first commit: one-api base code + SAAS plan document

model/ability.go

@@ -0,0 +1,112 @@
+package model
+
+import (
+	"context"
+	"sort"
+	"strings"
+
+	"gorm.io/gorm"
+
+	"github.com/songquanpeng/one-api/common"
+	"github.com/songquanpeng/one-api/common/utils"
+)
+
+type Ability struct {
+	Group     string `json:"group" gorm:"type:varchar(32);primaryKey;autoIncrement:false"`
+	Model     string `json:"model" gorm:"primaryKey;autoIncrement:false"`
+	ChannelId int    `json:"channel_id" gorm:"primaryKey;autoIncrement:false;index"`
+	Enabled   bool   `json:"enabled"`
+	Priority  *int64 `json:"priority" gorm:"bigint;default:0;index"`
+}
+
+func GetRandomSatisfiedChannel(group string, model string, ignoreFirstPriority bool) (*Channel, error) {
+	ability := Ability{}
+	groupCol := "`group`"
+	trueVal := "1"
+	if common.UsingPostgreSQL {
+		groupCol = `"group"`
+		trueVal = "true"
+	}
+
+	var err error = nil
+	var channelQuery *gorm.DB
+	if ignoreFirstPriority {
+		channelQuery = DB.Where(groupCol+" = ? and model = ? and enabled = "+trueVal, group, model)
+	} else {
+		maxPrioritySubQuery := DB.Model(&Ability{}).Select("MAX(priority)").Where(groupCol+" = ? and model = ? and enabled = "+trueVal, group, model)
+		channelQuery = DB.Where(groupCol+" = ? and model = ? and enabled = "+trueVal+" and priority = (?)", group, model, maxPrioritySubQuery)
+	}
+	if common.UsingSQLite || common.UsingPostgreSQL {
+		err = channelQuery.Order("RANDOM()").First(&ability).Error
+	} else {
+		err = channelQuery.Order("RAND()").First(&ability).Error
+	}
+	if err != nil {
+		return nil, err
+	}
+	channel := Channel{}
+	channel.Id = ability.ChannelId
+	err = DB.First(&channel, "id = ?", ability.ChannelId).Error
+	return &channel, err
+}
+
+func (channel *Channel) AddAbilities() error {
+	models_ := strings.Split(channel.Models, ",")
+	models_ = utils.DeDuplication(models_)
+	groups_ := strings.Split(channel.Group, ",")
+	abilities := make([]Ability, 0, len(models_))
+	for _, model := range models_ {
+		for _, group := range groups_ {
+			ability := Ability{
+				Group:     group,
+				Model:     model,
+				ChannelId: channel.Id,
+				Enabled:   channel.Status == ChannelStatusEnabled,
+				Priority:  channel.Priority,
+			}
+			abilities = append(abilities, ability)
+		}
+	}
+	return DB.Create(&abilities).Error
+}
+
+func (channel *Channel) DeleteAbilities() error {
+	return DB.Where("channel_id = ?", channel.Id).Delete(&Ability{}).Error
+}
+
+// UpdateAbilities updates abilities of this channel.
+// Make sure the channel is completed before calling this function.
+func (channel *Channel) UpdateAbilities() error {
+	// A quick and dirty way to update abilities
+	// First delete all abilities of this channel
+	err := channel.DeleteAbilities()
+	if err != nil {
+		return err
+	}
+	// Then add new abilities
+	err = channel.AddAbilities()
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+func UpdateAbilityStatus(channelId int, status bool) error {
+	return DB.Model(&Ability{}).Where("channel_id = ?", channelId).Select("enabled").Update("enabled", status).Error
+}
+
+func GetGroupModels(ctx context.Context, group string) ([]string, error) {
+	groupCol := "`group`"
+	trueVal := "1"
+	if common.UsingPostgreSQL {
+		groupCol = `"group"`
+		trueVal = "true"
+	}
+	var models []string
+	err := DB.Model(&Ability{}).Distinct("model").Where(groupCol+" = ? and enabled = "+trueVal, group).Pluck("model", &models).Error
+	if err != nil {
+		return nil, err
+	}
+	sort.Strings(models)
+	return models, err
+}