palourde/uchiwa

package daemon

import (
    "fmt"
    "sync"

    "github.com/mitchellh/mapstructure"
    "github.com/sensu/uchiwa/uchiwa/helpers"
    "github.com/sensu/uchiwa/uchiwa/logger"
    "github.com/sensu/uchiwa/uchiwa/structs"
)

// buildClients constructs clients objects for frontend consumption
func (d *Daemon) buildClients() {
    wg := &sync.WaitGroup{}

    for _, c := range d.Data.Clients {
        wg.Add(1)

        go d.buildClient(c, wg)
    }

    wg.Wait()
}

func (d *Daemon) buildClient(c interface{}, wg *sync.WaitGroup) {
    defer wg.Done()

    client, ok := c.(map[string]interface{})
    if !ok {
        return
    }

    dc, ok := client["dc"].(string)
    if !ok {
        return
    }

    name, ok := client["name"].(string)
    if !ok {
        return
    }

    client["_id"] = fmt.Sprintf("%s/%s", dc, name)
    client = findClientEvents(client, &d.Data.Events)
    client["silenced"] = helpers.IsClientSilenced(name, dc, d.Data.Silenced)
}

// findClientEvents searches for all events related to a particular client
// and set the status and output attributes of this client based on the events found
func findClientEvents(client map[string]interface{}, events *[]interface{}) map[string]interface{} {
    if len(*events) == 0 {
        client["status"] = 0
    } else {
        var criticals, warnings int
        var results []string
        for _, e := range *events {

            eventMap, ok := e.(map[string]interface{})
            if !ok {
                logger.Warningf("Could not convert the event to a map: %+v", eventMap)
                continue
            }

            // skip this event if the check attribute does not exist
            if eventMap["check"] == nil {
                continue
            }

            // skip this event if the datacenter isn't the right one
            if eventMap["dc"] == nil || eventMap["dc"] != client["dc"] {
                continue
            }

            clientMap, ok := eventMap["client"].(map[string]interface{})
            if !ok {
                logger.Warningf("Could not convert the event's client to a map: %+v", eventMap)
                continue
            }

            // skip this event if the client isn't the right one
            if clientMap["name"] == nil || clientMap["name"] != client["name"] {
                continue
            }

            // convert the check to a structure for easier handling
            var check structs.GenericCheck
            err := mapstructure.Decode(eventMap["check"], &check)
            if err != nil {
                logger.Warningf("Could not convert the event's check to a generic check structure: %s", err)
                continue
            }

            if check.Status == 2 {
                criticals++
            } else if check.Status == 1 {
                warnings++
            }

            results = append(results, check.Output)
        }

        if len(results) == 0 {
            client["status"] = 0
        } else if criticals > 0 {
            client["status"] = 2
        } else if warnings > 0 {
            client["status"] = 1
        } else {
            client["status"] = 3
        }

        if len(results) == 1 {
            client["output"] = results[0]
        } else if len(results) > 1 {
            output := fmt.Sprintf("%s and %d more...", results[0], (len(results) - 1))
            client["output"] = output
        }
    }

    return client
}