Add script resource (#173)

* Implement script resource

* Generate docs for script resource

* Update CHANGELOG

* Fixed reviewed ones

* Fix test

* Fix subcategory for elasticstack_elasticsearch_script

* Fix elasticstack_elasticsearch_script docs

* Format code

* Regenerate docs

* Remove new resource check

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ### Added
 - New resource `elasticstack_elasticsearch_logstash_pipeline` to manage Logstash pipelines ([Centralized Pipeline Management](https://www.elastic.co/guide/en/logstash/current/logstash-centralized-pipeline-management.html)) ([#151](https://github.com/elastic/terraform-provider-elasticstack/pull/151))
+- Add `elasticstack_elasticsearch_script` resource ([#173](https://github.com/elastic/terraform-provider-elasticstack/pull/173))
 - Add `elasticstack_elasticsearch_security_role` data source ([#177](https://github.com/elastic/terraform-provider-elasticstack/pull/177))
 - Add `elasticstack_elasticsearch_security_role_mapping` data source ([#178](https://github.com/elastic/terraform-provider-elasticstack/pull/178))
 

docs/resources/elasticsearch_script.md

@@ -0,0 +1,83 @@
+---
+subcategory: "Cluster"
+layout: ""
+page_title: "Elasticstack: elasticstack_elasticsearch_script Resource"
+description: |-
+  Creates or updates a stored script or search template.
+---
+
+# Resource: elasticstack_elasticsearch_script
+
+Creates or updates a stored script or search template. See https://www.elastic.co/guide/en/elasticsearch/reference/current/create-stored-script-api.html
+
+## Example Usage
+
+```terraform
+provider "elasticstack" {
+  elasticsearch {}
+}
+
+resource "elasticstack_elasticsearch_script" "my_script" {
+  script_id = "my_script"
+  lang      = "painless"
+  source    = "Math.log(_score * 2) + params['my_modifier']"
+  context   = "score"
+}
+
+resource "elasticstack_elasticsearch_script" "my_search_template" {
+  script_id = "my_search_template"
+  lang      = "mustache"
+  source = jsonencode({
+    query = {
+      match = {
+        message = "{{query_string}}"
+      }
+    }
+    from = "{{from}}"
+    size = "{{size}}"
+  })
+  params = jsonencode({
+    query_string = "My query string"
+  })
+}
+```
+
+<!-- schema generated by tfplugindocs -->
+## Schema
+
+### Required
+
+- `lang` (String) Script language. For search templates, use `mustache`.
+- `script_id` (String) Identifier for the stored script. Must be unique within the cluster.
+- `source` (String) For scripts, a string containing the script. For search templates, an object containing the search template.
+
+### Optional
+
+- `context` (String) Context in which the script or search template should run.
+- `elasticsearch_connection` (Block List, Max: 1) Used to establish connection to Elasticsearch server. Overrides environment variables if present. (see [below for nested schema](#nestedblock--elasticsearch_connection))
+- `params` (String) Parameters for the script or search template.
+
+### Read-Only
+
+- `id` (String) The ID of this resource.
+
+<a id="nestedblock--elasticsearch_connection"></a>
+### Nested Schema for `elasticsearch_connection`
+
+Optional:
+
+- `api_key` (String, Sensitive) API Key to use for authentication to Elasticsearch
+- `ca_data` (String) PEM-encoded custom Certificate Authority certificate
+- `ca_file` (String) Path to a custom Certificate Authority certificate
+- `endpoints` (List of String, Sensitive) A list of endpoints the Terraform provider will point to. They must include the http(s) schema and port number.
+- `insecure` (Boolean) Disable TLS certificate validation
+- `password` (String, Sensitive) A password to use for API authentication to Elasticsearch.
+- `username` (String) A username to use for API authentication to Elasticsearch.
+
+## Import
+
+Import is supported using the following syntax:
+
+```shell
+terraform import elasticstack_elasticsearch_script.my_script <cluster_uuid>/<script id>
+```

examples/resources/elasticstack_elasticsearch_script/import.sh

@@ -0,0 +1 @@
+terraform import elasticstack_elasticsearch_script.my_script <cluster_uuid>/<script id>

