Packaging: Rafactor Python core libraries

Extract the external facing `qll` files into the codeql/python-all
query pack.

python/ql/lib/semmle/python/frameworks/Simplejson.qll

@@ -0,0 +1,84 @@
+/**
+ * Provides classes modeling security-relevant aspects of the `simplejson` PyPI package.
+ * See https://simplejson.readthedocs.io/en/latest/.
+ */
+
+private import python
+private import semmle.python.dataflow.new.DataFlow
+private import semmle.python.dataflow.new.TaintTracking
+private import semmle.python.Concepts
+private import semmle.python.ApiGraphs
+
+/**
+ * Provides models for the `simplejson` PyPI package.
+ * See https://simplejson.readthedocs.io/en/latest/.
+ */
+private module SimplejsonModel {
+  /**
+   * A call to `simplejson.dumps`.
+   *
+   * See https://simplejson.readthedocs.io/en/latest/#simplejson.dumps
+   */
+  private class SimplejsonDumpsCall extends Encoding::Range, DataFlow::CallCfgNode {
+    SimplejsonDumpsCall() { this = API::moduleImport("simplejson").getMember("dumps").getACall() }
+
+    override DataFlow::Node getAnInput() { result in [this.getArg(0), this.getArgByName("obj")] }
+
+    override DataFlow::Node getOutput() { result = this }
+
+    override string getFormat() { result = "JSON" }
+  }
+
+  /**
+   * A call to `simplejson.dump`.
+   *
+   * See https://simplejson.readthedocs.io/en/latest/#simplejson.dump
+   */
+  private class SimplejsonDumpCall extends Encoding::Range, DataFlow::CallCfgNode {
+    SimplejsonDumpCall() { this = API::moduleImport("simplejson").getMember("dump").getACall() }
+
+    override DataFlow::Node getAnInput() { result in [this.getArg(0), this.getArgByName("obj")] }
+
+    override DataFlow::Node getOutput() {
+      result.(DataFlow::PostUpdateNode).getPreUpdateNode() in [
+          this.getArg(1), this.getArgByName("fp")
+        ]
+    }
+
+    override string getFormat() { result = "JSON" }
+  }
+
+  /**
+   * A call to `simplejson.loads`.
+   *
+   * See https://simplejson.readthedocs.io/en/latest/#simplejson.loads
+   */
+  private class SimplejsonLoadsCall extends Decoding::Range, DataFlow::CallCfgNode {
+    SimplejsonLoadsCall() { this = API::moduleImport("simplejson").getMember("loads").getACall() }
+
+    override DataFlow::Node getAnInput() { result in [this.getArg(0), this.getArgByName("s")] }
+
+    override DataFlow::Node getOutput() { result = this }
+
+    override string getFormat() { result = "JSON" }
+
+    override predicate mayExecuteInput() { none() }
+  }
+
+  /**
+   * A call to `simplejson.load`.
+   *
+   * See https://simplejson.readthedocs.io/en/latest/#simplejson.load
+   */
+  private class SimplejsonLoadCall extends Decoding::Range, DataFlow::CallCfgNode {
+    SimplejsonLoadCall() { this = API::moduleImport("simplejson").getMember("load").getACall() }
+
+    override DataFlow::Node getAnInput() { result in [this.getArg(0), this.getArgByName("fp")] }
+
+    override DataFlow::Node getOutput() { result = this }
+
+    override string getFormat() { result = "JSON" }
+
+    override predicate mayExecuteInput() { none() }
+  }
+}