make sure we can send limit and offset when querying.

list the diagnostic reports in the dropdown for filtering.

.gitignore

@@ -8,6 +8,7 @@
 .idea/**/tasks.xml
 .idea/**/dictionaries
 .idea/**/shelf
+.idea/dataSources.xml
 
 # Sensitive or high-churn files
 .idea/**/dataSources/

backend/pkg/database/sqlite_repository_query.go

@@ -34,19 +34,20 @@ const (
 
 const TABLE_ALIAS = "fhir"
 
-//Allows users to use SearchParameters to query resources
+// Allows users to use SearchParameters to query resources
 // Can generate simple or complex queries, depending on the SearchParameter type:
 //
 // eg. Simple
 //
-//
 // eg. Complex
 // SELECT fhir.*
 // FROM fhir_observation as fhir, json_each(fhir.code) as codeJson
 // WHERE (
+//
 //	(codeJson.value ->> '$.code' = "29463-7" AND codeJson.value ->> '$.system' = "http://loinc.org")
 //	OR (codeJson.value ->> '$.code' = "3141-9" AND codeJson.value ->> '$.system' = "http://loinc.org")
 //	OR (codeJson.value ->> '$.code' = "27113001" AND codeJson.value ->> '$.system' = "http://snomed.info/sct")
+//
 // )
 // AND (user_id = "6efcd7c5-3f29-4f0d-926d-a66ff68bbfc2")
 // GROUP BY `fhir`.`id`
@@ -142,7 +143,7 @@ func (sr *SqliteRepository) sqlQueryResources(ctx context.Context, query models.
 	//defaults
 	selectClauses := []string{fmt.Sprintf("%s.*", TABLE_ALIAS)}
 	groupClause := fmt.Sprintf("%s.id", TABLE_ALIAS)
-	orderClause := fmt.Sprintf("%s.sort_date ASC", TABLE_ALIAS)
+	orderClause := fmt.Sprintf("%s.sort_date DESC", TABLE_ALIAS)
 	if query.Aggregations != nil {
 
 		//Handle Aggregations
@@ -210,12 +211,21 @@ func (sr *SqliteRepository) sqlQueryResources(ctx context.Context, query models.
 	fromClauses = lo.Uniq(fromClauses)
 	fromClauses = lo.Compact(fromClauses)
 
-	return sr.GormClient.WithContext(ctx).
+	fluentQuery := sr.GormClient.WithContext(ctx).
 		Select(strings.Join(selectClauses, ", ")).
 		Where(strings.Join(whereClauses, " AND "), whereNamedParameters).
 		Group(groupClause).
-		Order(orderClause).
-		Table(strings.Join(fromClauses, ", ")), nil
+		Order(orderClause)
+
+	//add limit and offset clauses if present
+	if query.Limit != nil {
+		fluentQuery = fluentQuery.Limit(*query.Limit)
+	}
+	if query.Offset != nil {
+		fluentQuery = fluentQuery.Offset(*query.Offset)
+	}
+
+	return fluentQuery.Table(strings.Join(fromClauses, ", ")), nil
 }
 
 /// INTERNAL functionality. These functions are exported for testing, but are not available in the Interface
@@ -227,14 +237,17 @@ type SearchParameter struct {
 	Modifier string
 }
 
-//Lists in the SearchParameterValueOperatorTree are AND'd together, and items within each SearchParameterValueOperatorTree list are OR'd together
-//For example, the following would be AND'd together, and then OR'd with the next SearchParameterValueOperatorTree
-// {
-//  {SearchParameterValue{Value: "foo"}, SearchParameterValue{Value: "bar"}}
-//  {SearchParameterValue{Value: "baz"}},
-// }
-//This would result in the following SQL:
-//  (value = "foo" OR value = "bar") AND (value = "baz")
+// Lists in the SearchParameterValueOperatorTree are AND'd together, and items within each SearchParameterValueOperatorTree list are OR'd together
+// For example, the following would be AND'd together, and then OR'd with the next SearchParameterValueOperatorTree
+//
+//	{
+//	 {SearchParameterValue{Value: "foo"}, SearchParameterValue{Value: "bar"}}
+//	 {SearchParameterValue{Value: "baz"}},
+//	}
+//
+// This would result in the following SQL:
+//
+//	(value = "foo" OR value = "bar") AND (value = "baz")
 type SearchParameterValueOperatorTree [][]SearchParameterValue
 
 type SearchParameterValue struct {
@@ -243,7 +256,7 @@ type SearchParameterValue struct {
 	SecondaryValues map[string]interface{}
 }
 