examples/resources/elasticstack_elasticsearch_script/resource.tf

@@ -0,0 +1,27 @@
+provider "elasticstack" {
+  elasticsearch {}
+}
+
+resource "elasticstack_elasticsearch_script" "my_script" {
+  script_id = "my_script"
+  lang      = "painless"
+  source    = "Math.log(_score * 2) + params['my_modifier']"
+  context   = "score"
+}
+
+resource "elasticstack_elasticsearch_script" "my_search_template" {
+  script_id = "my_search_template"
+  lang      = "mustache"
+  source = jsonencode({
+    query = {
+      match = {
+        message = "{{query_string}}"
+      }
+    }
+    from = "{{from}}"
+    size = "{{size}}"
+  })
+  params = jsonencode({
+    query_string = "My query string"
+  })
+}

internal/clients/cluster.go

@@ -175,3 +175,58 @@ func (a *ApiClient) GetElasticsearchSettings(ctx context.Context) (map[string]in
 	}
 	return clusterSettings, diags
 }
+
+func (a *ApiClient) GetElasticsearchScript(ctx context.Context, id string) (*models.Script, diag.Diagnostics) {
+	res, err := a.es.GetScript(id, a.es.GetScript.WithContext(ctx))
+	if err != nil {
+		return nil, diag.FromErr(err)
+	}
+	defer res.Body.Close()
+	if res.StatusCode == http.StatusNotFound {
+		return nil, nil
+	}
+	if diags := utils.CheckError(res, fmt.Sprintf("Unable to get stored script: %s", id)); diags.HasError() {
+		return nil, diags
+	}
+	var scriptResponse struct {
+		Script *models.Script `json:"script"`
+	}
+	if err := json.NewDecoder(res.Body).Decode(&scriptResponse); err != nil {
+		return nil, diag.FromErr(err)
+	}
+
+	return scriptResponse.Script, nil
+}
+
+func (a *ApiClient) PutElasticsearchScript(ctx context.Context, script *models.Script) diag.Diagnostics {
+	req := struct {
+		Script *models.Script `json:"script"`
+	}{
+		script,
+	}
+	scriptBytes, err := json.Marshal(req)
+	if err != nil {
+		return diag.FromErr(err)
+	}
+	res, err := a.es.PutScript(script.ID, bytes.NewReader(scriptBytes), a.es.PutScript.WithContext(ctx), a.es.PutScript.WithScriptContext(script.Context))
+	if err != nil {
+		return diag.FromErr(err)
+	}
+	defer res.Body.Close()
+	if diags := utils.CheckError(res, "Unable to put stored script"); diags.HasError() {
+		return diags
+	}
+	return nil
+}
+
+func (a *ApiClient) DeleteElasticsearchScript(ctx context.Context, id string) diag.Diagnostics {
+	res, err := a.es.DeleteScript(id, a.es.DeleteScript.WithContext(ctx))
+	if err != nil {
+		return diag.FromErr(err)
+	}
+	defer res.Body.Close()
+	if diags := utils.CheckError(res, fmt.Sprintf("Unable to delete script: %s", id)); diags.HasError() {
+		return diags
+	}
+	return nil
+}

