Add initial support for fetching egg configuration from panel for servers

api/server_endpoints.go

@@ -0,0 +1,89 @@
+package api
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"github.com/buger/jsonparser"
+	"go.uber.org/zap"
+)
+
+// Defines a single find/replace instance for a given server configuration file.
+type ConfigurationFileReplacement struct {
+	Match string `json:"match"`
+	Value string `json:"value"`
+	ValueType jsonparser.ValueType `json:"-"`
+}
+
+func (cfr *ConfigurationFileReplacement) UnmarshalJSON(data []byte) error {
+	if m, err := jsonparser.GetString(data, "match"); err != nil {
+		return err
+	} else {
+		cfr.Match = m
+	}
+
+	if v, dt, _, err := jsonparser.Get(data, "value"); err != nil {
+		return err
+	} else {
+		if dt != jsonparser.String && dt != jsonparser.Number && dt != jsonparser.Boolean {
+			return errors.New(
+				fmt.Sprintf("cannot parse JSON: received unexpected replacement value type: %d", dt),
+			)
+		}
+
+		cfr.Value = string(v)
+		cfr.ValueType = dt
+	}
+
+	return nil
+}
+
+// Defines a configuration file for the server startup. These will be looped over
+// and modified before the server finishes booting.
+type ConfigurationFile struct {
+	FileName string                         `json:"file"`
+	Parser   string                         `json:"parser"`
+	Replace  []ConfigurationFileReplacement `json:"replace"`
+}
+
+// Defines the process configuration for a given server instance. This sets what the
+// daemon is looking for to mark a server as done starting, what to do when stopping,
+// and what changes to make to the configuration file for a server.
+type ServerConfiguration struct {
+	Startup struct {
+		Done            string   `json:"done"`
+		UserInteraction []string `json:"userInteraction"`
+	} `json:"startup"`
+	Stop struct {
+		Type  string `json:"type"`
+		Value string `json:"value"`
+	} `json:"stop"`
+	ConfigurationFiles []ConfigurationFile `json:"configs"`
+}
+
+// Fetches the server configuration and returns the struct for it.
+func (r *PanelRequest) GetServerConfiguration(uuid string) (*ServerConfiguration, error) {
+	resp, err := r.Get(fmt.Sprintf("/servers/%s/configuration", uuid))
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	r.Response = resp
+
+	if r.HasError() {
+		e, err := r.Error()
+		zap.S().Warnw("got error", zap.String("message", e), zap.Error(err))
+
+		return nil, err
+	}
+
+	res := &ServerConfiguration{}
+	b, _ := r.ReadBody()
+
+	if err := json.Unmarshal(b, res); err != nil {
+		return nil, err
+	}
+
+	return res, nil
+}