-//SearchParameters are made up of parameter names and modifiers. For example, "name" and "name:exact" are both valid search parameters
+// SearchParameters are made up of parameter names and modifiers. For example, "name" and "name:exact" are both valid search parameters
 // This function will parse the searchCodeWithModifier and return the SearchParameter
 func ProcessSearchParameter(searchCodeWithModifier string, searchParamTypeLookup map[string]string) (SearchParameter, error) {
 	searchParameter := SearchParameter{}
@@ -284,8 +297,9 @@ func ProcessSearchParameter(searchCodeWithModifier string, searchParamTypeLookup
 // top level is AND'd together, and each item within the lists are OR'd together
 //
 // For example, searchParamCodeValueOrValuesWithPrefix may be:
-//  "code": "29463-7,3141-9,27113001"
-//  "code": ["le29463-7", "gt3141-9", "27113001"]
+//
+//	"code": "29463-7,3141-9,27113001"
+//	"code": ["le29463-7", "gt3141-9", "27113001"]
 func ProcessSearchParameterValueIntoOperatorTree(searchParameter SearchParameter, searchParamCodeValueOrValuesWithPrefix interface{}) (SearchParameterValueOperatorTree, error) {
 
 	searchParamCodeValuesWithPrefix := []string{}
@@ -416,7 +430,7 @@ func NamedParameterWithSuffix(parameterName string, suffix string) string {
 	return fmt.Sprintf("%s_%s", parameterName, suffix)
 }
 
-//SearchCodeToWhereClause converts a searchCode and searchCodeValue to a where clause and a map of named parameters
+// SearchCodeToWhereClause converts a searchCode and searchCodeValue to a where clause and a map of named parameters
 func SearchCodeToWhereClause(searchParam SearchParameter, searchParamValue SearchParameterValue, namedParameterSuffix string) (string, map[string]interface{}, error) {
 
 	//add named parameters to the lookup map. Basically, this is a map of all the named parameters that will be used in the where clause we're generating
@@ -575,7 +589,7 @@ func AggregationParameterToClause(aggParameter SearchParameter) string {
 	}
 }
 
-//ProcessAggregationParameter processes the aggregation parameters which are fields with optional properties:
+// ProcessAggregationParameter processes the aggregation parameters which are fields with optional properties:
 // Fields that are primitive types (number, uri) must not have any property specified:
 // eg. `probability`
 //

backend/pkg/models/query_resource.go

@@ -11,6 +11,8 @@ type QueryResource struct {
 	Select []string               `json:"select"`
 	From   string                 `json:"from"`
 	Where  map[string]interface{} `json:"where"`
+	Limit  *int                   `json:"limit,omitempty"`
+	Offset *int                   `json:"offset,omitempty"`
 
 	//aggregation fields
 	Aggregations *QueryResourceAggregations `json:"aggregations"`
@@ -56,7 +58,13 @@ func (q *QueryResource) Validate() error {
 		if strings.Contains(q.Aggregations.OrderBy, " ") {
 			return fmt.Errorf("order_by cannot have spaces (or aliases)")
 		}
+	}
 
+	if q.Limit != nil && *q.Limit < 0 {
+		return fmt.Errorf("'limit' must be greater than or equal to zero")
+	}
+	if q.Offset != nil && *q.Offset < 0 {
+		return fmt.Errorf("'offset' must be greater than or equal to zero")
 	}
 
 	return nil

frontend/src/app/models/widget/dashboard-widget-query.ts

@@ -3,8 +3,8 @@ export class DashboardWidgetQuery {
   select: string[]
   from: string
   where: {[key: string]: string | string[]}
-  // limit: number
-  // offset: number
+  limit?: number
+  offset?: number
 
   //https://lodash.com/docs/4.17.15#unionBy
   aggregations?: {

frontend/src/app/pages/report-labs/report-labs.component.html

@@ -22,8 +22,7 @@
               <div ngbDropdownMenu aria-labelledby="dropdownReports">
                 <button ngbDropdownItem>All</button>
                 <button ngbDropdownItem [disabled]="true">-----</button>
-                <button ngbDropdownItem>Report 1</button>
-                <button ngbDropdownItem>Report 2</button>
+                <button *ngFor="let diagnosticReport of diagnosticReports" ngbDropdownItem>{{diagnosticReport?.sort_title}} [{{diagnosticReport?.sort_date | amDateFormat: 'LL'}}]</button>
               </div>
             </div>
             <div ngbDropdown class="d-inline-block float-right">

frontend/src/app/pages/report-labs/report-labs.component.ts

@@ -17,12 +17,39 @@ export class ReportLabsComponent implements OnInit {
 
   isEmptyReport = false
 
+  diagnosticReports: ResourceFhir[] = []
+
   constructor(
     private fastenApi: FastenApiService,
   ) { }
 
   ngOnInit(): void {
     this.loading = true
+
+    this.fastenApi.queryResources({
+      select: ["*"],
+      from: "DiagnosticReport",
+      where: {
+        "category": "http://terminology.hl7.org/CodeSystem/v2-0074|LAB",
+      },
+      limit: 5,
+    }).subscribe(results => {
+      this.diagnosticReports = results.data
+      console.log("ALL DIAGNOSTIC REPORTS", results)
+    })
+
+    this.fastenApi.queryResources({
+        select: ["*"],
+        from: "Observation",
+        where: {},
+        aggregations: {
+          order_by: "code:code"
+        }
+    }).subscribe(results => {
+      console.log("OBSERVATIONS GROUPED", results)
+    })
+
+
     this.fastenApi.getResources("Observation").subscribe(results => {
       this.loading = false
       results = results || []