internal/elasticsearch/cluster/script.go

@@ -0,0 +1,150 @@
+package cluster
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	"github.com/elastic/terraform-provider-elasticstack/internal/clients"
+	"github.com/elastic/terraform-provider-elasticstack/internal/models"
+	"github.com/elastic/terraform-provider-elasticstack/internal/utils"
+	"github.com/hashicorp/terraform-plugin-log/tflog"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/validation"
+)
+
+func ResourceScript() *schema.Resource {
+	scriptSchema := map[string]*schema.Schema{
+		"script_id": {
+			Description: "Identifier for the stored script. Must be unique within the cluster.",
+			Type:        schema.TypeString,
+			Required:    true,
+			ForceNew:    true,
+		},
+		"lang": {
+			Description:  "Script language. For search templates, use `mustache`.",
+			Type:         schema.TypeString,
+			Required:     true,
+			ValidateFunc: validation.StringInSlice([]string{"painless", "expression", "mustache", "java"}, false),
+		},
+		"source": {
+			Description: "For scripts, a string containing the script. For search templates, an object containing the search template.",
+			Type:        schema.TypeString,
+			Required:    true,
+		},
+		"params": {
+			Description:      "Parameters for the script or search template.",
+			Type:             schema.TypeString,
+			Optional:         true,
+			DiffSuppressFunc: utils.DiffJsonSuppress,
+			ValidateFunc:     validation.StringIsJSON,
+		},
+		"context": {
+			Description: "Context in which the script or search template should run.",
+			Type:        schema.TypeString,
+			Optional:    true,
+		},
+	}
+	utils.AddConnectionSchema(scriptSchema)
+
+	return &schema.Resource{
+		Description: "Creates or updates a stored script or search template. See https://www.elastic.co/guide/en/elasticsearch/reference/current/create-stored-script-api.html",
+
+		CreateContext: resourceScriptPut,
+		UpdateContext: resourceScriptPut,
+		ReadContext:   resourceScriptRead,
+		DeleteContext: resourceScriptDelete,
+
+		Importer: &schema.ResourceImporter{
+			StateContext: schema.ImportStatePassthroughContext,
+		},
+
+		Schema: scriptSchema,
+	}
+}
+
+func resourceScriptRead(ctx context.Context, d *schema.ResourceData, meta interface{}) diag.Diagnostics {
+	var diags diag.Diagnostics
+	client, err := clients.NewApiClient(d, meta)
+	if err != nil {
+		return diag.FromErr(err)
+	}
+
+	id := d.Id()
+	compId, diags := clients.CompositeIdFromStr(id)
+	if diags.HasError() {
+		return diags
+	}
+
+	script, diags := client.GetElasticsearchScript(ctx, compId.ResourceId)
+	if script == nil && diags == nil {
+		tflog.Warn(ctx, fmt.Sprintf(`Script "%s" not found, removing from state`, compId.ResourceId))
+		d.SetId("")
+	}
+	if diags.HasError() {
+		return diags
+	}
+
+	if err := d.Set("script_id", compId.ResourceId); err != nil {
+		return diag.FromErr(err)
+	}
+	if err := d.Set("lang", script.Language); err != nil {
+		return diag.FromErr(err)
+	}
+	if err := d.Set("source", script.Source); err != nil {
+		return diag.FromErr(err)
+	}
+
+	return diags
+}
+
+func resourceScriptPut(ctx context.Context, d *schema.ResourceData, meta interface{}) diag.Diagnostics {
+	client, err := clients.NewApiClient(d, meta)
+	if err != nil {
+		return diag.FromErr(err)
+	}
+
+	scriptID := d.Get("script_id").(string)
+	id, diags := client.ID(ctx, scriptID)
+	if diags.HasError() {
+		return diags
+	}
+
+	script := models.Script{
+		ID:       scriptID,
+		Language: d.Get("lang").(string),
+		Source:   d.Get("source").(string),
+	}
+	if paramsJSON, ok := d.GetOk("params"); ok {
+		var params map[string]interface{}
+		bytes := []byte(paramsJSON.(string))
+		err = json.Unmarshal(bytes, &params)
+		if err != nil {
+			return diag.FromErr(err)
+		}
+		script.Params = params
+	}
+	if scriptContext, ok := d.GetOk("context"); ok {
+		script.Context = scriptContext.(string)
+	}
+	if diags := client.PutElasticsearchScript(ctx, &script); diags.HasError() {
+		return diags
+	}
+
+	d.SetId(id.String())
+	return resourceScriptRead(ctx, d, meta)
+}
+
+func resourceScriptDelete(ctx context.Context, d *schema.ResourceData, meta interface{}) diag.Diagnostics {
+	client, err := clients.NewApiClient(d, meta)
+	if err != nil {
+		return diag.FromErr(err)
+	}
+
+	compId, diags := clients.CompositeIdFromStr(d.Id())
+	if diags.HasError() {
+		return diags
+	}
+	return client.DeleteElasticsearchScript(ctx, compId.ResourceId)
+}