return role == RoleModerator
+}
+
+func (role Role) IsParticipant() bool {
+	return role == RoleParticipant
+}
+
+func (role Role) IsSpectator() bool {
+	return role == RoleSpectator
+}
+
+func (role Role) AtLeast(other Role) bool {
+	return role >= other
+}
+
+func (role Role) AtMost(other Role) bool {
+	return role <= other
+}
+
+var ErrBadRole = errors.New("bad role")
+
+func (role Role) Valid() error {
+	switch role {
+	case RoleSpectator, RoleParticipant, RoleModerator, RoleAdmin:
+		return nil
+	}
+	return ErrBadRole
+}
+
+func (role Role) AsPointer() *Role {
+	return &role
+}

internal/models/solution.go

@@ -0,0 +1,14 @@
+package models
+
+import "time"
+
+type Solution struct {
+	Id            *int32     `db:"id"`
+	ParticipantId *int32     `db:"participant_id"`
+	TaskId        *int32     `db:"task_id"`
+	LanguageId    *int32     `db:"language_id"`
+	SolutionHash  *string    `db:"solution_hash"`
+	Result        *int32     `db:"result"`
+	Score         *int32     `db:"score"`
+	CreatedAt     *time.Time `db:"created_at"`
+}

internal/models/task.go

@@ -0,0 +1,9 @@
+package models
+
+type Task struct {
+	Id           *int32  `db:"id"`
+	ContestId    *int32  `db:"contest_id"`
+	ProblemId    *int32  `db:"problem_id"`
+	Position     *int32  `db:"position"`
+	PositionName *string `db:"position_name"`
+}

internal/models/user.go

@@ -0,0 +1,9 @@
+package models
+
+import "time"
+
+type User struct {
+	UserId    *int32     `json:"user_id" db:"user_id"`
+	Role      *Role      `json:"role" db:"role"`
+	UpdatedAt *time.Time `json:"updated_at" db:"updated_at"`
+}