package gonextcloud

import (
        req "github.com/levigross/grequests"
        "github.com/partitio/gonextcloud/types"
)

func (c *Client) AppList() ([]string, error) {
        if !c.loggedIn() {
                return nil, unauthorized
        }
        u := c.baseURL.ResolveReference(routes.apps)
        res, err := c.session.Get(u.String(), nil)
        if err != nil {
                return nil, err
        }
        var r types.AppListResponse
        res.JSON(&r)
        return r.Ocs.Data.Apps, nil
        return nil, nil
}

func (c *Client) appsBaseRequest(name string, route string, ro *req.RequestOptions, method string) error {
        res, err := c.baseRequest(routes.apps, name, route, ro, method)
        if err != nil {
                return err
        }
        var r types.UserResponse
        res.JSON(&r)
        if r.Ocs.Meta.Statuscode != 100 {
                e := types.ErrorFromMeta(r.Ocs.Meta)
                return &e
        }
        return nil
}

package gonextcloud

import (
        "fmt"
        req "github.com/levigross/grequests"
        "github.com/partitio/gonextcloud/types"
)

var unauthorized = fmt.Errorf("login first")

func (c *Client) Login(username string, password string) error {
        c.username = username
        c.password = password
        options := req.RequestOptions{
                Headers: c.headers,
                Auth:    []string{c.username, c.password},
        }
        c.session = req.NewSession(&options)
        // TODO What to do with capabilities ? (other thant connection validation)
        u := c.baseURL.ResolveReference(routes.capabilities)
        res, err := c.session.Get(u.String(), nil)
        if err != nil {
                return err
        }
        var r types.CapabilitiesResponse
        res.JSON(&r)
        // No need to check for Ocs.Meta.StatusCode as capabilities are always returned
        c.capabilities = &r.Ocs.Data.Capabilities
        // Check if authentication failed
        if !c.loggedIn() {
                e := types.APIError{Message: "authentication failed"}
                return &e
        }
        return nil
}

func (c *Client) Logout() error {
        c.session.CloseIdleConnections()
        c.session.HTTPClient.Jar = nil
        // Clear capabilities as it is used to check for valid authentication
        c.capabilities = nil
        return nil
}

func (c *Client) loggedIn() bool {
        // When authentication failed, capabilities doesn't contains core information
        if c.capabilities == nil {
                return false
        }
        return c.capabilities.Core.WebdavRoot != ""
}

/*
Package client is a Go client for the Nextcloud Provisioning API.

For more information about the Provisioning API, see the documentation:
https://docs.nextcloud.com/server/13/admin_manual/configuration_user/user_provisioning_api.html

Usage

You use the library by creating a client object and calling methods on it.

For example, to list all the Nextcloud's instance users:

        package main

        import (
                "fmt"
                "github.com/partitio/gonextcloud/client"
        )

        func main() {
                url := "https://www.mynextcloud.com"
                username := "admin"
                password := "password"
                c, err := client.NewClient(url)
                if err != nil {
                        panic(err)
                }
                if err := c.Login(username, password); err != nil {
                        panic(err)
                }
                defer c.Logout()

                users, err := c.UserList()
                if err != nil {
                        panic(err)
                }
                fmt.Println("Users :", users)
        }
*/

package gonextcloud

import (
        req "github.com/levigross/grequests"
        "github.com/partitio/gonextcloud/types"
        "net/url"
)

type Client struct {
        baseURL      *url.URL
        username     string
        password     string
        session      *req.Session
        headers      map[string]string
        capabilities *types.Capabilities
}

func NewClient(hostname string) (*Client, error) {
        baseURL, err := url.ParseRequestURI(hostname)
        if err != nil {
                baseURL, err = url.ParseRequestURI("https://" + hostname)
                if err != nil {
                        return nil, err
                }
        }

        c := Client{
                baseURL: baseURL,
                headers: map[string]string{
                        "OCS-APIREQUEST": "true",
                        "Accept":         "application/json",
                },
        }
        return &c, nil
}

package gonextcloud

import (
        req "github.com/levigross/grequests"
        "github.com/partitio/gonextcloud/types"
        "net/http"
)

func (c *Client) GroupList() ([]string, error) {
        res, err := c.baseRequest(routes.groups, "", "", nil, http.MethodGet)
        if err != nil {
                return nil, err
        }
        var r types.GroupListResponse
        res.JSON(&r)
        return r.Ocs.Data.Groups, nil
}

func (c *Client) GroupUsers(name string) ([]string, error) {
        res, err := c.baseRequest(routes.groups, name, "", nil, http.MethodGet)
        if err != nil {
                return nil, err
        }
        var r types.UserListResponse
        res.JSON(&r)
        return r.Ocs.Data.Users, nil
}

func (c *Client) GroupSearch(search string) ([]string, error) {
        ro := &req.RequestOptions{
                Params: map[string]string{"search": search},
        }
        res, err := c.baseRequest(routes.groups, "", "", ro, http.MethodGet)
        if err != nil {
                return nil, err
        }
        var r types.GroupListResponse
        res.JSON(&r)
        return r.Ocs.Data.Groups, nil
}

