inital

node_modules/postcss-import/lib/parse-statements.js

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+"use strict"
+
+// external tooling
+const valueParser = require("postcss-value-parser")
+
+// extended tooling
+const { stringify } = valueParser
+
+function split(params, start) {
+  const list = []
+  const last = params.reduce((item, node, index) => {
+    if (index < start) return ""
+    if (node.type === "div" && node.value === ",") {
+      list.push(item)
+      return ""
+    }
+    return item + stringify(node)
+  }, "")
+  list.push(last)
+  return list
+}
+
+module.exports = function (result, styles) {
+  const statements = []
+  let nodes = []
+
+  styles.each(node => {
+    let stmt
+    if (node.type === "atrule") {
+      if (node.name === "import") stmt = parseImport(result, node)
+      else if (node.name === "media") stmt = parseMedia(result, node)
+      else if (node.name === "charset") stmt = parseCharset(result, node)
+    }
+
+    if (stmt) {
+      if (nodes.length) {
+        statements.push({
+          type: "nodes",
+          nodes,
+          media: [],
+          layer: [],
+        })
+        nodes = []
+      }
+      statements.push(stmt)
+    } else nodes.push(node)
+  })
+
+  if (nodes.length) {
+    statements.push({
+      type: "nodes",
+      nodes,
+      media: [],
+      layer: [],
+    })
+  }
+
+  return statements
+}
+
+function parseMedia(result, atRule) {
+  const params = valueParser(atRule.params).nodes
+  return {
+    type: "media",
+    node: atRule,
+    media: split(params, 0),
+    layer: [],
+  }
+}
+
+function parseCharset(result, atRule) {
+  if (atRule.prev()) {
+    return result.warn("@charset must precede all other statements", {
+      node: atRule,
+    })
+  }
+  return {
+    type: "charset",
+    node: atRule,
+    media: [],
+    layer: [],
+  }
+}
+
+function parseImport(result, atRule) {
+  let prev = atRule.prev()
+  if (prev) {
+    do {
+      if (
+        prev.type !== "comment" &&
+        (prev.type !== "atrule" ||
+          (prev.name !== "import" &&
+            prev.name !== "charset" &&
+            !(prev.name === "layer" && !prev.nodes)))
+      ) {
+        return result.warn(
+          "@import must precede all other statements (besides @charset or empty @layer)",
+          { node: atRule }
+        )
+      }
+      prev = prev.prev()
+    } while (prev)
+  }
+
+  if (atRule.nodes) {
+    return result.warn(
+      "It looks like you didn't end your @import statement correctly. " +
+        "Child nodes are attached to it.",
+      { node: atRule }
+    )
+  }
+
+  const params = valueParser(atRule.params).nodes
+  const stmt = {
+    type: "import",
+    node: atRule,
+    media: [],
+    layer: [],
+  }
+
+  // prettier-ignore
+  if (
+    !params.length ||
+    (
+      params[0].type !== "string" ||
+      !params[0].value
+    ) &&
+    (
+      params[0].type !== "function" ||
+      params[0].value !== "url" ||
+      !params[0].nodes.length ||
+      !params[0].nodes[0].value
+    )
+  ) {
+    return result.warn(`Unable to find uri in '${  atRule.toString()  }'`, {
+      node: atRule,
+    })
+  }
+
+  if (params[0].type === "string") stmt.uri = params[0].value
+  else stmt.uri = params[0].nodes[0].value
+  stmt.fullUri = stringify(params[0])
+
+  let remainder = params
+  if (remainder.length > 2) {
+    if (
+      (remainder[2].type === "word" || remainder[2].type === "function") &&
+      remainder[2].value === "layer"
+    ) {
+      if (remainder[1].type !== "space") {
+        return result.warn("Invalid import layer statement", { node: atRule })
+      }
+
+      if (remainder[2].nodes) {
+        stmt.layer = [stringify(remainder[2].nodes)]
+      } else {
+        stmt.layer = [""]
+      }
+      remainder = remainder.slice(2)
+    }
+  }
+
+  if (remainder.length > 2) {
+    if (remainder[1].type !== "space") {
+      return result.warn("Invalid import media statement", { node: atRule })
+    }
+
+    stmt.media = split(remainder, 2)
+  }
+
+  return stmt
+}