func (c *Client) GroupCreate(name string) error {
        ro := &req.RequestOptions{
                Data: map[string]string{
                        "groupid": name,
                },
        }
        if err := c.groupBaseRequest("", "", ro, http.MethodPost); err != nil {
                return err
        }
        return nil
}

func (c *Client) GroupDelete(name string) error {
        if err := c.groupBaseRequest(name, "", nil, http.MethodDelete); err != nil {
                return err
        }
        return nil
}

func (c *Client) GroupSubAdminList(name string) ([]string, error) {
        res, err := c.baseRequest(routes.groups, name, "subadmins", nil, http.MethodGet)
        if err != nil {
                return nil, err
        }
        var r types.UserListResponse
        res.JSON(&r)
        return r.Ocs.Data.Users, nil
}

func (c *Client) groupBaseRequest(name string, route string, ro *req.RequestOptions, method string) error {
        res, err := c.baseRequest(routes.groups, name, route, ro, method)
        if err != nil {
                return err
        }
        var r types.GroupListResponse
        res.JSON(&r)
        return nil
}

package gonextcloud

import (
        "encoding/json"
        req "github.com/levigross/grequests"
        "github.com/partitio/gonextcloud/types"
        "net/http"
        "path"
        "strconv"
)

func (c *Client) UserList() ([]string, error) {
        if !c.loggedIn() {
                return nil, unauthorized
        }
        u := c.baseURL.ResolveReference(routes.users)
        res, err := c.session.Get(u.String(), nil)
        if err != nil {
                return nil, err
        }
        var r types.UserListResponse
        res.JSON(&r)
        return r.Ocs.Data.Users, nil
}

func (c *Client) User(name string) (*types.User, error) {
        if name == "" {
                return nil, &types.APIError{Message: "name cannot be empty"}
        }
        if !c.loggedIn() {
                return nil, unauthorized
        }
        u := c.baseURL.ResolveReference(routes.users)
        u.Path = path.Join(u.Path, name)
        res, err := c.session.Get(u.String(), nil)
        if err != nil {
                return nil, err
        }
        var r types.UserResponse
        js := res.String()
        // Nextcloud does not encode JSON properly
        js = reformatJSON(js)
        if err := json.Unmarshal([]byte(js), &r); err != nil {
                return nil, err
        }
        if r.Ocs.Meta.Statuscode != 100 {
                e := types.ErrorFromMeta(r.Ocs.Meta)
                return nil, &e
        }
        return &r.Ocs.Data, nil
}

func (c *Client) UserSearch(search string) ([]string, error) {
        if !c.loggedIn() {
                return nil, unauthorized
        }
        u := c.baseURL.ResolveReference(routes.users)
        ro := &req.RequestOptions{
                Params: map[string]string{"search": search},
        }
        res, err := c.session.Get(u.String(), ro)
        if err != nil {
                return nil, err
        }
        var r types.UserListResponse
        res.JSON(&r)
        if r.Ocs.Meta.Statuscode != 100 {
                e := types.ErrorFromMeta(r.Ocs.Meta)
                return nil, &e
        }
        return r.Ocs.Data.Users, nil
}

func (c *Client) UserCreate(username string, password string) error {
        ro := &req.RequestOptions{
                Data: map[string]string{
                        "userid":   username,
                        "password": password,
                },
        }
        return c.userBaseRequest("", "", ro, http.MethodPost)
}

func (c *Client) UserDelete(name string) error {
        return c.userBaseRequest(name, "", nil, http.MethodDelete)
}

func (c *Client) UserEnable(name string) error {
        ro := &req.RequestOptions{
                Data: map[string]string{},
        }
        return c.userBaseRequest(name, "enable", ro, http.MethodPut)
}

func (c *Client) UserDisable(name string) error {
        ro := &req.RequestOptions{
                Data: map[string]string{},
        }
        return c.userBaseRequest(name, "disable", ro, http.MethodPut)
}

func (c *Client) UserSendWelcomeEmail(name string) error {
        return c.userBaseRequest(name, "welcome", nil, http.MethodPost)
}

func (c *Client) UserUpdateEmail(name string, email string) error {
        return c.userUpdateAttribute(name, "email", email)
}

func (c *Client) UserUpdateDisplayName(name string, displayName string) error {
        return c.userUpdateAttribute(name, "displayname", displayName)
}

func (c *Client) UserUpdatePhone(name string, phone string) error {
        return c.userUpdateAttribute(name, "phone", phone)
}

func (c *Client) UserUpdateAddress(name string, address string) error {
        return c.userUpdateAttribute(name, "address", address)
}

func (c *Client) UserUpdateWebSite(name string, website string) error {
        return c.userUpdateAttribute(name, "website", website)
}

func (c *Client) UserUpdateTwitter(name string, twitter string) error {
        return c.userUpdateAttribute(name, "twitter", twitter)
}

func (c *Client) UserUpdatePassword(name string, password string) error {
        return c.userUpdateAttribute(name, "password", password)
}

func (c *Client) UserUpdateQuota(name string, quota int) error {
        return c.userUpdateAttribute(name, "quota", strconv.Itoa(quota))
}

func (c *Client) UserGroupList(name string) ([]string, error) {
        if !c.loggedIn() {
                return nil, unauthorized
        }
        u := c.baseURL.ResolveReference(routes.users)
        u.Path = path.Join(u.Path, name, "groups")
        res, err := c.session.Get(u.String(), nil)
        if err != nil {
                return nil, err
        }
        var r types.GroupListResponse
        res.JSON(&r)
        if r.Ocs.Meta.Statuscode != 100 {
                e := types.ErrorFromMeta(r.Ocs.Meta)
                return nil, &e
        }
        return r.Ocs.Data.Groups, nil
}

func (c *Client) UserGroupAdd(name string, group string) error {
        ro := &req.RequestOptions{
                Data: map[string]string{
                        "groupid": group,
                },
        }
        return c.userBaseRequest(name, "groups", ro, http.MethodPost)
}

func (c *Client) UserGroupRemove(name string, group string) error {
        ro := &req.RequestOptions{
                Data: map[string]string{
                        "groupid": group,
                },
        }
        return c.userBaseRequest(name, "groups", ro, http.MethodDelete)
}

func (c *Client) UserGroupPromote(name string, group string) error {
        ro := &req.RequestOptions{
                Data: map[string]string{
                        "groupid": group,
                },
        }
        return c.userBaseRequest(name, "subadmins", ro, http.MethodPost)
}

func (c *Client) UserGroupDemote(name string, group string) error {
        ro := &req.RequestOptions{
                Data: map[string]string{
                        "groupid": group,
                },
        }
        return c.userBaseRequest(name, "subadmins", ro, http.MethodDelete)
}

func (c *Client) UserGroupSubAdminList(name string) ([]string, error) {
        if !c.loggedIn() {
                return nil, unauthorized
        }
        u := c.baseURL.ResolveReference(routes.users)
        u.Path = path.Join(u.Path, name, "subadmins")
        res, err := c.session.Get(u.String(), nil)
        if err != nil {
                return nil, err
        }
        var r types.BaseResponse
        res.JSON(&r)
        if r.Ocs.Meta.Statuscode != 100 {
                e := types.ErrorFromMeta(r.Ocs.Meta)
                return nil, &e
        }
        return r.Ocs.Data, nil
}

func (c *Client) userUpdateAttribute(name string, key string, value string) error {
        ro := &req.RequestOptions{
                Data: map[string]string{
                        "key":   key,
                        "value": value,
                },
        }
        return c.userBaseRequest(name, "", ro, http.MethodPut)
}

func (c *Client) userBaseRequest(name string, route string, ro *req.RequestOptions, method string) error {
        res, err := c.baseRequest(routes.users, name, route, ro, method)
        if err != nil {
                return err
        }
        var r types.UserResponse
        res.JSON(&r)
        if r.Ocs.Meta.Statuscode != 100 {
                e := types.ErrorFromMeta(r.Ocs.Meta)
                return &e
        }
        return nil
}

package gonextcloud

import (
        "encoding/json"
        req "github.com/levigross/grequests"
        "github.com/partitio/gonextcloud/types"
        "net/http"
        "net/url"
        "path"
        "strings"
)

func (c *Client) baseRequest(route *url.URL, name string, subroute string, ro *req.RequestOptions, method string) (*req.Response, error) {
        if !c.loggedIn() {
                return nil, unauthorized
        }
        u := c.baseURL.ResolveReference(route)
        if name != "" {
                u.Path = path.Join(u.Path, name)
        }
        if subroute != "" {
                u.Path = path.Join(u.Path, subroute)
        }
        var (
                res *req.Response
                err error
        )
        if method == http.MethodGet {
                res, err = c.session.Get(u.String(), ro)
        } else if method == http.MethodPost {
                res, err = c.session.Post(u.String(), ro)
        } else if method == http.MethodPut {
                res, err = c.session.Put(u.String(), ro)
        } else if method == http.MethodDelete {
                res, err = c.session.Delete(u.String(), ro)
        }
        if err != nil {
                return nil, err
        }
        // As we cannot read the ReaderCloser twice, we use the string content
        js := res.String()
        var r types.BaseResponse
        json.Unmarshal([]byte(js), &r)
        if r.Ocs.Meta.Statuscode != 100 {
                err := types.ErrorFromMeta(r.Ocs.Meta)
                return nil, &err
        }
        return res, nil
}

func reformatJSON(json string) string {
        // Nextcloud encode boolean as string
        json = strings.Replace(json, "\"true\"", "true", -1)
        json = strings.Replace(json, "\"false\"", "false", -1)
        // Nextcloud encode quota as an empty array for never connected users
        json = strings.Replace(json, "\"quota\":[],", "", -1)
        return json
}